2007-10-21 12:57:22 · 14 answers · asked by Anonymous in Cars & Transportation ➔ Maintenance & Repairs
I thought ALL fuel was now un-leaded?...however no harm will come from using upgraded fuel...but may not be true of downgrading...
2007-10-21 13:04:29 · answer #1 · answered by djave djarvoo 'djas originel 5 · 0⤊ 0⤋
Since the mid 70's all fuel is unleaded. The only difference now between regular and supreme is that supreme has a higher octane rating, which means that it is a better fuel. It won't hurt a thing to run it in your car. In fact, if your car pings of knocks with regular grade fuel, you should be running supreme in it anyway.
2007-10-21 13:02:50 · answer #2 · answered by randy 7 · 0⤊ 0⤋
Nothing. You just waste money. Premium fuel is unleaded too. Premium is used because it has additives which prevent "pre-ignition" in high performance cars. That is all it does. Unless you have a high performance car, premium will not make any difference. (Pre-ignition is caused by pre combustion caused by high combustion (read as: "high pressure combustion"), causing the fuel to ignite. The gasoline ignites because it's under high pressure. The additives in premium prevent this from happening.
Only cars which have high combustion pressure will pre-ignite. And only high performance cars will produce a high combustion pressure). Use whatever the car manual says. If it says premium, then use premium. If it says regular, then use regular. Using premium in a car that only needs regular is a total waste of money. PERIOD!
2007-10-21 18:01:03 · answer #3 · answered by MrZ 6 · 0⤊ 0⤋
premium is unleaded, all gas now days is unleaded that you get at the filling stations, if your car calls for regular unleaded and you use premium unleaded you are just wasting your money.
2007-10-21 13:09:50 · answer #4 · answered by mister ss 7 · 0⤊ 0⤋
Nothing really. The fuels are compatible, but you may notice a difference in performance. The computer and knock sensor will adjust for the difference in octane usage. For best results, go by what your owners manual recommends. If the manual says lower octane can be used, with out harm, go for it and save on the price difference between the octane ratings.
2007-10-21 13:16:41 · answer #5 · answered by Anonymous · 0⤊ 0⤋
You can not purchase leaded fuel anymore.... all different grades including premium are unleaded...
2007-10-21 13:14:02 · answer #6 · answered by RiverRat 5 · 0⤊ 0⤋
You waste about five cents a gallon. Premium is also unleaded.
2007-10-21 13:02:42 · answer #7 · answered by Rolf H 1 · 0⤊ 0⤋
There are spme that swear that a tank of premium every so often makes their car run better. The bottom line is that if your car dosen't require premium, then why spend the extra $ on it. Unless you drive a high-end sports car, (that requires premium) your engine will not see any benefit.
2007-10-21 13:02:10 · answer #8 · answered by Daremo 3 · 0⤊ 0⤋
using a decrease grade of gasoline than cautioned will reason a loss of capacity and gasoline economic device (negating what you think of you would be saving on gasoline) and would reason severe injury to emissions administration kit, somewhat catalytic converters. I surely have seen quite a few those flow undesirable by way of fact a shopper refused to apply top rate gasoline. And Cat's somewhat are not affordable! Use the the excellent option gasoline for yoru vehicle. Your engine runs maximum effectively with it.
2016-11-09 03:40:35 · answer #9 · answered by ? 4 · 0⤊ 0⤋
nothing as all grades of gasoline are unleaded
2007-10-21 13:02:21 · answer #10 · answered by hermitofnorthdome 5 · 0⤊ 0⤋