API CI-4 – diesel engine oil

API's service category for compression-ignition engines. Current category.

Also written as: CI-4

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

Products covered by this standard

Eni

8 products

Eni Engine oils

Eni i-Sea inboard 4T 10W-40
Synthetic oil for four-stroke inboard marine engines
- High-speed marine
SAE 10W-40
Eni i-Sea inboard 4T 15W-40
Multigrade oil for four-stroke inboard marine engines
- High-speed marine
SAE 15W-40
Eni i-Sigma Bio tech 10W-30
Synthetic technology oil for commercial vehicle diesel engines
- Heavy-duty diesel
SAE 10W-30
Eni i-Sigma performance CMS 15W-40
Multigrade oil for heavy-duty diesels, meeting Cummins CES 20078
- Heavy-duty diesel
- Cars
SAE 15W-40
Eni i-Sigma performance E7 15W-40
Multigrade mineral oil for supercharged heavy-duty diesel engines
- Heavy-duty diesel
- Cars
- High-speed marine
SAE 15W-40
Eni i-Sigma special TMS 10W-40
Synthetic oil for diesel engines with exhaust aftertreatment systems
- Heavy-duty diesel
SAE 10W-40
Eni i-Sigma top 10W-40
Synthetic multigrade oil for heavy-duty engines under severe conditions
- Heavy-duty diesel
- High-speed marine
SAE 10W-40
Eni i-Sigma universal 10W-40
Universal synthetic oil for mixed fleets, with fuel economy
- Heavy-duty diesel
- Cars
SAE 10W-40

Petronas

16 products

Petronas Engine oils

Petronas Akros Synt Gold
Multigrade synthetic engine oil for tractors and agricultural and earthmoving machinery
- Heavy-duty diesel
SAE 10W-40
Petronas Akros Turbo 15W40
Engine oil for tractors and farm machinery, turbocharged or naturally aspirated
- Heavy-duty diesel
SAE 15W-40
Petronas Ambra Mastergold HSP 15W40
Engine oil for Tier 3 farm and off-highway engines with SCR/EGR, ACEA E7, CNH approved
- Heavy-duty diesel
SAE 15W-40
Petronas Arbor Alfatech 10W30
Diesel engine oil for farm and construction machinery with SCR/EGR, ACEA E7, API CI-4
- Heavy-duty diesel
SAE 10W-30
Petronas Arbor Alfatech 15W40
Diesel engine oil for farm and construction machinery with SCR/EGR, ACEA E7, API CI-4
- Heavy-duty diesel
SAE 15W-40
Petronas Arbor Alfatech Synt 10W40
Diesel engine oil for farm and construction machinery with SCR/EGR, ACEA E7, MB 228.3
- Heavy-duty diesel
SAE 10W-40
Petronas Urania 3000 10W-40
Semi-synthetic heavy-duty diesel engine oil for EGR engines, ACEA E7, API CI-4
- Heavy-duty diesel
- Cars
SAE 10W-40
Petronas Urania 3000 15W-40
Heavy-duty diesel engine oil for SCR and EGR engines, ACEA E7, API CI-4, MB 228.3
- Heavy-duty diesel
SAE 15W-40
Petronas Urania 5000 LSE
Synthetic low-SAPS oil for Euro VI and Euro V heavy-duty diesel engines, ACEA E11/E8/E7
- Heavy-duty diesel
SAE 10W-40
Petronas Urania LD7
Mineral oil for Euro III–V heavy-duty diesel engines with SCR or EGR, developed with IVECO
- Heavy-duty diesel
SAE 15W-40
Petronas Urania 5000 10W-40
Synthetic ACEA E7/E4 engine oil for heavy-duty diesel trucks, extended drain interval
- Heavy-duty diesel
SAE 10W-40
Petronas Urania Ecosynth
Low-ash synthetic engine oil for CNG and LNG engines
- CNG/LNG trucks
SAE 10W-40
Petronas Urania Prime 10W40
Premium heavy-duty oil for Euro III-V trucks, compatible with EGR and SCR systems
- Heavy-duty diesel
- Cars
SAE 10W-40
Petronas Urania Prime 15W40
Premium heavy-duty oil for Euro III-V trucks, approved DTFR 15B110 (MB 228.3)
- Heavy-duty diesel
SAE 15W-40
Petronas Urania Prime Long Drain 10W40
Premium extended-drain heavy-duty oil for Euro V trucks, approved DTFR 15B120
- Heavy-duty diesel
SAE 10W-40

