Originally Posted By: Saturn_Fan
If I could ever get a straight answer from my dealer on whether my 08 1ZZFE Corolla can use 20wt I'd go that route too. That silly TSB lists my engine, but then the dealer says I cannot use 5w-20 and I have to go with what is stamped on the cap (5w-30). Dealer said warranty void if 20wt used.
I wonder why Toyota comes out with a TSB that says my engine should be switched but dealer says no?
I would go off of the cap listings IMO, which i am doing on my 08 corolla.
IMO, toyota is buying into the so called CAFE regulations by listing the TSB on 20w oils. I'm not buying the fact our corolla's MUST have 20w.
I've been running Amsoil ASL 5w30 in ours since new and don't plan on changing, unless i decide to go with the SSO 0w30. I now have 19k on the car and 13k of that is on the same ASL oil with 2 OEM filter changes and the oil is only carmel in color and never uses a drop.
MPG on the car is 30 all city driving, and 42 hiway at 70mph, and 39 hiway at 75mph. It's a 5-speed manual sporting the Amsoil synthetic MTG gear lube in the diff.
I'm sure the dealer is going strictly off what the cap says only.
I'd say.........go off what the cap says & don't worry about it. If you'd like to maybe gain some mpg, then go with a 0w30.
Just my .02 cents.