Hey B21
I get 500ish to a tank. about £45 fill up(I go for 50L's).
I do mainly drive on Mways, 25 mile to work, I have usually drivin about 65-70(still in my escort mode lol) but I have been drivin at 80 and I think my Mpg will be slightly higher this time should get over 500. I have changed my tyre pressure this week 2!
(I so wanted the trip)
Have you tried any fuel cleaners? do you know what oil is in the engine?(0W-40 or 5w-40?) what state the air filter is in?(I'm just interested for when mine takes a dive)
I've done about 6-7k on my first oil change and seems to be still going strong tho I had to top up last week.