Which 5W30 Dino Usually Most Shear Stable

Islander · Mar 18, 2005

Which 5W30 dinos (excluding Havoline and Chevron) most frequently stay in grade for 3000 miles with about 40% to 50% short trup driving?

JohnBrowning · Mar 18, 2005

Zero non-synthetic 5W30!

Idrinkmotoroil · Mar 18, 2005

I've had good luck with Castrol GTX staying in grade, even in a turbo application. Plus it has moly.

Drew99GT · Mar 18, 2005

Castrol GTX, no question is the most shear stable dino.

NewGuy · Mar 18, 2005

I have had good luck with Castrol GTX staying in grade too. I run the 5W30 with good results.

ToyotaNSaturn · Mar 18, 2005

I wish we could see some UOA's of Citgo's dino and the 10w30 Delo products. They would probably be quite shear resistant as well.

BlazerLT · Mar 18, 2005

Yea, I swear by Castrol GTX.

Great conventional oil.

Buzzsaw · Mar 18, 2005

Pennzoil.

haley10 · Mar 18, 2005

quote:

Originally posted by JohnBrowning:
Zero non-synthetic 5W30!

That's kinda what getting the API "Starburst" was all about with SL and before. SM is making it more difficult to get.

I agree GTX seems to maintain viscosity better than most.

Drew99GT · Mar 18, 2005

quote:

Originally posted by Buzzsaw:
Pennzoil.

I like Pennzoil a lot, but it THINS. No question about it, look at all the alayisis reports. Pennzoil, Havoline and Chevron all thin pretty good. Do I still use them, YES!

haley10 · Mar 19, 2005

FWIW, back in the SL days GTX 10w30 had a noack volatility of 8.93, which is about the same as M1 10w30. Not too bad for a dino. Didn't do very well in the TFOUT test though, so I don't try to run it too long. Pennzoil and yes, even Valvoline have much better TFOUT #'s.

[ March 19, 2005, 12:36 PM: Message edited by: haley10 ]

Which 5W30 Dino Usually Most Shear Stable

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