[Brian R.]

Your inability to find your vehicle and others that you think should be covered is not relevant. This not a vehicle-specific claim on the pre-existing engines. This is engine-specific. Once they use 5W-20 in a vehicle on the assembly line, they are bound to place this recommendation into the owner's manual and other vehicle-specific publications. This is probably why they did it the way that they did. As for you or your dealership to interpret why they didn't do it some other way, well, I think your dealership had better do something complex like calling someone at Toyota and find out instead of speculating as you and they are doing.

Stop speculating and get some documentation. Otherwise, you have little credibility with the engine numbers specifically listed in the TSB. This sort of negates any speculation.

Post any communication you get on Toyota letterhead related to this TSB. That is the only information that is relevant to this discussion.