Odd MPG on return journeys

ARW · 2020-11-01T17:24:04+00:00

So I am working in Leicester a lot at the moment.I always do a MPG check on the journeys.Now I always get a better MPG on the way back than on the way there.It cannot be load. Sometimes I come back with more than I set off with.The speed it always the same - true 80MPH on cruise control apart from the bit in Sheffield where there is a 60 limit for air quality so I drop to 66MPH.Same route and same mileage both ways.30.4MPG on the way down and 32.3 MPG on the way home today. The only difference was I put 75L of diesel in before setting off back.Any ideas?

Nov 01, 2020 Last reply: 5 years ago 42 Replies

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Roger Hayter 5 years ago

Didn't they used to be made with a 5 or 6mm hole in them?

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The Natural Philosopher 5 years ago

of course. you need some circulation otherwise the engine will overheat before the stat opens

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ARW 5 years ago

Done it again today at 85MPH.

3MPG better on the return journey.

The only speed restrictions are at Meadow Hall (J33 to J34) for air quality.

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