Petronas Marine lubricants

Petronas Disrol CI-4
15W-40 oil for high-speed marine diesel engines, API CI-4
- High-speed marine
SAE 15W-40

Divinol

7 products

Divinol Engine oils

Divinol
Divinol Multimax Extra 10W-40
Semi-synthetic light-running SHPD oil for Euro IV and V diesel engines, ACEA E7/A3/B4
- Heavy-duty diesel
- Cars
SAE 10W-40
Divinol
Divinol Multimax LoSAPS 5W-30
Low SAPS MHPD oil for Euro V and VI truck diesel engines, with fuel savings, ACEA E6/E7
- Heavy-duty diesel
SAE 5W-30
Divinol
Divinol Multimax Plus 10W-40
Synthesis-technology low SAPS MHPD oil for Euro V and VI diesel engines with DPF or SCR
- Heavy-duty diesel
SAE 10W-40
Divinol
Divinol Multimax Synth 10W-40
USHPD synthesis-technology oil for Euro 4/5 commercial vehicles, extended oil drains
- Heavy-duty diesel
SAE 10W-40
Divinol
Divinol Multimax Top 15W-40
Multigrade oil for mixed fleets with Euro 4/5 diesel and petrol engines
- Heavy-duty diesel
- Cars
SAE 15W-40
Divinol
Divinol Multimax Top 20W-50
Multigrade oil for mixed diesel and petrol fleets, for warmer climates
- Heavy-duty diesel
- Cars
SAE 20W-50
Divinol
Divinol Multimax Truck Agrar 15W-40
Diesel engine oil for trucks, agricultural and construction machinery with high mileage
- Heavy-duty diesel
SAE 15W-40

Shell

10 products

Shell Engine oils

Shell Rimula R4 L 15W-40
Low-SAPS oil for heavy duty diesel engines with particulate filters
- Heavy-duty diesel
SAE 15W-40
Shell Rimula R4 X 15W-40
Multigrade oil for heavy duty diesel engines, on- and off-highway
- Heavy-duty diesel
SAE 15W-40
Shell Rimula R5 E 10W-40
Semi-synthetic oil for heavy duty diesel engines, with excellent soot control
- Heavy-duty diesel
SAE 10W-40
Shell Rimula R5 LE 10W-30
Low-SAPS oil for heavy duty diesel engines with exhaust after-treatment
- Heavy-duty diesel
SAE 10W-30
Shell Rimula R5 LE 10W-40
Low-SAPS oil for heavy duty diesel engines with exhaust after-treatment
- Heavy-duty diesel
SAE 10W-40
Shell Rimula R6 LM 10W-40
Synthetic low-SAPS oil for heavy duty diesel engines, with long oil life
- Heavy-duty diesel
SAE 10W-40
Shell Rimula R6 LME Plus 5W-30
Fully synthetic low-SAPS diesel engine oil, with fuel economy
- Heavy-duty diesel
SAE 5W-30
Shell Rimula R6 M 10W-40
Synthetic oil for Euro 4 and Euro 5 diesel engines without particulate filters
- Heavy-duty diesel
SAE 10W-40
Shell Rimula Ultra 5W-30
Fully synthetic low-SAPS oil for high-capacity diesel engines
- Heavy-duty diesel
SAE 5W-30

Shell Marine lubricants

Shell Sirius S4 15W-40
Engine oil for high-speed marine diesel engines
- High-speed marine
SAE 15W-40

