Do any of you change your own oil in one or two of your cars that you are able to do on your own with one brand that you are loyal to, but have another car or a truck that you are unable to change the oil in on your own and take to a dealer or quick lube who uses a different brand than you use, and does it bother you? I ask because my best friend loves his Castrol, but in his other car that is too difficult to perform an oil change on…we have no Castrol installers, and they charge out the keaster to use a brand other than what they provide..mostly Pennzoil around here.. Lucky for me I’m brand loyal and I know it would bother me if I didn’t have the same brand in all my vehicles even though it wouldn’t hurt a thing. It’s sort of strange quirk and wondered if anyone else is the same way.