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Post by ezbreazzy on Aug 26, 2012 17:38:15 GMT -5
Does anyone know if buying octane booster really does anything to up the octane in low grade gas? reason im asking is because i wasnt paying attention to the gas i was buying this morning and i accidently put in 87 octane fuel instead of 91. i had a bottle of octane booster and i poured in a shot glass full in the tank not sure if i used to much or not enough. if someone could shed some light on this subject i would appreciate it.
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Post by prodigit on Aug 26, 2012 17:48:00 GMT -5
It should do something. It's just making the gasoline a bit thicker, which should prevent early ignition (or pinging).
For the record, cars that need 91 high octane fuel, usually work fine with 89, and 87 too. Just not at max rpm's or max torque.
it's probably not going to do much about performance (meaning 87 fuel with octane booster, will not outperform 91 fuel), and it's not meant for use in the long run (eg: buying regular gasoline with booster instead of premium gasoline).
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Post by dumbass on Aug 26, 2012 17:59:54 GMT -5
The subject of need for high octain in the majority of scooters has been discussed here several times. The majority of scooters DO NOT require more then7 87 octain. China uses a different method for messuring octain. Therefore, a Chinese rating of 90-91 octain is actually below the US 87 octain messurement. So if unless your engine has a pinging sound your fine with the 87 octain.
Bob
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Post by jwalz1 on Aug 27, 2012 12:48:54 GMT -5
It should do something. It's just making the gasoline a bit thicker, which should prevent early ignition (or pinging). For the record, cars that need 91 high octane fuel, usually work fine with 89, and 87 too. Just not at max rpm's or max torque. Cars that require higher octane may run fine on lower octane because they have sensors and ECU that will retard ignition timing to control knock, and when using the lower octane fuel, those cars will generally return lower miles per gallon because of the timing retard. Timing retard also causes engines to run hotter. It won't show up on the temp guage but will break down non-synthetic oil faster. The ability to run less advance would not be true on most scooters, and certainly not Chinese scooters as they do not have the same computers and sensors. If it knocks on lower octane fuel, you can seriously damage the engine. But as Dumbass posted, the difference in octane rating between here and China puts 87 octane in the ok range. When people tell you to "just use lower octane" in cars that require high octane you will essentially get decreased performance, lower fuel mileage and possible fuel washing of the oil. It is bad advice, especially if the higher octane rating is required because of high compression, or turbo or supercharger. It is ok for a tank when you are empty and can't find high octane, but over the long haul will decrease engine life. |
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Post by prodigit on Aug 27, 2012 16:40:42 GMT -5
I've got EFI on my Chinese scooter. It's one of the first to have it, but I suspect a lot more are going to get equipped with cheap electronics.
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Post by derbi on Aug 27, 2012 16:58:18 GMT -5
My PCX uses EFI and i absolutely adore it. no more carbed models for me.
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