Gas Milage

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01-02-07, 01:01 PM

#16

MadloR

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Join Date: Nov 2006

Location: ny

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yes...

Quote:

Originally Posted by oldcajun

The engine has a sensor to detect pre-ignition. If it is detected, the engine control retards the timing to prevent damage. If in using lower octane fuel, the engine control retards the timing, the power and mileage will be reduced. If no pre-ignition is detected, the engine performance will not be effected by the fuel octane rating. So far, on my RX400h, I have not seen any effect of octane rating. There is likely a variation from car to car on compression ratio and/or timing, so results may vary.
Steve

Yes, and my point being is that pre-ignition is experienced under load (i.e. WOT) and there the knock sensor will come into play and retard the timing. Under easy does it mode, I can't see how the engine and electronics can take advantage of better fuel economy...

Cheers,

MadloR

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01-02-07, 01:43 PM

#17

ler0y

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Join Date: Aug 2006

Location: Canada

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Whoa.... The sticker on my door says the tire pressure should be 30 psi, unless I read it wrong. I'm averaging about 10.8L/100 km now, or 21.78 mpg which is really bumming me out. My best mileage was about 30 mpg in the summer. My worst mileage was 17.82 mpg a few months ago.