Thanks
At the moment including the spare am.on 2.5 bar each tyre, which is manufacturers guidelines with 245/4519 XL tyres.

 

Which fuel grade you using? Using lower octane gas surely affects your gas mileage.

 

It's possible the computer is giving you incorrect readings. Fill your tank, take a long highway drive and refill tank. Do the math. Low RPM in the highest gear will give best mpg. If air filters are dirty, changing them will give better mpg. If plugs are over 100k they may also make a difference. You could also have dirty injectors and a few other issues that all add up. Your catalytic converter could be partially clogged. Too many possibilities that can't be resolved on a forum. Get it to a shop and have a diagnostic run on it. Pay the money and maybe get answers based on data, not opinions on a forum.

 

With those numbers I assume a 1st gen Bentley 6.0TT? The Audi version I have gets me 24-26

 

Am using E10, I think 95 Ron

 

Same here, just the regular "supermarket" stuff

 

Great, so today put in some millers fuel additive and also had the car decarbon (ed?)

Will see how she runs now.