WARNING! DANGER! If you are or will run a flat tappet cam read this!!!

[firefighter3931]

Good info Mic.....thanks for posting 

That Penzoil GT 20/50 looks impressive !


Ron

[Ghoste]

I'm wondering if the formulations are changing faster than that list though?

[mally69]

Wow, it shows BradPenn being the lowest. I thought theirs was supposed to be one of the top choices for flat tappet cams? 

[Plumcrazy]

I stumbled on this web site/product. A lot of interesting reading.

http://www.zddplus.com/index.htm

Anybody use it?  Thoughts, opinions.


Another possibility

http://www.castrol.com/castrol/genericarticle.do?categoryId=82915470&contentId=7032644

[daves68]

Zinc additive was removed from motor oil last year because it was suspected of fouling catalytic converters and thereby allowing more pollutants to pass out of the engine. My question would be that we have been saddled with cats since 1975. Why did they just start failing because of oil/zinc last year? Smell a rat here. Thank the next tree huggin, tofu fartin, enviro twink  liberal that  you see.
Dave

[Chryco Psycho]

yup trying to get all the old cars off the road & force us to buy new with no $$ as the raises are nowhere close to keeping up with rising costs

[Wango Mango]

Check out www.bobistheoilguy.com   its quite a site dedicated to lubricants & there's a wealth of info on the passenger car rorum & racing forum.  I switched to Brad Penn 1 Racing Oil (the real 'green' oil that used to be Kendall GT1).  It has 1300 ppm of zinc & lots of phosphorus.  Valvonine VR1 is also high in zinc & highly rated.   Some tests they did that are on the site don't recommend additives since they compromise the formulas that the oils were designed with.  Check out the website.

[racecharger]

I have a .645 roller in in my stroked 496.
Do I need zinc in my oil?
I have run my engine for about one hour to brake it in.
And I will take it to the Dino soon. 

I have used a Mobil 1 15-40 diesel engine oil so far.
What do you think?

[daves68]

No, you don't. A roller cam set-up will not be affected by the zinc removal. The stresses on a roller are waaayyy less than those on a flat tappet.
It's only "flat" guys that have to be concerned.

[Ghoste]

Check out www.bobistheoilguy.com   its quite a site dedicated to lubricants...             ... Some tests they did that are on the site don't recommend additives since they compromise the formulas that the oils were designed with.  Check out the website.

The only additive test I could find on that site was adding Lucas gear oil additive to a gear oil and one motor oil.  That didn't seem too conclusive other than for Lucas.   Is there more?