I'm confused - what are you comparing that only costs you 3p / L more (1.50 increase over 50l tank) ?
I'm going off vpower (which is what I use) and the cost saving of paying more for fuel vs increased mpg. I hope that makes sense. I can understand if you get 40+ mpg but on powerful cars that ain't going to happen.
I'm talking the next level up 400hp powerful, and 50mph average is not what I meant. If you are driving them as intended you won't be getting good economy, (and TBH im sceptical that and m135 gets better mpg than my wife's old 1.4 fiesta). Quite impressive with the mx5 though as I thought with a supercharge you end up sacrificing economy all the time (which ] guess it has done).
OK if the vpower is 1.40 and normal 1.30 and mpg 20->22 so 10 % increase then 22/20 * 1.3/1.4 * £70Vfill-up would have cost 71.50 for a normal tank
8th gear at tick over and it sits at 50mph - thus why it's occasionally better mpg than a 1.4 fiesta. yeah, that's not how to typically drive the car, but I was just confirming the previous post suggesting 40+mpg should be do-able with a M135i. get off the motorway and into sport and soon in the teens. tbh, my combined mpg with a lot of stop-start commuting is about 27-28mpg, which is v similar to my previous NC 2.0 mx5 and a hell of a lot better than my 6mps prior to that - so, in my eyes it's great mpg for a 326 brake hatchback. As to whether the majority would deem it "powerful" is a different debate
Fair enough i was going to ask if you were sure it wasn't a 116d with an m badge on it
. TBH that shows the whole issue with 'official' mpg figures, yea with turbos if you cruise its good as the engine is smaller, but as soon as you press on i would guess its not that different to a larger N/A engine with a similar amount of power. And as the other guy said, i did try looking at websites and found the same, at least drive a 4.0litre V8 means i never have to wait long to visit the petrol station
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The best I saw, door to door, from the M135i was 44.4mpg (Leeds to Milton Keynes). Over 72k miles in 2 1/2 years I averaged 34.3mpg from it, and that included 2 track days and 2 trips to Germany including 8 laps of the Nurburgring. In the M3 I've averaged 29.1mpg over 18k miles so far, and that also includes 2 trips to Germany, one of which also included 8 laps of the Ring.
Yea it's quite a bit lower than I thought it would be. My old 911 which was a 3.6 litre twin turbo and 420 HP got low 30s on the motorway but that was basically just idling.
Thermostat sticking doesn’t help either. They go sluggish and run cold
I think after 40 miles of 50mph I might be suicidal. Did you see any workmen?
Well you are wrong as turbos reduce pumping losses
