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Search: Posts Made By: rotorwrench
Forum: Late V8 (1954+) 04-12-2021, 12:41 PM
Replies: 46
Views: 3,504
Posted By rotorwrench
Re: oil with out zink

The "break in" oil that is used in aircraft engines is straight mineral oil with no additives. I don't think a person with a high performance engine would want to use that. I've never used any...
Forum: Late V8 (1954+) 04-06-2021, 09:55 AM
Replies: 46
Views: 3,504
Posted By rotorwrench
Re: oil with out zink

I don't know why folks bring this old stuff back up. There must be more than a few other threads about this and many more on other forums. Folks can be told by an expert (of which I am not) that the...
Forum: Late V8 (1954+) 05-15-2020, 09:39 AM
Replies: 46
Views: 3,504
Posted By rotorwrench
Re: oil with out zink

Anything more than 1200 ppm starts to become detrimental to the engine parts. This was where the API set the limits for good reason (for automobile engines). ZDDP has corrosive properties so don't...
Forum: Late V8 (1954+) 05-09-2020, 07:06 AM
Replies: 46
Views: 3,504
Posted By rotorwrench
Re: oil with out zink

The ZDDP was not completely removed. It was just reduced. The higher performance engines of the late 50s through the early 70s needed 1200 PPM of ZDDP for better longevity of flat tappet valve train...
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