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.