Fuel Used On A Long Run

[johnboy]

I went to Portsmouth on saturday, 249 miles round trip, i filled up before i left, and filled up again when i got back, guage was reading just under half, worked out fuel consumption to 34 mpg. Im happy with that. :D

[D17 DOW]

I went to Portsmouth on saturday, 249 miles round trip, i filled up before i left, and filled up again when i got back, guage was reading just under half, worked out fuel consumption to 34 mpg. Im happy with that. :D

Not bad at all

[SpokesT]

But (I'm enjoying this, it's like my kids when they just kept saying 'why' when they were little!) if I lifted my right foot, the speed of the car would decrease commensurate with the decrease in fuel being delivered. Yet when I hit the snow button, and the mpg apparently increases, the speed remains the same....

Snow mode will decrease the amount of throttle applied for a given pedal position. If you're going along on the flat or a slight incline and you engage snow mode, you will probably slow down. There should be a noticeable decrease in power. Does your "Snow" light come on in the dash ?

We have a mile long straight dual carriageway which I used to test this. At a steady 40mph I hit 'snow' and there was no loss of speed but the mpg went from just below 40 to just over 40, about 10mpg extra, and there was the slight negative jolt I mentioned before, which I took to be a decrease in power output.

And yes the 'snow' light shows on the dash.

I'm going to try leaving it on on th decent run I do to see what happens mpg-wise.

Cheers for all the info, my knowledge base is broadening, as is my grin whenever I use this forum!

[glennhughes]

Sadly for me the snow button seems to make no diference whatsoever to my mpg the needle remains in the same position regardless, thankfully the cost of fuel is going down so that helps me. Pherhaps it makes more of a difference on the 200's and not the 300's.