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Thread: Best MPG
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Old 26th January 2012, 07:50 PM   #14 (permalink)
charles charlie
charles charlie is chasing a Veyron from 30-130mph
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Join Date: May 2008
Location: North West
Cars owned: E36 M3 Evo, Mini Cooper S, 996 Boxster S, Caterham Super 7, Merc Tractor :(
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Quote:
Originally Posted by donski D View Post
From May to November last year I averaged 19 mpg, in November I had a y-pipe fitted and the 36000 mile service.

Since then 16 mpg...... WTF???

Whats to blame ? the y-pipe or the service ??



Cheers
Possibly a couple of factors.

Colder air is denser so means more fuel to maintain the AFR.

Also your y-pipe may be allowing better gas flow out which in turn means more air into engine. Again ECU may adjust fuelling to maintain AFR.

Or maybe you should just drive the thing and stop looking at the MPG?!
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