5w-20: Are there any countries where ...

[seth_man]

wierd thing is that toyota like every other manufacturer continues to reasearch after a car hits the market. 5-30 was recommended, now 5-20 is recomended. im sure toyota would rather spend the small amout of money on a tsb than lots to recall everyones oil caps.

[1stToyota]

Originally Posted by seth_man

wierd thing is that toyota like every other manufacturer continues to reasearch after a car hits the market. 5-30 was recommended, now 5-20 is recomended. im sure toyota would rather spend the small amout of money on a tsb than lots to recall everyones oil caps.

Yes, the TSB allows the addition of 5w-20, right below the note about it being better to stick with what is stated on the oil cap, owners manual and service manual.

[TheSilkySmooth]

Originally Posted by 1stToyota

Yes, the TSB allows the addition of 5w-20, right below the note about it being better to stick with what is stated on the oil cap, owners manual and service manual.

I would hazard that not One engine designer in the automotive industry would tell you an engine will run properly on 20W or 30W. Never can clearance the engine for both weights or insure the engine would not have harmonic resonances which would eventually tear itself apart. Yamaha design the engine NOT toyota, the yamaha guys are probably incensed about that mal-thought TSB. If your engine is noisy It may be beyond recuperation, you see, the pistons will have become radiused along the travel direction of the skirt and will continue to rock in the bore at each throw causing this rukus of klattering. Mr. GID please tell me if the engine has resumed proper operation when going back to the shell "synthetic".