Poor fuel consumption
I owned a Lexus RX400h, which gave consistent results of 34mpg summer and 33mpg winter.
My current Lexus Rx450h (2009 with 70,000 miles) doesn't get much better than 32mpg.
It's puzzling as the 400h is rated at 34mpg and the 450h 44mpg. If I could achieve close to the rated mpg with the 400h, why cannot I achieve better with the 450h? My driving journeys and habits have not changed, if anything, I have become more diligent in trying to achieve the better economy.
My current Lexus Rx450h (2009 with 70,000 miles) doesn't get much better than 32mpg.
It's puzzling as the 400h is rated at 34mpg and the 450h 44mpg. If I could achieve close to the rated mpg with the 400h, why cannot I achieve better with the 450h? My driving journeys and habits have not changed, if anything, I have become more diligent in trying to achieve the better economy.
Asked on 22 June 2013 by fivelnote
Answered by
Honest John
I got that from a 400h. The reason why the 450h is not more economical in real life is that it was optimised for the ECDC lab test cycle in order to get it rated lower CO2. Optimising engines for the EC tests sacrifices some of their efficiency in real life conditions.
Tags:
fuel economy
real mpg
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Every time you enter an average consumption figure against your car, the overall average automatically adjusts to reflect it.
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