87 unless its supercharged then a 91
Yes you can. It will always be cheaper to just buy the 91 octane though so you'd be wasting your money.
87 octane ( unless its the supercharged 5.4 L then 91 octane )
87 octane. I have a 2.5L with a turbo and use 87 octane. I don't notice any difference and the car runs fine.
87 octane is sufficient.
For a 1991 Ford Crown Victoria : " regular " unleaded , 87 octane
No. 91 octane is the minimum. I notice a huge difference in the way a Cadillac runs on 87. I always put 93 octane in Cadillac Fuel systems.
Plus (89 or 91 octane) will nor harm the engine or fuel system on an engine thats call for 87 octane.Plus (89 or 91 octane) will nor harm the engine or fuel system on an engine thats call for 87 octane.
it's a little better than 87 octane but not really high test gas, 91 and 93 octane is the high test.
Not really. Fill up with the "correct" octane when you run some fuel out of your ride.
87 octane would be the minimum but 91 would be more ideal.
my opinion-if it is designed for 87 use 89.