American Petroleum Institute (API) is the largest U.S trade association for the oil and natural gas industry. API’s certification program helps ensure quality and improves customer confidence in their oils.

American Petroleum Institute (API)

  • About API
  • API Specification Table
  • API FA-4
  • API CK-4
  • API CJ-4
  • API CI-4 Plus
  • API CI-4
  • API CH-4
  • API CG-4 to CD (Obsolete)

American Petroleum Institute (API)

The American Petroleum Institute (API) represents all aspects of America’s oil and natural gas industry, having more than 625 corporate members from all segments of the industry, from the largest major oil companies to the smallest of independents. These include producers, refiners, suppliers, marketers, pipeline operators and marine transporters, as well as service and supply companies that support all segments of the industry.

For consumers, API provides the API's Engine Oil Licensing and Certification System (EOLCS). It is a voluntary licensing and certification program that authorizes engine oil marketers who meet specified requirements to use the API Engine Oil Quality Marks. These emblems go directly on each container of oil that retains the certification for and is there to help consumers identify quality engine oils for their gasoline- and diesel-powered vehicles.

For more information on the API specifications, please use the menu on the left hand side of the page.

API Specification Table

API SpecificationNorth AmericaEurope, Africa & Middle EastAsia
South America
API FA-4For modern engines, offering fuel economy benefits including those with advanced emissions systems.For modern engines, offering fuel economy benefits including those with advanced emissions systems.For modern engines, offering fuel economy benefits including those with advanced emissions systems.For modern engines, offering fuel economy benefits including those with advanced emissions systems.
API CK-4Primary backward compatible performance category for all engines including those with advanced emissions systems.Primary backward compatible performance category for all engines including those with advanced emissions systems.Primary backward compatible performance category for all engines including those with advanced emissions systems.Primary backward compatible performance category for all engines including those with advanced emissions systems.
API CJ-4Active performance category for all engines including those with advanced emissions systems.Active performance category for all engines including those with advanced emissions systems.Active performance category for all engines including those with advanced emissions systems.Active performance category for all engines including those with advanced emissions systems.
API CI-4 PLUSActive performance category for high soot applications and high EGR.Active performance category for high soot applications and high EGR.Active performance category for high soot applications and high EGR.Active performance category for high soot applications and high EGR.
API CI-4Active performance category for high soot applications and high EGR.Active performance category for high soot applications and high EGR.Active performance category for high soot applications and high EGR.Active performance category for high soot applications and high EGR.
API CH-4Active performance category for engines without advanced after-treatment emissions systems.Active performance category for engines without advanced after-treatment emissions systems.Active performance category for engines without advanced after-treatment emissions systems. Replaces API CF-4 and CG-4 oils.Active performance category for engines without advanced after-treatment emissions systems. Replaces API CF-4 and CG-4 oils.
API CG-4Inactive specificationInactive specificationFor use in severe-duty, high-speed four stroke engines naturally aspirated and turbo charged diesel engines. Replaces API CF, CD, and CE oils.For use in severe- duty, high-speed four stroke engines naturally aspirated and turbo charged diesel engines. Replaces API CF, CD, and CE oils.
API CF-4Inactive specificationInactive specificationFor use in high-speed, four stroke naturally aspirated and turbo charged diesel engines. Replaces API CD and CE oils.For use in high-speed, four stroke naturally aspirated and turbo charged diesel engines. Replaces API CD and API CE oils.
API CFInactive specificationInactive specificationUsed extensively in older equipment where cost considerations dominate.Used extensively in older equipment where cost considerations dominate.
API CDInactive specificationInactive specificationUsed extensively in older equipment where cost considerations dominate.Used extensively in older equipment where cost considerations dominate.

