dlazrael

I tried a search first, but I cant find what I am looking for.

So, with rising gas prices recently, Ive been in a rather big fight with my wife over me using premium.

I have a 03 mach 1 with the mods in the sig. I know mach1s are supposed to run 91+ factory, not including a/m parts.

So, am I wrong in telling her i have to use 93? or can a lower octane be used safely? Thanks in advance

LetThePoniesRunFree

Just show the Mrs where it says to run premium unleaded fuel in the owners manual.

Just an after thought, gas prices are actually going down.

dlazrael

aye, i DID but apparantly ford lies or something

mills281e

Tell her your car runs more efficiently on 93 and that you would actually get a little worse gas milage running 87.

impaled

since you have a mach, i would definitely run premium.

if premium is like20 centshigher and you fill up 10 gallons, that is $2a tank. in my opinion$2 a tank isworth it to notping andblow my engine.

for some reason even i with a GT need premium or i will ping like crazy under WOT (i only did that once).

moparrr07

well see how you car doesnt have a disributor, and monitors timing advance off the knock sensor, you should have no problems running 87 octane in it,

ford just recomends the better gas because its marketed as a performance car

blownbayou

So when he puts 87 octane in it and he goes WOT.......Are you going to pay for his rebuilt block???? DETONATION will VENT your block.....I know....I have a BUILT Lower in my Lightning.

Tell you ole lady it is better to pay a little now then have to pay ALOT more later.

Later

2000GT4.6

Theres about a .000000001 percent chance running 87 in a n/a car tuned for 93 will blow it up... on a n/a car its just not as imporant.

However, it says you have a diablosport tune in your car in your sig (OP). That being the case, its almost certianly tuned for 93. Your going to loose power, and fuel economy, with 87, not to mention it could be pinging. Doing so over time will probably damage the engine... but running a single tank of 87 should not do anything to a n/a car.

Colorado_Mustang

Best way to find the right octane for a car that the computer can back the timing off is to track the gas mileage during normal driving. The best gas mileage = the octane you should be running.