quote:

Originally posted by kandiapple66:
If you are using your 'bird for normal cruising, the Sunoco fuel is probably just fine. If you were towing a trailer or boat then a lead additive might be helpful. I can't vouch for that because I don't use it in my 'bird. Check your initial igniton timing and adjust to 10 degrees BTDC with the vacuum advance temporarily disconnected and the line plugged. Sunoco is not available where I live but if it were, I'd try even bumping up the timing a bit. If you don't experience any pinging, another couple of degrees of intial timing up to about 5 max. will give you a bit more performance. In any case, avoid retarding the timing if you can. Late ignition timing will raise average cylinder temperatures and sometimes result in engine damage, not limited to valve recession/burning, and other problems. BTW, I have been driving my '66 since April of 1966, no burned valves yet.