API FA-4 Specification

API FA-4 describes certain XW-30 oils specifically formulated for use in select high-speed four-stroke cycle diesel engines designed to meet 2017 model year on-highway greenhouse gas (GHG) emission standards. These oils are formulated for use in on-highway applications with diesel fuel sulfur content up to 15 ppm. Refer to individual engine manufacturer recommendations regarding compatibility with API FA-4 oils.API FA-4 oils are blended to a high temperature high shear (HTHS) viscosity range of 2.9cP-3.2cP to assist in reducing GHG emissions. These oils are especially effective at sustaining emission control system durability where particulate filters and other advanced after-treatment systems are used.

API FA-4 oils are designed to provide enhanced protection against oil oxidation, viscosity loss due to shear, and oil aeration as well as protection against catalyst poisoning, particulate filter blocking, engine wear, piston deposits, degradation of low- and high-temperature properties, and soot' related viscosity increase. API FA-4 oils are neither interchangeable nor backward compatible with API CK-4, CJ-4, CI-4 with CI-4 PLUS, CI-4, and CH-4 oils. Refer to engine manufacturer recommendations to determine if API FA-4 oils are suitable for use. API FA-4 oils are not recommended for use with fuels having greater than 15 ppm sulfur. For fuels with sulfur contents greater than 15 ppm, refer to engine manufacturer recommendations.

TestApplicationRated or Measured ParameterOne Test Limit
T-12 ASTM D7422Cylinder and bearing wearTop ring mass Loss, mg, 105 max
Cylinder Liner Wear, μm, max24.0 max
T-13 WK50204Oxidative ThickeningIR peak at EOT, Abs., cm-1125
Kinematic viscosity increase at 40°C, % 75 max
Avg. oil consumption, 48 h to 192 h, g/h, maxReport
T-11 ASTM D7156Soot related viscosity increaseTGA % soot at 4.0 cSt increase @ 100 °C3.5 min
TGA % soot at 12.0 cSt increase @ 100 °C6.0 min
TGA % soot at 15.0 cSt increase @ 100 °C6.7 min
C13 ASTM D7549Merit rating1000 min
COAT WK51937Oil Aeration TestAverage aeration, 40 h to 50 h %0.118
ISB ASTM D7484Cam and valve train wearSlider tappet mass loss, mg, average100 max
Cam lobe wear, μm, average55 max
Crosshead mass loss, mg, averageReport
ISM D7468 Top ring mass Loss, mg100 max
Merit rating1000
1N ASTM D6750Aluminum piston depositsWeighted demerits286.2 max
Top groove fill, %20 max
Top land heavy carbon, %3 max
Oil consumption, g/kWh, (0 h – 252 h),0.54 max
(g/MJ) (0 h – 252 h)(0.15) max
Piston, ring, and liner scuffingnone
Piston ring stickingnone
RFWT ASTM D5966Valve train wearAverage pin wear, mils0.30 max
HTHS ASTM D4683Wear protectionViscosity @ 150 °C, mPa-s Xw-30- grades2.9 min 3.2 Max
HTC ASTM D6594Bearing corrosion controlUsed oil elemental control
Copper, mg/kg increase20 max
Lead, mg/kg increase120 max
Copper strip rating3 max
ASTM D7109Engine oil shear stabilityKin Vis @ 100°C after 90 passes, cSt XW-309.3 min
ASTM D5800Oil VolatilityEvaporative loss @ 250 °C, %13 max
ASTM D892Oil foamingSequence I, ml10/0
Sequence II, ml20/0
Sequence III, ml10/0
MRV TP-1 ASTM D6896Used sooted oil pumpingViscosity of 180 h used oil sample from the T-11 test, tested at -20°C, mPa-s25,000 max and yield stress <35 Pa
Sulfated Ash ASTM D874Emissions system compatibilityMass fraction, sulfated ash, %1.0 max
Phosphorus ASTM D4951Emissions system compatibilityMass fraction, phosphorus, %0.12 max
Sulfur ASTM D4951Emissions system compatibilityMass fraction, sulfur, %0.4 max
Seal Compatibility ASTM D7216Nitrile (NBR)
Volume change %(+5, -3)
Hardness change, points(+7, -5)
Tensile strength change, %(+10, -TMC 1006)
Elongation at break change, %(+10, -TMC 1006)
Silicone (VMQ)
Volume change %(+TMC 1006, -3)
Hardness change, points(+5, -TMC 1006)
Tensile strength change, %(+10, -45)
Elongation at break change, %(+20, -30)
Polyacrylate (ACM)
Volume change %(+5, -3)
Hardness change, points(+8, -5)
Tensile strength change, %(+18, -15)
Elongation at break change, %(+10, -35)
Fluoroelastomer (FKM)
Volume change %(+5, -2)
Hardness change, points(+7, -5)
Tensile strength change, %(+10, -TMC 1006)
Elongation at break change, %(+10, -TMC 1006)
Vamac G
Volume change %(+TMC 1006, -3)
Hardness change, points(+5, -TMC 1006)
Tensile strength change, %(+10, -TMC 1006)
Elongation at break change, %(+10, -TMC 1006)

