Valvoline Restore & Protect cons?
- Thread starter Dave1027
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Below 3.5 cP
5W30 VRP has a HTHS of 3.2 which isn’t bad.
No but it doesn't seem very shear stable, and combined with fuel dilution I see it dropping well below 3.0 in use. If it was shear stable I would be content with 3.2 cP
It's a RC API SQ oil so it's not going to be as shear stable as a Euro ACEA A3 oil. It behaves similar to Mobil 1. Fuel tends to cause it to dip into 30 grade territory. Amsoil SS back in the day used to have a HT/HS of 3.5 but they lowered it over time to help with FE. Now their 30 grade SS line only has a HT/HS of 3.0-3.1.
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Well that would be entirely dependent on the amount and type of VM used in the product. Have we seen reliable tests on here that show actual mechanical shear of the VII? Perhaps there are, I just don't recall seeing it.
Good point. You're right it's not often from mechanical shear. I would guess that it's the type and amount of VM that causes the viscosity to dip. I really think it's more fuel related most of the time vs mechanical shear.
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3 season use, I'm considering substituting two quarts MaxLife 10w-40 or 1 quart 20w-50 into a six quart fill.
I'm on my fourth run of 5w-30 VRP, so this would be maintenance not full cleaning effective strength.
I'm on my fourth run of 5w-30 VRP, so this would be maintenance not full cleaning effective strength.
I found it interesting that Eric on YouTube "I do cars" recently tore down an Audi DI 3.0 turbo. The inside of the engine looked pristine, except for the oil control rings. These cars are typically run on ACEA C2 - VW 504/507 approved oils which is why it probably looked so clean inside overall. It's the carbon build-up in the ring land that seems to be the problem which is where VRP does its magic. The challenge for Euro car owners is VRP is not a Euro approved oil at this time.
For years I thought when I saw engine internals looking clean all was fine. Clearly not the case as you've stated. The rings are what take a beating and get deposit buildup over time.
It's an oil designed to specifically remove that type of carbon deposit.
Where have you seen that it isn't shear stable?
FE = federal emissions?
Fuel Economy.
Every UOA shows this, viscosity drops more than it would/should from the detected fuel contamination.
Detected by whom? Blackstone?
Well that could be self propelled catch 22. How did the rings get dirty? How did the motor oil shear?
All of them, though I don't consider blackstone fuel dilution figures.
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