Aresby, are you aware that Shell V-power is a gas-to-liquid product and (from what I have read) boasts a higher cetane number but probably has lower density than standard fuel.
A common theme reported by forums I have seen is lower mpg than standard diesel, up to 10% less mpg in a lot of cases.
You should try standard fuel (or BP ultimate if you want to pay premium prices :nutter![]()
No, I wasn't aware about V-Power but I don't really understand the technicalities of what that means either. However, I'm dismayed at the thought of getting less mileage with V-Power than with either normal diesel or with BP Ultimate.
I'll fill up with BP Ultimate for a month or so and see if it makes any kind of difference.
Once thing is for sure: Both Ultimate and V-power give a smoother delivery of power to my car. OTOH perhaps a remap and reverting back to standard diesel is the answer!