Mobil

17 products

Mobil Engine oils

Mobil Delvac 1 5W-40
Synthetic heavy-duty diesel oil with long-drain capability, ACEA E4/E7, API CI-4 PLUS
- Heavy-duty diesel
SAE 5W-40
Mobil Delvac 1 ESP 5W-40
Synthetic heavy-duty diesel oil, mineral-oil compatible, ACEA E4/E7
- Heavy-duty diesel
SAE 5W-40
Mobil Delvac Modern 10W-30 Full Protection
Synthetic-technology diesel oil for EGR and DPF engines, API CK-4, Volvo VDS-4.5
- Heavy-duty diesel
SAE 10W-30
Mobil Delvac Modern 10W-40 Advanced Protection
Low-SAPS oil for Euro V/VI DPF engines, ACEA E6/E9, MAN M 3775
- Heavy-duty diesel
SAE 10W-40
Mobil Delvac Modern 10W-40 Super Defense
Synthetic-technology diesel oil for mixed fleets, ACEA E7, API CI-4, MTU Oil Category 2
- Heavy-duty diesel
- Cars
SAE 10W-40
Mobil Delvac Modern 10W-40 Super Defense V1
Synthetic-technology diesel oil for long drains, ACEA E4/E7, MAN M 3277
- Heavy-duty diesel
SAE 10W-40
Mobil Delvac Modern 15W-40 Full Protection
Synthetic-technology diesel oil for EGR and DPF engines, API CK-4, Cat ECF-3, ACEA E11
- Heavy-duty diesel
SAE 15W-40
Mobil Delvac Modern 15W-40 Super Defense V4
Synthetic-technology diesel oil for mixed fleets, ACEA E7, API CI-4, Cat ECF-2
- Heavy-duty diesel
- Cars
SAE 15W-40
Mobil Delvac MX 15W-40
Heavy-duty diesel oil for mixed fleets, ACEA E7, API CI-4, Volvo VDS-3
- Heavy-duty diesel
- Cars
SAE 15W-40
Mobil Delvac MX Extra 10W-40
Semi-synthetic heavy-duty diesel oil for mixed fleets, ACEA E7, API CI-4, MTU 2
- Heavy-duty diesel
- Cars
SAE 10W-40
Mobil Delvac Ultra 5W-30 Ultimate Protection V2
Synthetic oil for Euro V/VI DPF diesel engines with long drains, API CK-4, ACEA E6/E8/E11
- Heavy-duty diesel
SAE 5W-30
Mobil Delvac Ultra 5W-40 Ultimate Defense
Synthetic heavy-duty diesel engine oil for severe service, long-drain, ACEA E4/E7
- Heavy-duty diesel
- High-speed marine
SAE 5W-40
Mobil Delvac Ultra 5W-40 Ultimate Protection V1
Low-ash full synthetic heavy-duty diesel engine oil for after-treatment systems, API CK-4
- Heavy-duty diesel
- Cars
SAE 5W-40
Mobil Delvac XHP ESP 10W-40
Synthetic heavy-duty diesel engine oil for modern engines, long-drain, API CI-4
- Heavy-duty diesel
SAE 10W-40
Mobil Delvac XHP Extra 10W-40
Long-drain synthetic diesel engine oil for modern on- and off-highway engines
- Heavy-duty diesel
SAE 10W-40

Mobil Marine lubricants

Mobilgard HSD 15W-40 CI-4
Multigrade oil for severe-service high-speed marine diesel engines, SAE 15W-40
- High-speed marine
SAE 15W-40
Mobilgard HSD 20W-50 CI-4
Multigrade oil for severe-service high-speed marine diesel engines, SAE 20W-50
- High-speed marine
SAE 20W-50

Caterpillar

2 products

Caterpillar Engine oils

CAT DEO ULS 10W-30
API CK-4 heavy-duty diesel engine oil for engines with aftertreatment, backward compatible
- Heavy-duty diesel
SAE 10W-30
CAT DEO-ULS 15W-40
API CK-4 heavy-duty diesel engine oil for engines with aftertreatment, backward compatible
- Heavy-duty diesel
SAE 15W-40

API standards

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