I'm here to learn
more about a 156
Join Date: Oct 2009
Location: United Kingdom
As above brim it, find out how much you have put in, divide it by 4.54 to work out gallons. now use the covered mileage to work out MPG.
Mine can tell me one minute I have 500+ miles in the tank, then suddenly tell me it's only 100+ miles, the 'live MPG figures range from 5 MPG to 141+ MPG......rule of thumb don't let the fuel gauge / computer lead you to think that the readings are real, I have and always will brim it, calculate real figures, it's the only true way, and is 100% not gauged (A means of estimating or evaluating).
I'm getting 30 MPG on mixed driving on my 2002 2.0 JTS. I also find that it takes a while to warm up, apparently this is typical for a JTS, but don't quote me on that.