API CG-4 - Diesel engine oil, API CG-4 performance level

API's service category for heavy-duty diesel engines, written for fuel below 0.5 % sulphur. An earlier category in the API service classification, written for the engines of its era; it still appears on datasheets alongside the current categories.

Name: Diesel engine oil, API CG-4 performance level
Issued by: API (American Petroleum Institute)
Category: Engine oil performance
Status: Withdrawn
Verified: 30 August 2026 · Source

Products meeting API CG-4

Engine oils

On order
Akros Synt Gold
Multigrade synthetic engine oil for tractors and agricultural and earthmoving machinery
SAE 10W-40
On order
Akros Turbo 15W40
Engine oil for tractors and farm machinery, turbocharged or naturally aspirated
SAE 15W-40
On order
CAT DEO ULS 10W-30
API CK-4 heavy-duty diesel engine oil for engines with aftertreatment, backward compatible
SAE 10W-30
On order
CAT DEO-ULS 15W-40
API CK-4 heavy-duty diesel engine oil for engines with aftertreatment, backward compatible
SAE 15W-40
On order
Eni i-Sigma performance E3 15W-40
Multigrade S.H.P.D. oil with a long drain interval, for diesel engines
SAE 15W-40
On order
Eni i-Sigma performance E3 20W-50
Multigrade oil for the diesel engines of heavy vehicles and cars
SAE 20W-50
On order
Eni i-Sigma universal 15W-40
Universal multigrade oil for mixed diesel and gasoline fleets
SAE 15W-40
On order
Eni i-Sigma universal 20W-50
Universal multigrade oil for mixed diesel and gasoline fleets
SAE 20W-50
On order
Mobil Delvac 1 5W-40
Synthetic heavy-duty diesel oil with long-drain capability, ACEA E4/E7, API CI-4 PLUS
SAE 5W-40
On order
Mobil Delvac 1 ESP 5W-40
Synthetic heavy-duty diesel oil, mineral-oil compatible, ACEA E4/E7
SAE 5W-40
On order
Mobil Delvac Legend 15W-40 Heavy Duty
Synthetic-blend heavy-duty diesel oil for on- and off-highway service, ACEA E3, API CH-4
SAE 15W-40
On order
Mobil Delvac MX 15W-40
Heavy-duty diesel oil for mixed fleets, ACEA E7, API CI-4, Volvo VDS-3
SAE 15W-40
On order
Mobil Delvac MX Extra 10W-40
Semi-synthetic heavy-duty diesel oil for mixed fleets, ACEA E7, API CI-4, MTU 2
SAE 10W-40
On order
Mobil Delvac Modern 10W-30 Full Protection
Synthetic-technology diesel oil for EGR and DPF engines, API CK-4, Volvo VDS-4.5
SAE 10W-30
On order
Mobil Delvac Modern 10W-40 Super Defense
Synthetic-technology diesel oil for mixed fleets, ACEA E7, API CI-4, MTU Oil Category 2
SAE 10W-40
On order
Mobil Delvac Modern 15W-40 Full Protection
Synthetic-technology diesel oil for EGR and DPF engines, API CK-4, Cat ECF-3, ACEA E11
SAE 15W-40
On order
Mobil Delvac Modern 15W-40 Super Defense V4
Synthetic-technology diesel oil for mixed fleets, ACEA E7, API CI-4, Cat ECF-2
SAE 15W-40
On order
Mobil Delvac Super 1400 15W-40
Heavy-duty diesel oil for severe service, MTU Oil Category 2, ACEA E3, API CH-4
SAE 15W-40
On order
Mobil Delvac Ultra 5W-40 Ultimate Defense
Synthetic heavy-duty diesel engine oil for severe service, long-drain, ACEA E4/E7
SAE 5W-40
On order
Mobil Super Everyday Protection 5W-40
Engine oil for petrol and diesel engines without particulate filter, ACEA A3/B4
SAE 5W-40
On order
Shell Rimula R2 Extra 15W-40
Mineral multigrade oil for heavy duty diesel engines in normal service
SAE 15W-40
On order
Shell Rimula Ultra 5W-30
Fully synthetic low-SAPS oil for high-capacity diesel engines
SAE 5W-30

Agricultural multifunction oils

Divinol
On order
Divinol Spezialöl HGB 10W-30
STOU oil for engine, gearbox and hydraulics of agricultural and forestry machines
SAE 10W-30
Divinol
On order
Divinol Syntrac TS 10W-40
Synthetic-based STOU oil for agricultural and construction machinery, easy cold starting
SAE 10W-40
On order
Eni Multitech 10W-30
Multifunctional oil for every component of agricultural machinery
SAE 10W-30
On order
Eni Multitech 10W-40
Multifunctional oil for every component of agricultural machinery
SAE 10W-40
On order
Eni Multitech 15W-40
Multifunctional oil for every component of agricultural machinery
SAE 15W-40
On order
Mobil Agri Extra 10W-40
Semi-synthetic STOU oil for farm engines, transmissions, hydraulics and wet brakes
SAE 10W-40
On order
Mobil Delvac Modern 10W-40 Agri Universal
Semi-synthetic STOU oil for farm equipment, ACEA E3, John Deere JDM J27D
SAE 10W-40

Marine lubricants

On order
Mobilgard HSD CI-4 Series
Multigrade oil for severe-service high-speed marine diesel engines, SAE 15W-40 or 20W-50
Cummins CES 20076
On order
Petronas Disrol CI-4
15W-40 oil for high-speed marine diesel engines, API CI-4
API CI-4

API standards

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