Never ending debate - best oil weight

[PPV_2018]

If there's no real answer, it's a stupid question.

respectfully i .disagree. I ask lots of questions, some of which i justify by telling myself there’s no stupid questions

To your point of some oils being worse I have heard certain things about “high mileage” oil being a scam. Also i have wanted to try royal purple, but was told its just overpriced oil, no different than anything else.

If you would care to elaborate on your beef with Castrol (cooking oil?) .. i am interested.

 

[Marky Dissod]

Then I guess we disagree on what I meant by 'no real answer'? I was referring to testable repeatable results.
Unfortunately anything that isn't a Group3 synthetic or Group 4 synthetic is worse,
and very few Group3 synthetics are as good as Group4 synthetics.

My beef with Castrol is that they are chiefly responsible for getting the definition of 'synthetic oil'
legally changed to allow for chemically treated non-synthetic oil to be considered synthetic.
Like saying, if a leather jacket is treated with non-natural chemicals, it's now a vinyl jacket.
So when Castrol substantially changed the formula for their green stuff, I quit Castrol.
If enough of their 0W30 or 5W30 lab tests competitively vs Pennzoil QuakerState or Valvoline, I'll reconsider,
but Castrol is responsible for lowering the bar for everyone.

 

[Congtoid]

I am running 5w-30 Valvoline R&P on my 2016 Yukon with 104k miles. Can't tell a difference in performance yet, but it is recommended by Valvoline to use R&P up to 4 times for best results. I do hear some noises though, I don't know if it's the fuel pump, the lifters going bad, or an exhaust leak. I also used 8 quarts to fill up the engine. I was a bit worried about overfilling, but the oil does not mark over the hashmarks on the dipstick. I might post a link for a video regarding the noises under the hood later.

 

[OR VietVet]

Can I assume that the engine is a 5.3? Likely takes 8 quarts but your manual will tell you and you should already know the oil capacity.

Performance guarantees do not come with Valvoline Protect and Restore. Internal cleaning of engine is what you get.

Best to do the video of the noise and when it happens>

 

[Marky Dissod]

Valvoline Restore & Protect does not come with performance guarantees. Internal cleaning of engine is what you get.

If that screen by the oil pressure sender is partially clogged,
I wonder how long it would take Valvoline Restore & Protect to unclog that screen?

 

[Congtoid]

Can I assume that the engine is a 5.3? Likely takes 8 quarts but your manual will tell you and you should already know the oil capacity.

Performance guarantees do not come with Valvoline Protect and Restore. Internal cleaning of engine is what you get.

Best to do the video of the noise and when it happens>

Yes it is a 5.3. Of course it's too soon to tell in my case, but do you have any experience with valvoline r&p? I want to see the end results to determine if its worth completing the 4 oil changes with the same brand. I've heard good things about napa full synthetic. I think its made by valvoline as well. Any experience with napa full synth? Thanks.

 

[OR VietVet]

Yes it is a 5.3. Of course it's too soon to tell in my case, but do you have any experience with valvoline r&p? I want to see the end results to determine if its worth completing the 4 oil changes with the same brand. I've heard good things about napa full synthetic. I think its made by valvoline as well. Any experience with napa full synth? Thanks.

Look at all the videos at you tube, about Lake Speed, Junior.