Does anybody know which brand engine oil is good. I see most garages change engine oil with "Castrol", is there any difference between them?. I find Wal-Mart sells "Quaker"(4L) for 6.98, is it good compare with Castrol, how about Esso, MotoMaster, Tech2000, ...
And how about oil filter, Thanks
To Trust:
All the engine oils on the market are more or less the same stuff. These oils are for cars (not for airplanes). Therefore you can use any brands as long as the specification is correct.