I recently bought a Forester which has been diagnosed with 'Diesel Bug'. So far the filters have been cleaned and the tank drained but it keeps coming back. The local Subaru garage doesn't seem to have any ideas apart from a diesel system cleaner but that doesn't have any biocide properties. Has anyone else had this? Can anyone suggest any treatments. So far it has been expensive and unsuccessful.

Hi Jane sorry to hear about the bad new's :( I've only ever heard of boats getting it :( And with everything you have said not sure I could suggest anything else other then what you have had done. 

Wotcha and welcome Jane - when boats get it they have to clean and flush the whole system flushing it alone will not clean it also many treatments are designed as a preventative action and can only be used once it has been cleared of the wee beasties.

 

Ill do some digging and see what they use in the Navy to get it cleared as I know it is a pain once its in there normally from foreign fuel supplies

Ok so had some feedback and you would only get enough to treat a 1000 litre tank from my contact - over kill I thought but here is an alternative

 

they are called fuel biocides...

 

http://www.ebay.co.uk/itm/Wynns-Fuel-Biocide-Petrol-Diesel-cars-boats-bike-trucks-marine-wynns-outboard-/171140555217?pt=LH_DefaultDomain_3&hash=item27d8c5a1d1