Is it OK to put petrol in a diesel engine?
Is it OK to put petrol in a diesel engine? The oil is fine, just change it in 5k miles time. I have just looked at the Castrol.co.uk website, and Castrol GTX high mileage oil is SL/CF. The CF bit meens that it is OK for older diesel engines. So I think you will be fine with this oil. Petrol oil in diesel engine !!! - Colonel Panic api-ep.api.org/quality/index.cfm?bitmask=5447BD83-...# What kind of oil do you put in a diesel engine? The oil I have put in is 15w40 Castrol High Mileage oil which is intended for petrol engines. a) will...