API FA-4 oils are neither interchangeable nor backward compatible with API CK-4, CJ-4, CI-4 with CI-4 PLUS, CI-4, and CH-4 oils. Refer to engine manufacturer recommendations to determine if API FA-4 oils are suitable for use.- API

API CK-4 Specification

API CK-4 describes oils for use in high-speed four-stroke cycle diesel engines designed to meet 2017 model year on-highway and Tier 4 non-road exhaust emission standards, as well as for previous model year diesel engines. These oils are formulated for use in all applications with diesel fuels ranging in sulfur content up to 500 ppm. However, the use of these oils with greater than 15 ppm sulfur fuel may impact exhaust after-treatment system durability and/or oil drain interval. API CK-4 oils are especially effective at sustaining emission control system durability where particulate filters and other advanced after-treatment systems are used.

API CK-4 oils are designed to provide enhanced protection against oil oxidation, viscosity loss due to shear, and oil aeration as well as protection against catalyst poisoning, particulate filter blocking, engine wear, piston deposits, degradation of low- and high-temperature properties, and soot-related viscosity increase. These oils exceed the performance criteria of API CJ-4, CI-4 with CI-4 PLUS, CI-4, and CH-4 and can effectively lubricate engines calling for those API Service Categories. When using CK-4 oil with higher than 15 ppm sulfur fuel, consult the engine manufacturer for service interval recommendations.

