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      04-18-2019, 11:10 AM   #43
DrifterX
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Drives: 2016 340i M Sport 6MT+RWD
Join Date: Sep 2014
Location: Toronto, Ontario

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Quote:
Originally Posted by Jim S View Post
A new test procedure has recently been introduced to measure "real world" mpg consumption figures in all new cars. This is called the WLTP (Worldwide Harmonised Light Vehicle Test Procedure). For the new Z4 M40i in UK the figure that BMW quotes is 32.8 mpg.

This is for petrol (gas) measured in Imperial Gallons. The US Gallon is about 20% less than an Imperial Gallon so you need to adjust your figures accordingly; so 30 mpg In the US is equivalent to about 36 mpg when using Imperial Gallons.
Ahh, yes - imperial vs US measurements I should have figured. 33-32 imperial mpg is right on the money then (8.7L/100km = 32.47 imperial mpg). I think you could do better since your car is lighter than mine, granted you do similar hwy/city driving, of course... then again you have a convertible so I wonder how much aerodynamics would affect it. Definitely not an apples to apples comparison.
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2016 Estoril Blue II 340i M Sport | ///MPPSK | 6MT | RWD | Fully Loaded
BM3 Stage 2+ 93 | B58TU HPFP | VRSF v2 Catted Downpipe | 550i Clutch
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