premium gas? - Ford Probe GT

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Hey everyone
I just bought a 95 ford probe gt and the manual says that i should use premium gas. I really need to save all the money i can, so ive been using regular.
What are the advantages of using premium and the disadvantages of regular?
Will it be harmful to the engine and will I see a drop in performance if i use regular gas on a regular basis?
thanks
Will Kimball

posted by  willjoe86

The octane levels are how volatile the gas is. The regular is very volatile and makes some engines knock because the gas burns unevenly.. That's why your manual suggests using premium - the octane level is higher so it is less volatile and burns evenly.

posted by  DodgeRida67

I have never heard of a Ford Probe GT needing High octane fuel. Depending on where you live and the price of gas, it might be cheaper to buy regular and use that money saved to buy some octance boost. If you live anywhere in Chicago-land where prices can vary .35-.40 cents between reg and premium that might be an option.

posted by  Voda48

Oh ya - forgot to answer one of your questions.

As long as you don't hear the engine knock, you can go with regular. If it ever knocks, go to silver. If it still knocks then your going to have to use premium.

posted by  DodgeRida67

thanks guys
any other opinions out there?

posted by  willjoe86

this may be a dumb question-what exactly is engine knock?
thanks

posted by  willjoe86

Very well put tbaxleyjr

posted by  Voda48

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