Boring fuel economy question

[MacsMegane]

I've got a 1.5dci 86 which has done 116k which I use for my 18 mile commute on mostly A roads part duel carriageway and a bit of country lane. It's averaging about 48 mpg, is this about right or should I've getting more? I drive at the speed limit and notice at 70 I could do with a 6th gear to drop the revs down.

What do you get in yours? I've read economy drops in colder weather with a diesel, Ive had it 2 months. Is this figure about right or does the car have a problem?

[petepete]

I had a 100 hp megane hatch and got 53 mpg driving at limits on fresh oil but that dropped to your figure at oil change due..

tyres at 4mm or below also eat into consumption...

granted it could have done with another gear, but there isn't one !!!

[AlexB]

[MacsMegane]

Interesting, last oil change was June and the car is telling me 5k to service maybe I should do an oil change and see. Three tyres were new just before I got it, fourth has about 5mm all are ditch finders however.

I'm not driving it hard, over half of my commute is at 70.

Interesting graph, so at 70 I should be seeing 45 - 53, what are the 4 lines hi low etc?

[ray1]

i am only getting 43mpg from mine at the moment driving 14 miles a day mainly town and street driving so your doing better than me

[redkite]

My wife is averaging 57 mpg in her sport tourer with the same engine, 1.5 dci 86, doing mainly short trips.

[Georginasweeting]

i have a 1.5l dci i average at 53mpg on dad to day and go up to 58 on longer journeys, average spped being 30-55mph. i have also noticed a little tension when going up to 70mph

[Wickydude]

There are so many variables influencing fuel economy...
The biggest is of course the heavy foot, then there's shifting habits, wind, hills, road type, trip length, tyre brand and type (up to 5% difference seen in tests), tyre wear, etc.
that makes it near impossible to compare fuel economy between two persons with different driving conditions. 48 average is entirely possible imho.

[eric]

60 mpg for my 1.5 dci, and with fuel prices slowly dropping it feels even better

Keep an eye on any really short journeys though, they will lower your average dramatically, and are also bad for engine if it doesn't reach normal temperature.

[Wickydude]

Just to show there are big differences :
https://www.spritmonitor.de/en/overview/ ... owerunit=2