finally found the 5w-20 TSB...

[R2D2]

Originally Posted by bronsin

How long until people feel the need for 0W-0 oil? or even, -5w-0 oil?

It won't end at 20wt, of that I am certain. I'm quite sure 0W-10 would work well in a lot of current engines out there-but it's not recommended or even obtainable very easily. Lubrication technology is evolving quickly right now-nano technology and biobased products to name a couple-and making thinner oils possible that increase efficiency and lower wear.

Your post above highlights the fact the SAE method of classifying oil viscosity is rediculous! It is antiquated and confusing to most-time for a revamp in my opinion. But yes thinner oils are coming!

R2

[1stToyota]

Well, when they get here I think that'll be the day I opt for a German sedan w/ a nice turbo diesel that won't want oil the consistency of kerosene in their expensive motor.

[craigq]

Originally Posted by R2D2

I'm quite sure 0W-10 would work well in a lot of current engines out there-but it's not recommended or even obtainable very easily.
R2

Get a hold of a Redline dealer
Redline 0W10 oil

Disclaimer: it's not recommended by Toyota, will void warranty, meant for racing, yadda yadda yadda...