really cool 70 Z28..simply the best.

**Tracker1** · #1 04-16-2009, 02:55 AM

What about GM Engine Oil Supplement (EOS). I understand it is high in Zinc. It better be, I'm using it in my Chevelle.

lzdick · #2 04-16-2009, 03:13 AM

[ QUOTE ]
What about GM Engine Oil Supplement (EOS). I understand it is high in Zinc. It better be, I'm using it in my Chevelle.

[/ QUOTE ]

Both Jeg's and Summit Racing sell EOS (#88862586) for $19.95/pint. That's is double what ZDDPlus goes for...and the zinc content is lower as well.

Chateau Slate 66 · #3 04-16-2009, 03:50 AM

Several of the oils from Amsoil meet or exceed the zinc/phosphorus levels necessary for flat tappet engines without any extra additives.

link to service bulletin

**Charley Lillard** · #4 04-16-2009, 05:12 AM

I didn't say "can I buy it" :-)

Andy · #5 04-17-2009, 05:38 AM

I run valvoline racing VR1 10w30 oil and a bottle of comp cams break in lube in my 406 as per my builders recommendation. I've got one of the xtreme energy hydraulic flat tappet cams in it with the high ramp rates/spring pressures and he said that was the best prevention for wiping a cam lobe. As others have mentioned, I would not run a synthetic oil.

MJwrabbit · #6 04-21-2009, 06:24 PM

Truly amazing!
Thanks for all the pics. Solved some mysteries for me!

**Charley Lillard** · #7 04-21-2009, 06:38 PM

Thanks...That was the idea behind the site.

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