| H23 Guys, what fuel do you use? - Click HERE for Original Thread |
| stealth |
Do you guys actually use the recommended premium?
Is it needed?
I just put midgrade in mine, and it seems fine. |
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| Shady_Pro |
| using 91 seems like a good idea to me whether its my toy or my daily driver...its more expensive, but i also get better gas mileage... |
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| 92_WhItE_H23 |
| i used 87 in mine the whole time i owned it.. it ran fine. |
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| dtjohnst |
quote:
Originally posted by stealth
Do you guys actually use the recommended premium?
Is it needed?
I just put midgrade in mine, and it seems fine.
Depends on many factors. On a hot day, you don't want to have too low an octane rating, but bear in mind that manufacturers specs are gears to the safe side. Using too high a number won't damage the vehicle, using too low will. So 91 Octane will keep cars from knocking in Texas. In colder air, you can use lower octane without losing performance. So in the winter, you can definately use lower octane.
Most modern computers compensate if lower octane fuel is used. The result is generally bad mileage. Unless you hear audible knocking. The usual range that an engine can handle is upwards of +/- 7. So, 84 should be fine even, especially given we're in Canada. But you'd definately see performance degredation there. If you really don't want to use the expensive stuff, test it. Check milage on 91, then try something lower and compare.
And during winter, definately downgrade. You can go to the cheapest gas there is and still be good to go given the cold temperatures here. |
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| stealth |
| Thanks for the info, i'm not looking for performance, im just looking to be fuel efficient and safe. |
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| 2ndgenlude |
| my gas door says premium fuel only so thats what she gets :) |
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| Nis13 |
| can someone explain engine knocking |
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| dtjohnst |
quote:
Originally posted by Nis13
can someone explain engine knocking
Knocking is the layman term for "detonation", though most people now know it as detonation. Basically, the air/fuel mixture explodes in the combustion chamber before it's supposed to. This is as opposed to a controlled burn where there is no real explosion just rapid expansion of gasses. The explosion sends off a shockwave which is heard as a "ping" in the engine.
If your car makes some random ticking kinds of sounds, that's not pinging. That's mechanics moving. Knocking will be very noticeable. Not only by sound, but by rapidly failing engine components. Most engines won't last very long with any form of knocking.
Also, many modern computers can compensate for minor knocking. They adjust timings, mixture and a whole multitude of things to try and keep your car safe and happy. Sometimes problems are just outside their ability to deal with. Low octane fuel is something a computer can't fix on it's on, and it's one of the most common causes for knocking.
Brief rundown: http://en.wikipedia.org/wiki/Engine_knocking
Indepth explanation: http://www.faqs.org/faqs/autos/gaso...3/preamble.html |
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| mike3 |
| My gas door also says premium only.... but its an H23...she doesnt care. I think i put premium in once, and didnt notice a difference, with the h22 it only gets premium and an octane boster. |
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