07-06-2010, 08:10 PM
|
|
Senior Club Cobra Member
|
|
|
Join Date: Jul 2002
Cobra Make, Engine:
Posts: 15,712
|
|
Not Ranked
Interesting question El, I have never used any straight weight oil, 40 or 50 or whatever so have no personal knowledge of what the difference might be. Generally speaking, I would think most 40 or 50 wt straight weight oils would be a "racing oil"? As such, it is unlikely they contain any cleansing additives, which means if they are not changed often and soon it will lead to "gunk" and nasty stuff inside the engine.
This I know from personal experience having worked on a few motors where the owners only used "race" oil and changed it just like any other oil, not nearly often enough!!! Substantial crud build up was found in the engines on tear down for various reasons. The most severe case a 454 Chevy SS truck that was used to tow a race car. The truck itself was never raced, he just used the same oil as he did for the race car. But he changed the race car engine oil pretty regular, unlike the truck. It was SO nasty, he went with a crate motor to replace it.
|
Threaded Mode
