I can refute that rumour for you, mine has run on mainly Tesco diesel for almost 100,000 miles without any problems. No smoke on start up, no smoke at almost any time except under full throttle acceleration and cold starts are instantaneous even in that Siberian weather we had last winter. Current mileage is 188,000 and counting !Citroenmad wrote: Ive heard HDi injectors, and a lot of modern injectors, are ruined by cheap supermarket fuels, so that is excuse enough not to use it.
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Fuel marketing is all smoke and mirrors, the oil majors know all the tricks to open your wallet. If supermarket fuel was half as bad as some make out they would have serious problems on their hands with lawsuits for damaging engines. Also, what about those that run theirs on WVO, there can hardly be any less quality assured fuel than that ? Although obviously that cannot be used in a common rail diesel.