It gets even more confusing when trying to decide which kind of motor oil you should use. 10W-30, for example, sounds very close to 10W-40. After all, how different can they be? 10W-30 and 10W-40 ...

and 10W-30. Consumers should look for the API "Starburst" and API Service Category SQ "Donut" certification marks on engine oil bottles. These marks indicate that the oil meets GF-7A performance ...

Engine oil provides cooling ... Engine builders have included SAE 10W-30 in lube recommendations since API CJ-4 was introduced in 2006. It hasn’t expanded much, but use of SAE 10w-30 is expected ...

Oil performance also depends on individual usage parameters - climate conditions, traffic conditions, load on engine etc. we can look for 10w-30 variants and stick to one which gives better ...