TestApplicationRated or Measured ParameterOne Test Limit
T-12 ASTM D7422Cylinder and bearing wearTop ring mass Loss, mg, 105 max
Cylinder Liner Wear, μm, max24.0 max
T-13 WK50204Oxidative ThickeningIR peak at EOT, Abs., cm-1125
Kinematic viscosity increase at 40°C, % 75 max
Avg. oil consumption, 48 h to 192 h, g/h, maxReport
T-11 ASTM D7156Soot related viscosity increaseTGA % soot at 4.0 cSt increase @ 100 °C3.5 min
TGA % soot at 12.0 cSt increase @ 100 °C6.0 min
TGA % soot at 15.0 cSt increase @ 100 °C6.7 min
C13 ASTM D7549Merit rating1000 min
COAT WK51937Oil Aeration TestAverage aeration, 40 h to 50 h %0.118
ISB ASTM D7484Cam and valve train wearSlider tappet mass loss, mg, average100 max
Cam lobe wear, μm, average55 max
Crosshead mass loss, mg, averageReport
ISM D7468 Top ring mass Loss, mg100 max
Merit rating1000
1N ASTM D6750Aluminum piston depositsWeighted demerits286.2 max
Top groove fill, %20 max
Top land heavy carbon, %3 max
Oil consumption, g/kWh, (0 h – 252 h),0.54 max
(g/MJ) (0 h – 252 h)(0.15) max
Piston, ring, and liner scuffingnone
Piston ring stickingnone
RFWT ASTM D5966Valve train wearAverage pin wear, mils0.30 max
HTHS ASTM D4683Wear protectionViscosity @ 150 °C, mPa-s3.5 min
HTC ASTM D6594Bearing corrosion controlUsed oil elemental control
Copper, mg/kg increase20 max
Lead, mg/kg increase120 max
Copper strip rating3 max
ASTM D7109Engine oil shear stabilityKin Vis @ 100°C after 90 passes, cSt XW-309.3 min
Kin Vis @ 100°C after 90 passes, cSt XW-4012.5 min
NOACK ASTM D5800Oil VolatilityEvaporative loss @ 250 °C, %13 max
ASTM D892Oil foamingSequence I, ml10/0
Sequence II, ml20/0
Sequence III, ml10/0
MRV TP-1 ASTM D6896Used sooted oil pumpingViscosity of 180 h used oil sample from the T-11 test, tested at -20°C, mPa-s25,000 max and yield stress <35 Pa
Sulfated Ash ASTM D874Emissions system compatibilityMass fraction, sulfated ash, %1.0 max
Phosphorus ASTM D4951Emissions system compatibilityMass fraction, phosphorus, %0.12 max
Sulfur ASTM D4951Emissions system compatibilityMass fraction, sulfur, %0.4 max
Seal Compatibility ASTM D7216Nitrile (NBR)
Volume change %(+5, -3)
Hardness change, points(+7, -5)
Tensile strength change, %(+10, -TMC 1006)
Elongation at break change, %(+10, -TMC 1006)
Silicone (VMQ)
Volume change %(+TMC 1006, -3)
Hardness change, points(+5, -TMC 1006)
Tensile strength change, %(+10, -45)
Elongation at break change, %(+20, -30)
Polyacrylate (ACM)
Volume change %(+5, -3)
Hardness change, points(+8, -5)
Tensile strength change, %(+18, -15)
Elongation at break change, %(+10, -35)
Fluoroelastomer (FKM)
Volume change %(+5, -2)
Hardness change, points(+7, -5)
Tensile strength change, %(+10, -TMC 1006)
Elongation at break change, %(+10, -TMC 1006)
Vamac G
Volume change %(+TMC 1006, -3)
Hardness change, points(+5, -TMC 1006)
Tensile strength change, %(+10, -TMC 1006)
Elongation at break change, %(+10, -TMC 1006)

API CK-4 oils exceed the performance criteria of API CJ-4, CI-4 with CI-4 PLUS, CI-4, and CH-4 and can effectively lubricate engines calling for those API Service Categories.- API

API CJ-4 Specification

API Service Category CJ-4 is the primary performance category for high-speed, four-stroke diesel engines designed to meet 2010 model year on-highway and Tier 4 non-road exhaust emission standards, as well as for previous model year diesel engines. These oils are formulated for use in all applications with diesel fuels ranging in sulfur content up to 500 ppm (0.05% wt). However, the use of these oils with greater than 15 ppm (0.0015% wt) sulfur fuel may impact exhaust aftertreatment system durability and/or drain interval. When using API CJ-4 oils with higher than 15 ppm sulfur fuel, consult the engine manufacturer or service interval. API CJ-4 oils are especially effective at sustaining emission control system durability where particulate filters and other advanced aftertreatment systems are used. Optimum protection is provided for control of catalyst poisoning, particulate filter blocking, engine wear, piston deposits, low- and high-shear stability, soot handling properties, oxidative thickening, foaming and viscosity loss due to shear.

