TxVet33
Full Access Member
Valvoline Restore & Protect started last oil change at 109K miles.... We shall see....
What brand name oil
- Thread starter Brooks23
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wjburken
Supporting Member
Well…..since the OP was last seen here 4 minutes after starting this thread, I’m guessing they lost interest.
Congtoid
TYF Newbie
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I am using valvoline R&P since my truck has 104k miles. I have tried Rotella T6 Multi vehicle 5w-30, regular pennzoil, Amsoil OE series. I couldn't really tell a difference between the 4 brands, but do some more research on which additives the brands use and which ones you need, and pick from there.
swathdiver
Full Access Member
Well, I might as well regurgitate my preferences! LOL
I'd been using M1 since the 1980s, even proved those old commercials of them draining the engine of oil and they kept running. Sometime around 2010 M1 quit being a Group IV oil.
I noticed in my first two trucks that they would rattle a lot on start up with M1. After the 4th oil change I sent in an oil sample for analysis. Then switched the trucks over to ACDelco's full synthetic (5W30). No more rattle. After the 3rd or 4th oil change another sample was sent to Blackstone Labs to compare the two.
M1 had a lot more metal in the oil compared to ACDelco and the latter didn't cause the motor to rattle on start up, no more oil usage between changes and a slight improvement in mileage.
Several years later ran the same tests comparing ACDelco and Quaker State Full Synthetic and surmised them to be essentially the same performance wise. You be the judge, here are the oil analysis:
The Sierra's comparison is between ACDelco and Quaker State Full Synthetic:
On the Yukon's analysis below, the 2018 and 2019 oil samples are Mobil 1, ACDelco for the other three.
It is my opinion that what makes these oils better than M1 is their rating under ASTM D445 where their viscosity numbers are over 11.5 (100 degrees centigrade) or 66 and above (40 degrees centigrade).
I'd been using M1 since the 1980s, even proved those old commercials of them draining the engine of oil and they kept running. Sometime around 2010 M1 quit being a Group IV oil.
I noticed in my first two trucks that they would rattle a lot on start up with M1. After the 4th oil change I sent in an oil sample for analysis. Then switched the trucks over to ACDelco's full synthetic (5W30). No more rattle. After the 3rd or 4th oil change another sample was sent to Blackstone Labs to compare the two.
M1 had a lot more metal in the oil compared to ACDelco and the latter didn't cause the motor to rattle on start up, no more oil usage between changes and a slight improvement in mileage.
Several years later ran the same tests comparing ACDelco and Quaker State Full Synthetic and surmised them to be essentially the same performance wise. You be the judge, here are the oil analysis:
The Sierra's comparison is between ACDelco and Quaker State Full Synthetic:
On the Yukon's analysis below, the 2018 and 2019 oil samples are Mobil 1, ACDelco for the other three.
It is my opinion that what makes these oils better than M1 is their rating under ASTM D445 where their viscosity numbers are over 11.5 (100 degrees centigrade) or 66 and above (40 degrees centigrade).
Last edited:
Marky Dissod
Full Access Member
SOME of Mobil 1's motor oils are Group4 synthetics, others are Group3.
Group3 is just hydrocracked de-paraffinated extra virgin fossil marrow with impurities minimized.
Castrol lobbied for this definition, by the way.
It's why I stopped using any / all Castrol after they stopped making their green oil, their last Group4 synthetic.
Group4 (what normal people consider synthetic) is motor oil entirely synthesized in a lab from synthetic ingredients.
Group3 is just hydrocracked de-paraffinated extra virgin fossil marrow with impurities minimized.
Castrol lobbied for this definition, by the way.
It's why I stopped using any / all Castrol after they stopped making their green oil, their last Group4 synthetic.
Group4 (what normal people consider synthetic) is motor oil entirely synthesized in a lab from synthetic ingredients.
