Hello people,

My 2.0l gt tdi golf has dropped mpg today, normally I can get an easy indicated 60 to 70mpg on my trip to and from work 35ish miles each way, however this morning i put £50 worth of diesel in the tank which put my range up to 500ish miles.

I noticed this afternoon that I only achieved 45mpg at the point in my journey home when I would normally be at around the high 50's early 60's mpg. The thing is that nothing different had changed in my normal driving style or traffic conditions.

I have scanned for any fault codes and there are no issues there, I've also checked the air filter to check for any obstructions, no problems there.

All I can put it down to is a bad tank of diesel from the usual supermarket petrol station I use.

Does anyone else think it could be some dodgy diesel, or anything else?

Cheers,

Buzz