2006 Chevy Express 4.8L bought used consuming a normal 1 quart per 5,000 miles. After 12k of Valvoline Restore and Protect total and a few short changes the current 5k interval of Valvoline Restore and Protect has lost 1/5 th of the normal range on dipstick so what is that, a smidge more than 1/4 quart in 5,000 miles? Impressed. 215k total.
Valvoline Restore and Protect
- Thread starter Scott S
- Start date
Maybe if enough of us email Valvoline requesting a 40 weight of some kind we can push the needle a little bit 
I emailed today got the canned answer of "we have not been made aware of any plans for a 40 wt version, but will pass along your feedback".
I emailed today got the canned answer of "we have not been made aware of any plans for a 40 wt version, but will pass along your feedback".
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- Feb 4, 2023
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I've tried 5w-30 this past summer. Engine just felt sluggish. Besides, I've never seen a bad UOA with 0w-20 with these engines.
If you usually run 0W-20 and then switch to 5W-30, the engine always feel sluggish because the thicker oil takes out part of the momentum of the engine. Ask me how I know.
You cannot run thicker (higher viscosity) oil and expect your engine to rotate the same way as with thinner (lower viscosity) oil.
Some people on here is gonna get heat up regarding this..
CleanSump
Site Donor 2026
Is this going to start another motor oil in your carry-on thread? 'Cause I ain't gonna read it.
4wd
$50 site donor 2026
Everything in my signature - is a 20 gone 30 …^^^ Can only go up a grade if the engine puts out more than 10 HP.
Perhaps I need Wrangler jeans to calibrate my dyno
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yea, i know. and it's spec'd 0w-20 and says so on the oil cap. but you know how that goes on BITOG...
i even looked up the bearing clearances and a chart for oil weight/clearances. Says I should be running 0w-20 or 0w-16 lol.
It has really helped my kid’s 2.4L Kia with its oil burning. I did a few piston soaks with the ACDelco stuff and put it on a strict diet of 5W-30 R and P. Her oil consumption has dropped in half from what it was. That engine also has a design issue, but the warranty has long passed. I’d run that 10W-40 stuff if we could get it here in there, probably help even more!
You are gonna get shot so armor up!
Bearing clearances on factory made engines have been about as tight as they can go for decades. If they were any tighter they'd over heat and burn up regardless of viscosity. Tight bearing clearances can operate on higher oil viscosity just fine. If they couldn't every engine started up in the winter would destroy itself. Tight bearings still gain more MOFT with thicker oil, but looser bearings can actually lose MOFT if the viscosity is too low. You don't want to run too thin oil in a race engine setup with loose bearing clearance.
Another good example is the Ford Coyote, which has some pretty tight bearing clearances for the power it makes - see chart below. Having a bearing clearance of 0.001 inch (the main bearing tight side of the acceptable range) on an over 2.5 inch journal is a tight clearance. It can run any viscosity (and Ford even recommends) between xW-20 to xW-50. Like on any engine, the W ("Winter") rating needs to be right for expected cold start-ups. Even an engine that "specs" a 0W-16 could run a xW-40 or xW-50 if the W rating was acceptable.
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I'm in Perth Australia and have seen the 10w40 for sale here, but getting it to USA... I think will be very costly, perhaps prohibitive... depends how badly someone wants to experiment!
Do me a favor, can you get me the 40 Degree c and 100 Degree C specs on this 10W-40 oil.
We want this oil so bad, at least I do, better yet, can you get us a VOA of this oil? If you could get on a Cruise Ship and visit this place here and bring us this oil it would be awesome.
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Is this what you're after? Not exactly sure what you mean by VOA.
EDIT: 'virgin' oil analysis? as in buy a jug and send some unused oil for analysis and provide the results?
I got the above table from this PDF, hopefully the link works.
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Yes, VOA is Virgin oil analysis. It does cost money. @Brian123 would need to pay up.
Motor oil is fine to ship overseas on a ship and even on a plane. It's not considered flammable item/liquid by TSA.
https://www.tsa.gov/travel/security-screening/whatcanibring/flammables
CleanSump
Site Donor 2026
Wouldn't it be a laugh if the Valvoline Restore and Protect were manufactured in the US and someone payed shipping from Australia and tariffs to bring it back to the US?
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