OK, so I've had the car for about 2 months now... adequate time to do some calcs on average MPG's. Filled the tank last month... drove 359.9 miles, refilled with 43.58lts = 8.26mpl or 9.68g = 37.18mpg Most drives have been urban only 2-3 miles and 10-12 miles usually with a short stop in the middle. Then a load of 25 mile trips with a long stop before a 25 mile return. On average, I would say 200 miles in 25 mile trips, and the rest in smaller ones. I have no frame of reference here when it comes to the Accord... only my old Mondeo Saloon which would give me around 43mpg for the same types of journey. According to the gauge, I had used approx 3/4 of the tank and filling it with 43.5lt of a 65lt tank seems to support this as they never fill completely. I've not had the opportunity to do a long run yet, so she's not been trundled up and down a motorway at 70mph since the day of purchase. I am hoping that will improve because I've tried adding some additives... First, I put 250ml of redex into 2/3 of a tank... double the recommended dose... But I got a good deal on 4 bottles with 50% extra free for less than it cost for 3x250ml bottles from your local motorspares place. I Gave the car and good thrashing for a few miles on the drive home today... before I would get thick black smoke when going over 3200rpm, the car may not have been looked after as well as the service history suggests. But 3-4 miles of hard acceleration has cleared out 90% of the black smoke. I can take it up to 4000rpm with hardly any at all now. I'll be adding a further 125ml shot of redex into this full tank and each full tank from now on... as I've got enough redex to last me for another 14 tanks. I've also got a bottle of cataclean to put through the system... used it before and it works. I had a car that failed it's MOT on emissions, pulled the codes and ordered 2 new O2 sensors but they sent the wrong ones... Stuck a bottle of cataclean through it, 25 miles of hard driving and lots of white smoke (don't use an entire bottle with just 15lts of fuel)... and it passed the MOT with flying colours in spite of 2 failed O2 sensors (replaced them a couple of weeks later when the right ones turned up). So hoping a good clear out will improve those MPG's.