FAKE! av gas is usually 100LL witch is 100 octane and LL stands for low lead, and they put lead it the gas to help prevent pre-ignition or detonation in piston engines for aircraft! unlike regular fuel for cars. also av gas is usually blue sometimes green and has a slightly different smell!!

To all you guys screaming fake didn't you read the FML rules? Please stop screaming fake just stfu read and move on if you don't like it.

It may be fake but PEOPLE ENJOY THE HUMOR OF THIS SITE!!!! That's what it was made for, humor! FYL though op

Just but some sugar in the tank of ur grandpas plane see how he likes that when he's out flying around

this reminds me of the family guy episode where peter tries to be a redneck and siphons airplane fuel into his truck in hopes of flying. lol

it's csi man, everythings real.

ok #16 depending on the wear on the engine yeah and how he drive yeah it could cause a piston to blow through the engine wall jet and racing fuel...different. regular car engines arent meant to have that kind of fuel pushed into them without the right mods and upgrades. maybe when the op said his engine "blew up" he meant he blew a seal. ******* assholes...give the guy some credit. so what if he grabbed the wrong can labled jet fuel and blamed it on his grandfather

Complete bullshit. Avgas primarily is simply dramatically higher-octane than standard gasoline intended for automobiles (and tends to be well over 100 octane). It'd be LESS likely to 'blow up' and more likely to simply sputter and die in an engine not built/tuned for it, as octane is the measurement of KNOCK RESISTANCE, not combustability. It's how well it *resists* premature/spontaneous ignition (knock), not how well or clean it burns, or how much potential energy is in the fuel. You get *lower* gas mileage with higher octane, as it takes more fuel to produce the same amount of power... the trade-off being that it's more stable and predictable under extreme conditions, allowing a performance engine to be tuned to tighter tolerances. In addition, pure methanol/ethanol requires a 20% richer fuel/air mixture to burn properly... and most of the 'damage' caused is due to the fact that alcohol burns cleaner (doesn't leave deposits like gasoline does, which help seal up failing gaskets) and is anhydrous; with cheap seals it can literally suck the moisture out and denature them. In any case, in a standard engine it AGAIN would simply sputter to a halt and die, no explosion. The only way this would 'blow up' is if he had a diesel engine and got the wrong can and put gasoline in. Then it'd go off pretty spectacularly. And pretty damn fast.. it wouldn't run better, then pop.