0w-20 vs 5w-30?

[cookiemonster]

EDIT: Updating post here.

[Ares]

Good catch. Will look into this in a bit.

[cookiemonster]

For reference ...

[cinder]

I'd stick to what's in the owner manual or stamped on the oil cap . 0w-20 . A 5w-20 synthetic is close . Give Mitsubishi a call and get the okay from customer relations . Have them e-mail or fax the approval of a 5w-20 or other weight for warranty . You can get Pennzoil Platinum 0w-20 at $3 > $5 a quart when buying the 4 or 5 quart jug . They have rebates at their site as well . Go here , http://www.pennzoil.com/fuelrewards/ .

[Daox]

Where does it say 0W-20 is only good to 80F?

I never really understand these things a ton because the engine is water cooled, the oil shouldn't ever get much warmer than the coolant...

[cookiemonster]

Where does it say 0W-20 is only good to 80F?

I never really understand these things a ton because the engine is water cooled, the oil shouldn't ever get much warmer than the coolant...

From what I understand, it's that 20 is designed to 80F ambient temperature, and that it shouldn't be used, say, on an unstarted car parked in 100F weather?

[Daox]

That doesn't make sense though. 0W is the number that matters when the oil is cold, -20 is the number that matters when the oil is hot.

[kalifornia]

I understand these ultra light oils are needed to achieve certain emissions & mpg goals thats all. I also believe you could run straight 50 w in the mirage and you or the car wouldn't know the difference especially in the summer time.

[cinder]

SHELL full synthetic 5w-20 or 5w-30 are very good oils as well . Can get it at $3 > 4 a quart . Here are used oil analysises ( U.O.A.s ) for the '08 Yaris sedan we had . The Shell synthetic 5w-20 or 5w-30 should be good up to a 7,500 mile interval . May need to Zoom in for better look .

[cinder]

Just added the used oil analysises above . The PENNZOIL is from the same producer as SHELL , a.k.a. S.O.P.U.S..