25-09-2018, 09:11 AM
Is that brim to brim or are you going off the fuel gauge? These old 2.0 HDis aren't that fussy about servicing, I guarantee that more than a service is needed if that's genuine mpg, I've had done without a service in 20k+ that still averaged over 50mpg mixed.
Assiming the brakes are free, first place to look would be the intake system, dodgy MAF or loose boost pipe.
Assiming the brakes are free, first place to look would be the intake system, dodgy MAF or loose boost pipe.