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91 octane fuel in a N/a 3800 good or bad?

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It's not really worth putting a higher octane in a engine the cant utilize the higher octane. You may notice a small gain or you may not. It will however decrease your gas mileage.

I would say don't waste your money, it's not really worth it.
 
Jomamma said:
It's not really worth putting a higher octane in a engine the cant utilize the higher octane. You may notice a small gain or you may not. It will however decrease your gas mileage.

I would say don't waste your money, it's not really worth it.
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oh okay, i thought it would at least increase the mileage,
 


Every gas station ive been too in jersey it's all 10% ethanol, no matter the octane rating.

Shell v power is 93, IIRC
 
Jomamma said:
Every gas station ive been too in jersey it's all 10% ethanol, no matter the octane rating.

Shell v power is 93, IIRC
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Depends on where you are and what your state laws are.

Here its your average across all of your products must be 5%.

Thus 87 can be 10%, 89 is 5% and 91 is 0%.

Petro is more tricky.

If the station carries 94, then all products are 10%. If they don't then 91 is 0%.
 
I'd just stick to 87, unless the uncommon chance that you find pure gasoline for a specific octane rating at the pump.
 
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