What Octane Rating fuel (91 or 95) should I use for my 1998 Chevrolet Malibu? topic posted in Chevrolet Forum

Discussion in 'Chevrolet' started by kamalpasha, Dec 5, 2007.

  1. kamalpasha
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    kamalpasha New Member

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    some mechanics say a lower octane rating fuel (91) may decrease performance or harm the vehicle's engine; others say for an old car 91 octane rating will do no harm and it is cheaper too.
     
  2. leecavcu
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    leecavcu New Member

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    For a Malibu, you should be using the low octane (regular) fuel. Mechanics fix cars. They rarely know the engineering behind them. Different fuel won't do anything for performance. That is a myth. It won't even help gas mileage. Cars with high compression ratios need a higher octane gas or else the fuel will detonate in the engine prematurely and you will get knock (sounds like marbles in your engine). Sometimes carbon build up can cause knock in older cars so a step up in octane may prevent knock. I would use low octane gas. If you hear your engine kocking, go a step higher in octane level.
     
  3. spamme4444
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    spamme4444 Rookie

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    I use the lowest at the pump on my 94 Grand Prix and my 03 Impala. I get about 30MPG on both at about 75~80 MPH. Both runs by factory specs and never gave me any trouble. The Grand Prix has over 160,000 and the Impala just rolled 80,000 miles.
     
  4. spamme4444
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    spamme4444 Rookie

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    I use the lowest at the pump on my 94 Grand Prix and my 03 Impala. I get about 30MPG on both at about 75~80 MPH. Both runs by factory specs and never gave me any trouble. The Grand Prix has over 160,000 and the Impala just rolled 80,000 miles.
     
  5. charlieofsc
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    charlieofsc Rookie

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    The s0lution to fuel/rough running problems is to avoid buying gas with ethanol at all costs. Ethanol has caused far more problems than poor gas mileage. Find gas stations that take a stand against ethanol and your cars, lawn mowers, chainsaws, boats, etc. Will thank you.
     
  6. mikesheldon
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    mikesheldon Rookie

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    Use the lowest octane you can find... that is what the car calls for. Anything higher is just a waste of your money.You should use what the owners manual says.
     
  7. mikesheldon
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    mikesheldon Rookie

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    You should really use some low octane rating fuel for this car 75 to 80 is my suggession.....
     
  8. markrusell
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    markrusell Rookie

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    well to bypass buying gas with ethanol at all costs. Ethanol has initiated far more difficulties than poor gas mileage. Find gas positions that take a stand contrary to ethanol and your cars
     
  9. jenifer0205
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    jenifer0205 New Member

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    hi, welcome to this site
    here u can find everything
    i suggest u to get help from some expert
    or your friend .now i am not able to answer u.
    ................................................................
     

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