Agree on not needing Aviation gas it in a stock S'bolt engine. Mine does very well on the cheapest, lowest octane non-ethanol I can find. Not to take too much exception with others but back in the early 70's my local area didn't have any really high octane gas. The big city boys could find Sunoco 104 at a few select pumps. The Duster was running a 12 to 1 340 for a while back then and the local airport would reluctantly sell 5 gallon cans of gas (was it 100-130). I really don't recall the mix ratio with regular premium but you could run the timing where it needed to be at track day and still drive it on the street. Fortunately it didn't see many street miles.
Many think high octane gas makes more power and runs cleaner in their older street cars. In fact less power is usually the case if they don't have the compression needed to take advantage of the slower to ignite higher octane fuel. With our trucks I think 85 octane is fine. When just cruising down the road bobtailed, the wife's 6.4, 410 HP (at the tires) hemi truck does fine on 87 octane with it's knock sensors and computer controlled engine.... unless it's going to be working pulling a trailer then it needs/gets the highest octane premium around.
RonR
