Something I find interesting is the figure "to fill up" after you've just filled up.

Having done thousands of miles of the same routes and speeds I'd expect the car to be capable of knowing how far I could go on a tank - but no. When I fill up it reckons I could manage 465 miles from a tank yet it has never been over 330 (I run it until it says 5 miles to fill up).

Do you normally fill up during a long trip, or after a particularly conservative drive?

Cos if you do, it might be that the car is assessing the fuel load after a fill up on the driving just prior to refuelling. However, after being driven again (say from cold a couple of times) it re-assess the expected range and therefore the amount drops?

Hmmm.No one has talked about the effects of having the air conditioning/climate control on.Not tried the test in the octavia or current fabia.Previous cars have produced seriously reduced mpg when it is on.

Should it not affect it?

Hmmm.No one has talked about the effects of having the air conditioning/climate control on.Not tried the test in the octavia or current fabia.Previous cars have produced seriously reduced mpg when it is on.

Should it not affect it?

I believe the Fabia runs the compressor all the time so you can't actually turn it off. Would expect to see a difference in the Octy though, especially on a hot day where it was having to work hard to keep the car cool

Chris

I do a similar thing Steve, and record the mileage and trip on the fuel receipt. But I never seem to get round to calculating the MPG from the receipts!

Steve, I have a spreadsheet that I just plug the numbers into for calculating my at-the-pump mpg....

Chris

fabia_mpg.zip

I believe the Fabia runs the compressor all the time so you can't actually turn it off. Would expect to see a difference in the Octy though' date=' especially on a hot day where it was having to work hard to keep the car cool

Chris[/quote']

While the compressor turns all the time on the Fabia's air con, turning it off shuts a valve in the coolant system, so the coolant doesn't circulate and therefore the compressor turns against very little resistance. It's only when the valve is open and the coolant is circulating that the compressor's under any appreciable load. While it's probably not as efficient as the clutch system that the Octy has, which completely disconnects the compressor from the belt, it's a good deal less complex, and so theoretically more reliable. Seeing how little space there is insode my Fabia's engine bay, I wouldn't be surprised if you'd need to do some serious dismantling to fix the air con if it did go wrong... :eek:

On 1500ish mile average on the trip computer it's claiming 43.1 mpg average.

I reckon that's actually fairly close to what it is/has been.

Now got the PD160 intake fitted + Green filter and early indicators are that it has indeed improved mpg very, very slightly, 1..2 mpg at the most, when I drive as per before. That said, it can rev a lot higher without 'it feeling wrong/sounding wrong' which would negate that benefit