Am I damaging my GS430 by using 91-octane premium gas in California? (93-oct at home)
09-25-05, 08:25 AM
#16
Originally Posted by TheSupe87
Higher octane usually just burns hotter.
Actually, higher octane burns cooler under the same condition. It is harder to ignite than 87 octane. For internal power (of gasoline), 87 is more volitile
This is why some people use 87 octane in very cold temperature instead of the recommended 91 because it is easier for the engine to start.
09-25-05, 10:08 AM
#17
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Originally Posted by reggiek
I'm not an expert but I believe any car would run better with cooler air being fed into the engine. Hot air is thicker, cool air thinner.
Well back to physics class for you. They call them "hot air ballons" because hot air is less dense, and rises in cold air. Same for why you see clouds forming. You are correct that colder air makes an engine run better, because cold air is denser and carries more oxygen for a given volume. Just ask a drag racer.
09-25-05, 11:50 AM
#18
Originally Posted by SRK
Well back to physics class for you. They call them "hot air ballons" because hot air is less dense, and rises in cold air. Same for why you see clouds forming. You are correct that colder air makes an engine run better, because cold air is denser and carries more oxygen for a given volume. Just ask a drag racer.
09-26-05, 07:31 PM
#20
I called my dealer, Lexus of Manhattan, this morning. The service advisor who has worked on all three of my Lexus vehicles told me to take it slow while I'm driving on "California low-buzz gasoline".... He has had several customers who drive their cars between CA and NY. There's
always some kind of problem after a few weeks/months using low-octane 91 gas in CA.
However, he did tell me not to worry, since everything will still be covered under warranty.
always some kind of problem after a few weeks/months using low-octane 91 gas in CA.
However, he did tell me not to worry, since everything will still be covered under warranty.
09-26-05, 08:22 PM
#21
Either something happened during the trip, or there is a misunderstanding.
IF 91-octane would have created problems, hundreds of thousands lexus automobile would all have problems (since they are running on 91 for years), which we know is not the case.
Modern day cars are very forgiving when it comes to fuel. Put 87 octane in your car and the ECU will automatically retard the timing. The result would be having less power (often mistaken for sluggish).
IF 91-octane would have created problems, hundreds of thousands lexus automobile would all have problems (since they are running on 91 for years), which we know is not the case.
Modern day cars are very forgiving when it comes to fuel. Put 87 octane in your car and the ECU will automatically retard the timing. The result would be having less power (often mistaken for sluggish).
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