I always fill my Smart diesel when the gauge is just under half full,and i have done 300 miles.It takes 5 galls to fill,so thats 60 MPG all round town work.

 

        When i make the odd longer trip,eg Manchester to Blackpool  100 mile round trip, i get 80 MPG.

 

             They say you can get 600 miles from a tank,but i would not risk it. Even if i did Manchester to London return it would only be 400 miles,so why bother.Then again i would not drive to London when i can get the train for only £20 return booking well in advance with my railcard,and it only takes 2 hours.

Had to refill as expected, 438.6 miles from filling up, 31.94 litres to refill, so around 62.4mpg I make that.

Now I'm no longer putting high octane fuel in my car I don't really stick to one brand anymore, but usually choose a garage rather than supermarkets - but that's only cos I hate supermarkets in general and they're always chockablock. I mean, with the Citigo's frugality you're only talking a £1 or £2 difference, and petrol prices are generally coming down now at least in my area. A tankful costs me about £42 at the moment, from about £46 when I got the car back in July. How much of that is due to volume expansion in cold or warm weather I do not know.

 

I average about 400 miles to a tank - at least on the PID. That is a daily working week commute of NSL single track roads and a big chunk of dual carriageway. There are something like 3 sets of lights on my journey, with generally light traffic. In dry weather I can get 64mpg on the way in to work but never more than 55mpg on the way back. I usually sit at 60ish on the dual carriageway and take it easy unless I feel I'm holding people up. If it's raining then the mpg drops off considerably.

Mileage/mpg depends, I've found, mostly on subtle elevation differences. I observed significant differences in mpg between journeys to & from work - this tool confirmed my elevation/gradient suspicions: http://www.doogal.co.uk/RouteElevation.php - it plots a specified route on a graph.

Is it common practice to continue driving until the tank is nearly empty?  No matter what car I've owned, it's tank size or mpg....I've always filled up at about the "one- quarter mark". Not sure of the point of waiting any longer?

Is it common practice to continue driving until the tank is nearly empty?  No matter what car I've owned, it's tank size or mpg....I've always filled up at about the "one- quarter mark". Not sure of the point of waiting any longer?

I would have thought that overall the point would be less trips to the petrol station

Is it common practice to continue driving until the tank is nearly empty?  No matter what car I've owned, it's tank size or mpg....I've always filled up at about the "one- quarter mark". Not sure of the point of waiting any longer?

I jave started to do that and surprisingly I am getting higher MPGs..