Wildly inaccurate MPG

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Wildly inaccurate MPG

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Diesel Engines A forum dedicated to diesel engines fitted to Volvo cars. See the first post in this forum for a list of the diesel engines.

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Sep 10th, 2017, 06:22

tt82

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Quote:

Originally Posted by LoudPedal

Interesting... How much difference do you get in (real) mpg between the two? I'm using Tesco at the moment but could be persuaded to try Shell if it was going to work out more economical overall.

It's funny that it would make a difference since the ECU will be doing its mpg calculations based on how long the injectors are open for rather than any sort of power measurement. The only way I can see the fuel brand making a difference to the accuracy is if the shell fuel was more viscous so less flow for the same injector time.

IIRC Using Shell the Car was generally optimistic by 2-3mpg, with Tesco it was usually a difference of around 5mpg.

All the stats are available on my Fuelly profile in you want to have a look.

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