premium gas

i kno this isnt mustang specific. but i usually post here.
i kno that premium gas burns better and what not, but is it true that it actually lasts longer? someone told me that it uses less or something which curious about, it seems that the injectors would use the same amount. whatever. if anyone knows about this it would be greatly appreciated.

You have just asked a very simple question with a very complicated answer.

But to keep it short, unless your car explictly says Premium Gas stick to mid and low octane gases the premium wont help in many cases it will reduce fuel economy.

I second that, if your car is tuned for the cheap stuff, higher octane will hurt your milage.

Yep, I 3rd that. What I've actually heard is that say your car is tuned for 87 but you've been running 93+, it may give you marginal higher MPG but the long run can really make your engine get a lot of carbon build up. Yes, higher the octane, the slower the rate of burn. That's why higher compression engines use higher octane.

FYI, in my Silverado I usually run 87 or 89
in my Neon SRT4 I run 93-94 because it says I need to run premium.

yep lower octane is actually more explosive, run the lowest octane that is recommended for your car.

i use regular. but my friend who has a 98 vw gti 2.0 (naturally aspirated) puts premium in that. so i was kinda wondering for her.

Please visit www.howstuffworks.com and search for "octane" to get a good answer to your question. I too explored the same question and found that octane rating is simply how much pressure the fuel will resist until it ignites under that pressure. Higher octane doesn't equal faster burning or more horsepower by itself. The only reason we confuse horsepower and higher octane is because those engines with a higher compression ration MUST have a higher octane. Otherwise, as the fuel is compressed, it would ignite under the pressure prior to when it was intended and at minimum, cause the knocking sound we've all heard when our engines are under a load...at worst, it can tear you engine apart. Anyhow, go to the website and read for yourself. Enjoy.

thnaks for the site. that actually .explains quite a bit

Yep, the higher the ocatane the longer it takes to burn.