54 Blue Flame
Retired
Joined: Feb 2021
Posts: 624
Likes: 160
From: Houston, Texas
Good morning. Of you two questions I would say any flat tappet cam I would add a zinc additive or an oil with the high zinc oil already in it. The lead fuel additive question may be more controversial, as I heard arguments for with and without. The way I look at it these old engines were designed for certain specifications, and I try to keep what they wanted. If I have to spend a few dollars more to do it, I figure cheap insurance to avoid large maintenance bills down the road. Cheers. Mark
Race Director
Joined: Feb 2007
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From: northern california
C2 of Year Finalist (track prepared) 2019
Le Mans Master
Joined: Dec 2009
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From: Plano IL
2026 Corvette of the Year Winner - Unmodified
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No - I dont
No - I dont - but I do when I break one in
I use Valvoline VR1 - 10w30 - It has a high level of zinc
No - I dont - but I do when I break one in
I use Valvoline VR1 - 10w30 - It has a high level of zinc
