Big economy loss

[Matt]

I used to get around 700-800km from a tank of diesel, now im getting around 400km...

Nothing logical springs to mind, new fuel filter, serviced recently, it has been driven less than it used to be but only sits between uses a maximum of a week, I dont think that would cause the change.

Any idea's? It's using a little bit more diesel as my bro's V6 petrol surf is using petrol to achieve the same!

Matt

[geeves]

There isnt a fuel leak by any chance due to the new diesel is it Also is it smokeing more or less power

[Matt]

hmm interesting...nope no obvious solutions Alan. I usually fill up at G.A.S because they have had the low sulphur stuff for a while now, theyre supplied by BP and go BP sometimes too, thats what I got the economy from, the bad patch i had there was with Caltex fuel...i used BP again today and back to normal...the only difference to anything was the fact the fuel was from Caltex...odd! because supposedly the "big four" (shell, caltex, bp, mobil) all get fuel from the same tanks!
Must be the different additives they each put in after that point...mine didnt like caltex ones!