change of fuel supplier blowing smoke

[wrighty]

since buying my bongo 3and half years ago ive always filled up at tescos after shopping (5p a litre off if you spend over 50 quid )this week when i was nearly on empty i noticed a shell garage with diesel same price as supermarket so filled up i noticed it said something like diesel extra on the pump within a few miles it was blowing smoke out like mad (everything else seemed same) still starts ok but smokes away like a steam train. could this be the fuel been better and its cleaning things out or has another prob kicked in just as ive changed fuel supply and type. as i said the engine seems fine no overheating or changes in power. views please thanks in advance (done around 40 mile since shell diesel)

[missfixit70]

Probably just clearing the crap out, how often does it get an "Italian tune up"? (dose of high revs to clear it out)

[francophile1947]

As Kirsty says, it sounds like it's doing the job it's meant to and cleaning your system out - just shows what muck the supermarket fuels are Use a couple more tankfuls and I bet you'll find it runs a lot better If you only run on diesel, you may well find a better fuel consumption as well

[wrighty]

i thought thats what it would be and after a run out and italian tune up(not heard that one b4 ) the smokes gone down by half thanks