Many claims are made about how your choice of tyre can affect fuel consumption. The Conti's are supposed to be pretty good with regards to fuel consumption. But is this true?
NEVER FEAR OCUK, FOR I SET OUT TO FIND OUT.
I decided to TEST the fuel economy provided by these tyres with an economy run. The rules were simple - brim the tank, drive, brim the tank again, calculate economy the old fashioned way. I would need to drive at the speed limit at all times - but not above. So no crawling along at 55mph - it was speed limit all the way. I also couldnt be bothered with other stuff so the AC stayed on.
I began by pulling up Sainsburys in Plymouth, behind this really nice E39 M5. I've taken a photo to show you guys. As the guy came back I called out 'Nice M5 mate' but he didnt seem very happy, slammed his door and drove off faster than I would advise for leaving a petrol pump. Shame.
Anyway, I filled up to the brim and obtained a receipt as PROOF!
And then I drove all the way up the A38 (Which is 40 miles of hilly dual carriageway) to the M5, and then up the M5 before pulling off at Cribbs Causeway and once again filling up, to the brim, at the Shell garage opposite Dick Lovett BMW.
Anyway, as you can see, my trip used 13.72 litres of fuel to cover a distance of 118 miles. This is 3.022 gallons, which means I acheived...
39.04 miles per gallon.
I dont know about you, but I think 39.04 confirmed, verified and 100% accurate MPG fill-up to fill-up out of an 8 year old 3 litre 5 Series at Motorway speeds the whole way (Plus a hilly dual carriageway) is nothing short of amazing.
Oh, and the answer to the original question? I used to get about 36-37ish out of the F1's.
You might be interested to know what I got on the way back (Topped up at the same Shell on the way down from Worcester today).... 33mpg

The economy thing got a bit boring. Loads less frustrating though as you dont get tards pulling out into the outside lane etc at 70..