Get about 38-40 mpg out of my TD4 commercial and thats driving around on local roads,,must admit the mrs is always moaning about me crawling about like a snail !!
My Td4 was returning about 25mpg until I started putting Millers Diesel Sport in about a month ago. It soon went up to 33mpg once that got to work, and on the last fill up last week I'd done 390 miles and it took 9.75gal of fuel to fill back up. And that equals 40mpg by my reckoning. What a difference! That Millers seems to be good stuff.
That was a mix of driving, including carrying 30 paving slabs on one journey