TestApplicationParameterOne Test Limit
T-12 ASTM D7422Cylinder and bearing wearMerit rating1000 min
ISM ASTM D7468Valve train and ring wear, sludge control and oil filter delta pressureMerit rating1000 min
Top ring weight loss, mg100 max
C13 ASTM D7549Piston deposits and oil consumptionMerit rating1000 min
Hot-stuck ringsnone
T-11 ASTM D7156Soot related viscosity increaseTGA % soot at 4.0 cSt increase @ 100°C3.5 min
TGA % soot at 12.0 cSt increase @ 100°C6.0 min
TGA % soot at 15.0 cSt increase @ 100°C6.7 min
ISB ASTM D7484Cam and valve train wearSlider tappet weight loss average, mg100 max
Cam lobe wear average, μm55 max
Crosshead weight loss average, mgreport
1N ASTM D6750Aluminum piston depositsWeighted demerits286.2 max
Top groove fill, %20 max
Top land heavy carbon, %3 max
Oil consumption, g/MJ (0-252h)0.139 max
Piston, ring, and liner scuffingnone
Piston ring stickingnone
RFWT ASTM D5966Valve train wearAverage pin wear, mils0.30 max
IIIF ASTM D6984Oxidative thickeningKin Vis @40°C % increase275 max
or
IIIG ASTM D7320Oxidative thickeningKin Vis @40°C % increase150 max
EOAT ASTM D6894Aeration controlAeration volume, %8.0 max
HTHS ASTM D4683Wear protectionViscosity @ 150°C, mPa-s3.5 min
HTCBT ASTM D6594Bearing corrosion controlUsed oil elemental control
Copper, mg/kg increase20 max
Lead, mg/kg increase120 max
Copper strip rating3 max
ASTM D7109Engine oil shear stabilityKin Vis @ 100°C after 90 passes, cSt XW-309.3 min
Kin Vis @ 100°C after 90 passes, cSt XW-4012.5 min
ASTM D5800Oil consumptionEvaporative loss @ 250°C, %, Viscosities other than 10W-3013 max
Evaporative loss @250°C, %, 10W-3015 max
ASTM D892Oil foamingSequence I, ml10/0
Sequence II, ml20/0
Sequence III, ml10/0
MRV TP-1 ASTM D6896Used sooted oil pumpingViscosity of 180 h used oil sample from the T-11 test, tested at -20°C, mPa-s25,000 max and yield stress <35 Pa
Sulfated Ash ASTM D874Emissions system compatibilityMass fraction, sulfated ash, %1.0 max
Phosphorus ASTM D4951Emissions system compatibilityMass fraction, phosphorus, %0.12 max
Sulfur ASTM D4951Emissions system compatibilityMass fraction, sulfur, %0.4 max

API CJ-4 and API CI-4 Plus


APIcj-4

Oils approved for API Service Category CJ-4 exceed the performance criteria of Category CF-4, CG-4, CH-4, CI-4 and CI-4 PLUS, and can effectively lubricate engines calling for those API Service Categories.

Source:API Engine Oil Guide

Click here to see Lubrizol’s HD Relative Performance Tool.

API CI-4 PLUS Specification

API Service Category CI-4 oils that also carry the classification CI-4 PLUS are formulated to provide a higher level of protection against soot-related viscosity increase and viscosity loss due to shear in vehicles powered by diesel engines. As of September 1, 2004, oils that meet the requirements for API Service Category CI-4 PLUS and that are properly licensed may display “CI-4 PLUS” in the lower portion of the API Service Symbol in conjunction with API Service Category CI-4 in the upper portion.

TestApplicationParameterOne Test Limit
T-11 ASTM D7156Soot related viscosity increaseTGA % soot at 4.0 cSt increase at 100°C3.5 min
TGA % soot at 12.0 cSt increase at 100°C6.0 min
TGA % soot at 15.0 cSt increase at 100°C6.7 min
And
Shear Stability ASTM D7109Engine Oil Shear Stability after 90 passesKin Vis @ 100 °C after 90 passes, cSt XW-309.3 min
Kin Vis @ 100°C after 90 passes, cSt XW-4012.5 min

API CI-4 Plus and API CI-4

APIci-4plus

Oils that satisfy API Service Category CI-4 PLUS are superior in performance to those meeting API CF-4, CG-4, CH-4 and CI-4, and can effectively lubricate engines calling for those Service Categories.

Source: API Engine Oil Guide

Click here to see Lubrizol’s Relative Performance Tool.

