Additive

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swedefish

swedefish

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How many of you guys use zinc additives in your engineoil after the breakin?
 
I admit i dont, although i havent rebuilt the motor yet, i did use some Motorcraft (yes, its true) Diesel 15/40 oil the other day for a oil change, Walmart was rolling back prices, woot, they were out of most of everything else.
 
I would reccomend zinc additive to anybody who still has a flat tappet cam (either hydraulic or solid) There are only a few oils now-days that have enough zinc to keep a cam alive. Zinc was removed from diesel oil a while back so 20/50 won't help. Most racing oils still have it but most of us don't need 20/50 or straight 50 in our street cars. Mike
 
I don't I use oil that already has it. that way I know the amount and that it is always the same. Oil manufacturers don't like when you add stuff to their oils and change the recipe.They spend millions on R&D so why would I think I could do better? (my $0.02)
 
Thanks guys.
I don´t have that many hours in the motor yet, I´ll have to look for a additive or better yet an oil that include the zink.
 
Well, after wiping a couple of cams, I am now using comp cams additive with every oil change. If I wipe another one, I'm going roller.

Jack
 
the diesel still has about 1200 ppm but down from about 1400. so its still ok to use in engine with light spring psi, but i would add something if you have a double spring or use a race oil.
 
this oil supplement was recommend to me
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EL5DEMON340 said:
the diesel still has about 1200 ppm but down from about 1400. so its still ok to use in engine with light spring psi, but i would add something if you have a double spring or use a race oil.
Click to expand...

Most all diesel oils have an API rating for auto use too. If you buy a diesel oil with an SM rating then it only has a max of 800 ppm, the current multi-weight Rotella T is SM rated.

The only sure way to ensure a certain level of ZDDP in your oil in excess of the API service rating limits is to get a specialty oil that DOES NOT have an API serive rating and advertises ZDDP levels. Regardless of what the marketing label on the front of the bottle states it's the API serive rating that is going to determine the ZDDP level. The EPA monitors this and the fines to the oil companies are significant if they are violated, the marketing folks that design marketing labels on the front of the bottle and make claims aren't held to the same accountability.
 
Royal Purple has 1300 ppm and there racing oil has 1800 ppm ($16.00/qt) 1100-1200 should be fine for a street engine. I'll have to check into that Summit oil, that sounds like a good deal.
 
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