API Service Categories
API service categories state which engines an oil is qualified for — S-series for petrol, C-series for diesel. Browse the range by category.
Petrol (S)
API SL
API SL is an earlier petrol service category, still called for by older engines. The ASAS…
1 product
API SNAPI SN is a petrol service category widely specified across the passenger-car fleet. Two…
2 products
API SPAPI SP is the current service category for petrol engines. It is the category modern…
1 product
Diesel (C)
API CI-4
API CI-4 is a heavy-duty diesel service category widely specified across commercial…
1 product
API CJ-4API CJ-4 is a heavy-duty diesel service category. The ASAS 20W-50 diesel oil is formulated…
1 product
API CK-4API CK-4 is the current heavy-duty diesel service category. The ASAS fully synthetic…
1 product