have SN dino oils closed the gap with synthetics?

[dave1251]

Originally Posted By: Rosetta
Originally Posted By: Shannow
Given the amount of sludge I saw in engines run exclusivly on SE/S with 3,000 mile oil changes, then YES, I di believe that the current oils are markedly better...



A quote not quoted again!
You mean synthetic SE with too much sludge at 3,000 miles? Not what pop Sicence showed in april 1976. Sludge wasn't a problem for synthetics since then. I think you saw a lot of sludge from Mineral oils. link above


PAO will sludge. It was prone to sludge in 1976 also.

 

[Garak]

Exactly. It might resist coking far better than conventional, but you overload the dispersant package or blow away the TBN, it won't matter what the base stock is.

 

[Rosetta]

Sure, then and now. But 3k miles sludged engine with synthetics ... I don't buy it that EZ.

 

[kschachn]

What?

"Prone to sludge"?

Originally Posted By: dave1251
PAO will sludge. It was prone to sludge in 1976 also.

 

[Brian Barnhart]

According to the organizations established by the oil companies and automakers (SAE, API, and ILSAC) there is no difference of necessity between conventional and "synthetic".