These old heads are already permeated with lead. So an additive is not need. It is more important that you use the correct high octane fuel.
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Junior Member
I have a 69 Riviera 430, should I be using a lead additive?
Baldy
These old heads are already permeated with lead. So an additive is not need. It is more important that you use the correct high octane fuel.
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Steve B.
67 GS 525 Buick Stage IV
66 GS Convertible
65 GS HT
63 Riv
02 Subaru WRX Turbo
03 Ford Cobra Convertible (Factory Supercharged)
When I had my 1964 Riviera I would mix in 5 gallons of 100 Octane LL Av Gas with high octane premium and that would really perk up the performance.
Airy Cat
1954 41D
1955 46R
1956 63D
1998 Jeep Wrangler
2007 Corvette Coupe
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