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Discussion Starter · #1 ·
I was wondering if it was harmful to put just regular gasoline in my TSX? Is the only drawback performance? Can I damage the engine by not putting super unleaded in it?

Thanks for your help.

Cheers
 

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mprog said:
I was wondering if it was harmful to put just regular gasoline in my TSX? Is the only drawback performance? Can I damage the engine by not putting super unleaded in it?

Thanks for your help.

Cheers
I believe that the TSX engine has a compression ratio high enough to require premium unleaded gasoline. You can try using regular unleaded, but you will probably get less performance out of it (lower mileage, less HP).
 
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Discussion Starter · #3 ·
I've been putting in regular at the pump for a month now, and it seems just fine.

I am just wondering if I could be damaging my car by doing so. I can live with less performance given gas prices today. But I'd put in 91 if regular is causing damage to the engine./

Any thoughts?
 

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mprog said:
I've been putting in regular at the pump for a month now, and it seems just fine.

I am just wondering if I could be damaging my car by doing so. I can live with less performance given gas prices today. But I'd put in 91 if regular is causing damage to the engine./

Any thoughts?
Have you noticed any pinging? If so, you should definitely use a higher octane gas... or risk damaging your engine.

Also, when I stated "less performance", it also includes lower gas mileage. Have you noticed that?
 
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Discussion Starter · #5 ·
Actually, my gas mileage has gone slightly up since I purchased it (stress slightly).

No pinging at all. The car runs just great in my opinion.
 

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mprog said:
Actually, my gas mileage has gone slightly up since I purchased it (stress slightly).

No pinging at all. The car runs just great in my opinion.
Well, if you've noticed no ill-effects (knocking, pinging, lower gas mileage), then you're probably fine.

Your mileage will sometimes go up slightly after the car has gotten broken in.
 

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Even though you aren't seeing any negative effects right now, you may not want to keep using regular unleaded for over long periods of time.

I've read that using a lower than recommended octane can damage an engine over the long-term... you wouldn't want to void your warranty if you end up getting engine problems.
 

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Since you paid around $30k for your car, why don't you pay a little bit more for the gas to save your investment? I wouldnt want to risk such an expensive car just to save a few hundred dollars a year... well. Juz my opinion!
 

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Ditto. Given the amount of money I paid for the car and my desire to keep the car for a long time, I would not risk potential demage to the car to save $150 or so a year.
 
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