Hi guys. Just recently I have noticed a 3 - 5 mpg drop in the MPG I'm getting. I do the same run every day, which is abount 22 miles each way on a mix of dual carriageway and reasonable country roads. Having thought about what may be different over tha last few weeks, all I can come up with is :- I decided to put Total Excellium diesel in one week, as it was massively cheaper that the Shell stuff I usually use. I have had new Good Year Asymmetrics put on the rear. My oil level is more towards the bottom of the dipstick marker than the top. ( must get some more ) The weather has gotten a lot colder. Could any of the above be causing the change do you think ?