100 octane
i recently discovered a 76 gas station in my town that sells regular, premium, and RACING FUEL. the minimum octane count was 100. would using this fuel damage my engine?
Major Contributor
No, but you won't gain anything. Higher octane fuel is less likely to detonate. On an engine with a knock sensor, the ECU can adjust ignition advance to just below knock point and potentially improve performance. The M20, M30, and M50 engines have no knock sensors, therefore there is no performance benefit to using higher octane fuel than recommended.
1997 535i V8
5spd, OBC, A/C, cruise, BMW phone, factory M-Tech wheel & suspension, 18" Alpinas
4 Grand Master
Waste of money ($7/gal?) even if it does smell good. If it's leaded you'll destroy your catalyst as well
"The gas pedal wouldn't go to the floor if it weren't meant to be there"
5-10 Grand Master
you may or may not gain any mileage/performance, it will most likely not hurt anything if you want to give it a try, it will not be leaded at a public gas station, leaded fuel is not legal on roads, even a gallon or two to a tank will raise the grade a useful amount if it's needed
all america wants is cold beer warm cat and a place to take a poop with a door on it
Grand Master
your idle will suck.
Alusil, Dinan DME | ITG Air Filter | Eibach/Bilstein HD | 26/20 Swaybars | Iridium plugs | Depo/ProLumen HID | Optima batt. | no AC | Stoptech brake lines, Frozen rotors, brass bushings, Superblue
5-10 Grand Master
Idle wont really change.
Leaded doesn't start til like 106 octane around here.
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