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Are MPG ratings much less accurate then they used to be?



 
 
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  #17  
Old July 24th 05, 06:59 AM
gary
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I remember way back when I used to do my own tune up, timing and all. Now I
don't even recognize what is under the hood.


"Percival P. Cassidy" > wrote in message
news
> On 07/19/05 10:25 am Richard tossed the following ingredients into the
> ever-growing pot of cybersoup:
>
>>>BTW, does the grade (or brand) of gasoline affect mpg? I sometimes use
>>>89, but mostly 87.

>
>> No, except if the motor is into serious knocking. Too much octane is a
>> waste of money and resources.

>
> the Owner's Manual for our '02 300M says 87 is acceptable, but 89 is
> preferable -- but doesn't say why.
>
> Perce



 




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