Couldn't you just request they use 5-40? I thought most places kept many oils on shelf.
I've done all mine, so I can't give any advice other than the obvious 'bend over at the dealer' routine. At least you'd know what oil they use.
I've done all mine, so I can't give any advice other than the obvious 'bend over at the dealer' routine. At least you'd know what oil they use.