Loss Of Mpg.help anyone
Posted 29 November 2012 - 08:22 PM
so if anyone has an idea,that would be great as have a 500 mile trip to do next month.cheers guys.
Posted 29 November 2012 - 11:27 PM
Posted 30 November 2012 - 12:14 AM
the colder weather can have an effect on MPG because a diesel has a better MPG once its warmed up, it can take a long time to warm up in cold weather (if it ever really does) especially for short trips
Winter diesel has anti-freeze in it and there is a small? drop in mpg with this too
Same with winter tyres (more drag)
Check your brakes are not binding and your tyres are at the highest recommended pressure
try resetting your avarage MPG, round town driving can drop the avarage down
are you driving harder, more weight in the car, or shorter runs, round town or in heavy traffic -
seems a big drop in MPG though
Posted 30 November 2012 - 01:27 AM
Posted 30 November 2012 - 10:03 AM
Posted 30 November 2012 - 10:20 AM
Posted 30 November 2012 - 01:49 PM
I use an app to work out my fuel economy, and I check that figure back to what the trip computer says.
In the summer my trip computer was accurate to 1%
Now it's colder, my trip computer is out by 10% (it says 45, actual is 50).
Maybe this has something to do with it?
And diesel fuel economy does suffer in cold weather, as the engine takes so long to warm up
You say you can actually see the fuel gauge going down. Perhaps is was also doing this before, but you didn't notice it?
Posted 30 November 2012 - 05:41 PM
Posted 30 November 2012 - 05:51 PM
try re-setting the ECU? unplug the battery for 30 mins then plug it back in. keep your radio code to hand! thats not good mpg though! im getting more than that from my 1.8 petrol!!!
are you sure your not driving a diesel?? lol you get more than 40mpg in a 1.8 petrol?? i struggle to get 26mpg haha
Posted 30 November 2012 - 08:11 PM
Posted 01 December 2012 - 05:37 PM
Posted 01 December 2012 - 05:55 PM
In the summer I can get 500 miles to a tank but in winter it drops by about 40-50 miles.
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