hippo wrote:
> dk@[EMAIL PROTECTED] (DK) Aug 25, 2008 at 05:16 PM wrote:
>
>> Impreza 1993, EJ18 engine, manual.
>
>> Exclusively city driving, average trip about 5-7 miles. Was trying to
>> drive keeping RPMs close to 2,000 or to 3,000. For the most part
>> in practice it meant choice between 4th and 3rd gear.
>
>> Same pump, fuel contains "up to" 10% ethanol, same weather, two
>> full tanks for each "condition". The milage was consistent between
>> two tanks in each case within 0.3 MPG. Results:
>
>> ~ 1,800-2,300 RPM = 26.7 MPG
>> ~ 2,500-3,200 RPM = 28.1 MPG
>> (No, EJ18 is not a marvel of fuel economy :-))
>
>> Based on what I read before, I expected the opposite result. In any
>> case, the difference is no more than 5%, so it's not really worth
>> it to keep attention to. Lower RPM is less noise and less power.
>> What's better for the engine in the long run?
>
>> DK
>
> Longer trips will do the most to increase your engine life and minimise
> wear! Most engine damage occurs in the first few miles/Kms when the engine
> is not properly warmed up. If you run a longer distance for your test, you
> may notice more variety in your figures. Cheers
>
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Hi,
If that is his usual driving pattern, at least the car needs more
frequent oil change for sure.