Motor oil info

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Seattle Sam · #1 04-02-2006, 11:30 AM

The Pennzoil 25-50 GT has NO zinc listed on its data sheet, and claims to be compliant with the current API SJ standards.

**Salvatore** · #2 04-02-2006, 05:07 PM

So what oil is good for us to use in our street motors. I have always used Castrol 10w-40. No good anymore?

Belair62 · #3 04-03-2006, 05:19 AM

This is supposedly a real concern on engine/cam break in...but I use Valvoline Racing all the time which has a good amount in it..GM engine oil supplement also is supposed to have plenty of zinc but don't quote me on it.

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