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Re: Octane 97 fuel
chris
using higher than recommended octane will not damage your car, unlike lower than recommended.
the reason for using higher octane gas is for high compression/performance engines that may require fuel to be less prone to 'detonation' (premature ignition due to ambient heat)
even in todays stock exotics, you may not realize any performance gains using high octane, since the ECU was not programmed to utlize the higher gas.
however, it will not harm your car.
using higher than recommended octane will not damage your car, unlike lower than recommended.
the reason for using higher octane gas is for high compression/performance engines that may require fuel to be less prone to 'detonation' (premature ignition due to ambient heat)
even in todays stock exotics, you may not realize any performance gains using high octane, since the ECU was not programmed to utlize the higher gas.
however, it will not harm your car.
Dec 24, 2004 9:48:11 AM
- Rich C (UK)
- Veteran
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- Loc: Mortimer, UK
- Posts: 1098, Gallery
- Registered on: Jul 11, 2004
- Reply to: Moogle
Re: Octane 97 fuel
Don't most of the modern exotics (and non-exotics for that matter) sense the octane rating of the fuel and adjust the enginemanagement accordingly?
For example my old Boxster S recommended high octane fuel but I was OK to put the regular stuff in, just didn't get the full performance....
For example my old Boxster S recommended high octane fuel but I was OK to put the regular stuff in, just didn't get the full performance....
Dec 24, 2004 3:11:44 PM
- iia
- Pilot
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- Loc: Canada
- Posts: 342, Gallery
- Registered on: Aug 24, 2004
- Reply to: Rich C (UK)
Re: Octane 97 fuel
Knock sensor will adjust the "fire" timing when using lower octane rating, so it will not demage the enigne for normal use except performance degrade. But using it for extened period of time and/or tracking might harm your engine.
From Technical Correspondence in Road & Track:
Regarding to higher octane, the only harm should be to your wallet. Exotic racing fuels with very high octane ratings can cause exhaust valve damage and possibly cylinder head distress (cracking) because such fuels burn more slowly. That can mean fire burning right through the exhaust port, hence the heat-related damage. But commercially available pump fuels have very similar burning characteristics and pose no such danger.
From Technical Correspondence in Road & Track:
Regarding to higher octane, the only harm should be to your wallet. Exotic racing fuels with very high octane ratings can cause exhaust valve damage and possibly cylinder head distress (cracking) because such fuels burn more slowly. That can mean fire burning right through the exhaust port, hence the heat-related damage. But commercially available pump fuels have very similar burning characteristics and pose no such danger.
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