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#1
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premium gas?
the svx asks for premium gas, but does it really matter? other than the added performance.
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#2
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Re: premium gas?
Yes, it does matter. Your engine will knock if you use any grade lower than 91 octane.
However, if you have to use a lower grade 89/87 fuel, it will do no permanent damage to your car, as our engines have knock sensors that will dial back timing when knock is detected. -Chike Quote:
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"Wise men talk because they have something to say; fools, because they have to say something." - Plato 2013 Cosmic Blue 5spd Evo X GSR 2006 Galaxy Gray 6MT RX-8 (sold) 2006 Steel Gray WRX TR (sold) 1996 Brilliant Red SVX L (sold) |
#3
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Re: premium gas?
Quote:
Thanks, and enjoy yourself here. Mike |
#4
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There is no consensus on this issue. I believe that it will simply lower performance as long as the knock sensors detect pinking. Others believe that the ECU will permanently recalibrate itself and original performance will never be fully restored. I've seen no evidence of the latter, and it seems illogical and improbable to me, but I digress [lest I stir up an old debate.]
We do all tend to agree that no damage will occur unless your knock sensors are defective. (Check the codes to find out.) Some vehicles will exhibit unpredictable symptoms, such as hesitation; low, high or unsteady idle speed; poor mileage; surging; and even stalling. These things rarely happen and should not normally affect a good engine. |
#5
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I agree with you UberRoo. I seriously doubt anything long-term will be saved on the ECU and if something is, the ecu will re-learn itself once premium gas is used again.
Nismo, if you want to get the best gas mileage or even the ultimate performance out of your SVX, you need to use premium. If not, then running regular gas shouldn't hurt your car - as long as your knock sensors are working. -Chike Quote:
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"Wise men talk because they have something to say; fools, because they have to say something." - Plato 2013 Cosmic Blue 5spd Evo X GSR 2006 Galaxy Gray 6MT RX-8 (sold) 2006 Steel Gray WRX TR (sold) 1996 Brilliant Red SVX L (sold) |
#6
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given the tendancy to fail of the early 90's vintage knock sensors, I wouldn't do less than premium except in the case of emergency. but seriously, spring the extra 20 cents for premium. if you're putting in 10 gallons, that's the price of 8 gumballs. 8 gumballs vs the health of your engine. you decide.
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IggDawg is cool -IggDawg 1992 Teal SVX LS-L 160k miles 4.11:1 final drive, K&B dropsprings, ART front rotors, stainless steel brake, aluminum underdrive crank pulley, Kuhmo Ecsta Supra 712's, K&N drop-in filter. Previously owned by Alacrity024. FOR SALE 1994 SVX LSi, Barcelona Red #1659, build date 11/93, 117k miles, RIP ECUtune stage 1, bead crush, smallcar shift kit, TB bypass, SS brake lines, silencer removed, alternator and grounding wires, Mobil1 @ 117k |
#7
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mmm gumballs
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#8
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We had an SVX in a few months ago with the check engine light on, poor idle, poor acceleration, poor gas mileage. Pulled codes for both knock sensors, which tested good. Traced the problem to the 87 octane the owner had been using for the past month or so. A few weeks later, after 2-3 tanks of 91 octane, he called to say the check enigne light went off and his performance and gas mileage was back to normal.
Don't be cheap. Gas in the U.S. is some of the cheapset gas on Earth. Dave. |
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