2 questions (Fuel & Air Filter)

66mustangg said:

The high octane will only give you a performance increase when your in the high RPM range. In the low RPM range it does the same as regular. So unless your racing it, with the gas prices now... i wouldnt put the high octane in.

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fazm83 said:

I have a K&N and yes its worth it, because its only like 3 times more than regular filter, and u dont have to replace/clean it as often.

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Fourth Horseman said:

^^^ What they said. Unless your car's tune is set up with more timing you don't need higher octane gasoline. At best you're just wasting money and at worst you're getting late detonation (as mentioned above). Higher octane fuel is not more powerful. That's a common misconception.

If you're hearing pinging or knocking when running on 87 then I'd recommend going to the mid-grade gasoline. Otherwise, just pump what the manual recommends.

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