API CI-4 Specification

API Service Category CI-4 was introduced in 2002 for high-speed, four-stroke engines designed to meet 2004 exhaust emission standards implemented in 2002. Compounded for use in all applications, API CI-4 oils are formulated to sustain engine durability where exhaust gas recirculation (EGR) and other exhaust emission components are used. API CI-4 oils are intended for use with diesel fuels ranging in sulfur content up to 0.5% wt. These oils provide optimal protection for control of corrosive wear tendencies, low and high temperature stability, soot handling properties, piston deposit control, valve train wear, oxidative thickening, foaming and viscosity loss due to shear.

TestApplicationParameterOne Test Limit
1R ASTM D6923Steel piston deposits, oil consumption, and ring sticking/distressWeighted demerits382 max
Top groove carbon demerits52 max
Top land carbon demerits31 max
Initial oil consumption g/h average (0-252 h)13.1 max
Final oil consumption g/h average (432-504 h)IOC + 1.8 max
Piston, ring, and liner distressnone
Ring stickingnone
or
1P ASTM D6681Steel piston deposits and oil consumptionWeighted demerits350 max
Top grove carbon demerits36
Top land carbon demerits40
Average oil consumption g/h (0-360 h)12.4 max
Final oil consumption g/h average (312-360 h)14.6
Piston, ring, and liner scuffingnone
1K ASTM D6750Aluminum piston deposits and oil consumptionWeighted demerits332 max
Top grove fill, %24 max
Top land heavy carbon, %4 max
Average oil consumption, g/MJ, (0-252 h)0.139 max
Piston, ring, and liner scuffingnone
T-10 ASTM D6987Cylinder and bearing wearMerit rating1000 min
or
T-12 ASTM D7422Cylinder and bearing wearMerit rating1000 min
M11 EGR ASTM D6975Valve train and ring wear, sludge control and oil filter delta pressureAverage crosshead wt. Loss, mg20.0 max
Average top ring weight loss, mgreport
Oil filter differential pressure at 250 h, kPa275 max
Average engine sludge, CRC merits at end of test7.8 min
or
ISM ASTM D7468Valve train wear, sludge control, and oil filter delta pressureCrosshead wear, mg7.5 max
Oil filter delta pressure at 150 h, kPa55 max
Sludge rating, CRC merits8.1 min
Ext. T-8E ASTM D5967Soot related viscosity increaseRelative viscosity at 4.8% soot1.8
IIIF ASTM D6984Oxidative thickeningKin Vis @ 40° C, % increase275 max
or
IIIG ASTM D7320Oxidative thickeningKin Vis @ 40° C, % increase150
RFWT ASTM D5966Valve train wearAverage pin wear, mils0.30 max
EOAT ASTM D6894Aeration controlAeration, volume, %8.0 max
Elastomer compatibility ASTM D7216Seals protectionCompatibility with various seal materialsSee spec
Foam ASTM D892Oil foam (option A not allowed)Sequence I10/0
Sequence II20/0
Sequence III10/0
Kin Vis ASTM D6278Engine oil shear stabilityKin Vis @ 100 °C, cSt after 30 passes, XW-309.3 min
Kin Vis @ 100 °C, cSt after 30 passes, XW-4012.5 min
ASTM D5800Oil consumptionEvaporative loss @ 250 °C, %15 max
HTC ASTM D6594Bearing corrosion controlUsed oil elemental analysis
Copper, mg/kg increase20 max
Lead, mg/kg increase120 max
Tin, mg/kg increasereport
Copper strip rating3 max
HTHS ASTM D4683Wear protectionViscosity @ 150 °C, mPa-s3.5 min
MRV TP-1 ASTM D4684Used sooted oil pumpingViscosity of 75 h used oil sample from the T-10 tested at -20°C, mPa-s25,000 max and yield stress <35 Pa

API CI-4 and API CH-4

APIci-4

Oils approved for API Service Category CI-4 can be used in place of Category CD, CE, CF-4, CG-4 and CH-4 oils. API CI-4 oils are superior in performance to those meeting API CF-4, CG-4 and CH-4, and can effectively lubricate engines calling for those Service Categories.

