For all you old BITOG salts, my apologies, but here's another thought concerning the debate about 5w-20 viability. For years, Honda and Toyota have built engines that have different empahsis (Toyota usually leaning to maximizing torque, Honda going for high rpm horsepower, etc.) but are still similar in physical build philosophy. They are generally tight clearance, high-precision machines with low tolerance for deviation. Doesn't it seem that, at least in theory, both mfr's engines would be prime candidates for the use of 5w-20 oil? Doesn't Toyota have all the more potential motivation to bend in the CAFE wind? They've got V-8 Land Cruisers, Sequoias and Tundras, 4-Runners, and Tacomas, which have no fuel swilling counterparts over at Honda (except perhaps the Pilot). So why has Honda gotten on the 5w-20 bandwagon, while Toyota has not? One thought I had was that perhaps Toyota is being ultra conservative after its V-6 sludge "scandal," and is letting others jump in the pool first to see how it goes. I'm tossing this one out just to generate further discussion on this complex topic, as opposed to looking for concrete definite answers (unless we've got any "insiders" willing to step forward... . What do you all think?