Gas attendant pumped regular last night
05-23-2017, 05:42 PM
#3
Yeah the car will adjust to low octane due to knock sensors. Just won't have full power until you refill with premium
You can always throw in a bottle of octane boost if you want full power with this tank of gas
You can always throw in a bottle of octane boost if you want full power with this tank of gas
05-24-2017, 11:47 AM
#4
All US-spec vehicles since 2001 must retain an "alternate fuel map" for use with gasoline of lower spec. Yes, that map will provide lower horsepower - on the order of 10% or so - but there is no harm involved whatever.
In fact, I run NOTHING but Regular gas in my CL500, many years now. Used to be a 20-cent difference for Premium, but these days it is 50-cents and more. I don't use or need that extra 10% horsepower on a daily basis, so why not?
If you say "engine longevity" I'll correct you: the engine only "needs" that extra octane a tiny percentage of the time, for example under full acceleration on a hot day. ALL the rest of the time, that 93-octane stuff is going to WASTE, not needed in the slightest for normal driving. Even under full acceleration, the Alternate Fuel Map and the knock sensors will prevent pre-ignition and potential for damage. And I so rarely drive anymore under full acceleration!
If you are under full acceleration all the time, by all means spend the money for 93-octane. If you drive normally, however, there is NO DIFFERENCE to the engine using regular-grade gas.
In fact, I run NOTHING but Regular gas in my CL500, many years now. Used to be a 20-cent difference for Premium, but these days it is 50-cents and more. I don't use or need that extra 10% horsepower on a daily basis, so why not?
If you say "engine longevity" I'll correct you: the engine only "needs" that extra octane a tiny percentage of the time, for example under full acceleration on a hot day. ALL the rest of the time, that 93-octane stuff is going to WASTE, not needed in the slightest for normal driving. Even under full acceleration, the Alternate Fuel Map and the knock sensors will prevent pre-ignition and potential for damage. And I so rarely drive anymore under full acceleration!
If you are under full acceleration all the time, by all means spend the money for 93-octane. If you drive normally, however, there is NO DIFFERENCE to the engine using regular-grade gas.
Last edited by smartadze; 05-24-2017 at 11:55 AM.
05-24-2017, 01:04 PM
#5
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05 E55, 98 CLK320
All US-spec vehicles since 2001 must retain an "alternate fuel map" for use with gasoline of lower spec. Yes, that map will provide lower horsepower - on the order of 10% or so - but there is no harm involved whatever.
In fact, I run NOTHING but Regular gas in my CL500, many years now. Used to be a 20-cent difference for Premium, but these days it is 50-cents and more. I don't use or need that extra 10% horsepower on a daily basis, so why not?
If you say "engine longevity" I'll correct you: the engine only "needs" that extra octane a tiny percentage of the time, for example under full acceleration on a hot day. ALL the rest of the time, that 93-octane stuff is going to WASTE, not needed in the slightest for normal driving. Even under full acceleration, the Alternate Fuel Map and the knock sensors will prevent pre-ignition and potential for damage. And I so rarely drive anymore under full acceleration!
If you are under full acceleration all the time, by all means spend the money for 93-octane. If you drive normally, however, there is NO DIFFERENCE to the engine using regular-grade gas.
In fact, I run NOTHING but Regular gas in my CL500, many years now. Used to be a 20-cent difference for Premium, but these days it is 50-cents and more. I don't use or need that extra 10% horsepower on a daily basis, so why not?
If you say "engine longevity" I'll correct you: the engine only "needs" that extra octane a tiny percentage of the time, for example under full acceleration on a hot day. ALL the rest of the time, that 93-octane stuff is going to WASTE, not needed in the slightest for normal driving. Even under full acceleration, the Alternate Fuel Map and the knock sensors will prevent pre-ignition and potential for damage. And I so rarely drive anymore under full acceleration!
If you are under full acceleration all the time, by all means spend the money for 93-octane. If you drive normally, however, there is NO DIFFERENCE to the engine using regular-grade gas.
