In the states, almost all cars use unleaded fuel and the majority of light trucks do, too. Most deisel vehicles in the states are clearly marked as such somewhere on the body. If you stick to cars, there's very little chance of "getting the wrong type". Now if you're trying to find high octane fuel, just buy a bottle of octane booster, though I question how you can afford the car that needs it yet not the gas.

I spend over $350 a month in gas, and about $300 in car bills. It's really not that hard :(

Yeah, and siphoning is easy, but illegal. You can be charged with a felony if they want to throw obstruction of property along with theft. It's really not worth it, just skip McDonalds on the way home and you'll be fine.

Oh, and the thing about Octane Boosters is that they don't work. It's as simple as that, you would need about 15-20 bottles per tank to even make the volumeric efficiency change in octane for your liking. The only real way to get higher octane gasoline is to purchase it after it has already been brewed, or brew your own gasoline with the right mix of methane and other addatives.

2 Words:

Fuck, That.

The point of an octane booster is to boost the octane rating. The reason to do this is to prevent knock in high compression engines. In fact, most octane boosters contain alcohol, which is already partially oxidized. Using an octane booster actually reduces the energy density of the fuel, but allows higher compression.

You're preaching to the Choir..WW. I'm saying, they don't work in reguards to making your octane rating higher, hardly in fact do they allow higher compression, for what you pay it isn't even worth bothing with it. And if you're experiencing knock, trying to use an octane booster solution isn't what you need to solve your problem, but rather a quick fix..

No, they do boost your octane level, and they are the right solution if your problem is that your engine was designed for high-octane fuel. They don't, however, make your gas any more powerful; the only reason to use an octane booster is if your engine was designed for higher octane fuel than you put in it.

That's where I'm getting at.

Yes, but like I said above, it's basically a waste of money. I seen on mythbusters that the common $4-5 bottle that "treats one tank of gas" only changed the level of the octane from 87 to roughly 87.4, and on another test with a small volume of gas it only went up to 87.9, so back to my orignal point you'd be better off getting the correct gas to begin with, or you'll need to purchase a few bottles of this.