Source: API Engine Oil Guide

Click here to see Lubrizol’s Relative Performance Tool.

API CH-4 Specification

API Service Category CH-4 was introduced in 1998 for high-speed, four-stroke engines without advanced after-treatment emissions systems, designed to meet 1998 exhaust emission standards. API CH-4 oils are specifically compounded for use with diesel fuels ranging in sulfur content up to 0.5% wt.

TestApplicationParameterOne Test Limit
1P ASTM D6681Steel piston depositsWeighted demerits350 max
Top groove carbon demerits36 max
Top land carbon demerits40 max
Average oil consumption, (0-360h), g/h12.4 max
Final oil consumption, (312-360), g/h14.6 max
Piston, ring, and liner scuffingNone
1K ASTM D6750Aluminum piston depositsWeighted demerits332 max
Top groove fill, %24 max
Top land heavy carbon, %4 max
Average oil consumption, g/MJ, (0-250h)0.139 max
Piston, ring, and liner scuffingNone
T-9 ASTM D6483Cylinder and bearing wearAverage liner wear, 1.75% soot, μm25.4 max
Average top ring weight loss, mg120 max
EOT lead content increase, mg/kg25 max
or
T-10 ASTM D6987Cylinder and bearing wearLiner wear, μm32 max
Ring wear, mg150 max
Lead content at EOT, mg/kg50 max
or
T-12 ASTM D7422Cylinder and bearing wearLiner wear, μm30.0 max
Top ring weight loss, mg120 max
Lead content at EOT, mg/kg65 max
RFWT ASTM D5966Valve train wearAverage pin wear, mils0.30 max
M11 ASTM D6838Valve train wear and depositsRocker pad average weight loss, mg6.5 max
Oil filter Δ Pressure EOT, kPa79 max
Average engine sludge, CRC merits8.7 min
or
ISM ASTM D7468Valve train wear and depositsCrosshead wear, mg7.5 max
Oil filter Δ Pressure 150 hrs, kPa79 max
Sludge rating, CRC merits8.1 min
ExtT-8E ASTM 5967Soot related vis increaseRelative viscosity @4.8% soot by TGA2.1 max
Vis increase @3.8% soot by TGA, cSt11.5  max
IIIF ASTM D6984Oxidative thickening60 h viscosity increase @40°C, %295 max
or
IIIG ASTM D7320Oxidative thickeningViscosity increase @40°C, %150 max
EOAT ASTM D6894Aeraation controlAeration volume, %8.0 max
HTC ASTM D6594Bearing corrosion controlUsed oil elemental control
Copper, mg/kg increase20 max
Lead, mg/kg increase120 max
Tin, mg/kg increasereport
Copper strip rating,3 max
Foam ASTM D892Oil foam (option A not allowed)Sequence I10/0
Sequence II20/0
Sequence III10/0
ASTM D5800Oil consumption% volatility loss @ 250°C, %    10W-3020 max
% volatility loss @ 250°C, %    15W-4018 max
or
ASTM D6417Oil consumption% volatility loss @ 371°C, %17 max
% volatility loss @ 371°C, %15 max
KinVis ASTM D6278Engine oil shear stabilityKin Vis @ 100°C, cSt after 30 passes, XW-309.3 min
Kin Vis @ 100°C, cSt after 30 passes, XW-4012.5 min

API CH-4 and API CG-4

APIch-4-new

Oils approved for API Service Category CH-4 can be used in place of Category CD, CE, CF-4 and CG-4 oils. API CH-4 oils are superior in performance to those meeting API CF-4 and CG-4, and can effectively lubricate engines calling for those API Service Categories.

Source: API Engine Oil Guide

Click here to see Lubrizol’s Relative Performance Tool.