SuperTech Full Syn 20 weight 7461 miles 16 Silverado 4.3 V6

[Mad_Hatter]

It's not a bad report per se. Keep in mind that it's 7500 miles so the wear metals will be slightly higher than you might normally see on a UOA. If the other wear metals were higher than avg than I'd be more worried about the copper and since coppers a soft metal it's not as damaging as having chunks of Fe floating around.

I think BS is right, watch for trends in your other metals. If they start to go up you've got a problem developing. Be curious to see a UOA after an equally long run on a Xw30.🤔

 

[JohnnyJohnson]

Yes and those figure are right in line with what I'd expect to see coming from a Chevy block.

 

[wemay]

Originally Posted by dave1251
Report is fine but I would still use the recommended grade. If GM could use a 20 grade and get the additional CAFE credits I'm sure the company would.


Even though the report does look good,
I agree with above.

 

[tblt44]

Originally Posted by diyjake
I would never use thinner oil than recommended.


Yep.
If I wanted a lighter oil I would look at all the oil specs and just run a thinner 5w-30.
I think penzoil and valvoline syn are on the thinner side where mobil 1 and QSUD are on the thicker side.