A friend of mine many years ago put a can of starting ether in his old Plymouth. That thing ran like race car for that tank of gas, then promptly fell apart.
I was in a Wal-Mart back around 1988 and noticed they had model airplane fuel on clearance. It was marked down a huge amount, I think to only 15 cents per pint.
I noticed it said “now with more nitro”. I didn’t really know anything about it but thought that it would maybe help my pickup run well.
I got 12 cans and put six in my 86 F250. The engine was a 460 but I had done several things to improve performance.
Anyway to make a long story short, it really did smooth the engine and it also had more power. I could also smell a sweet sort of smell even in the cab.
I had a ‘54 Chrysler Newport New Yorker Deluxe. A Hemi with a tiny single throat carb. Cool car though!