Yeah, ive known about this for years, but people swear blind it doesnt happen. My mate had a bike a few years back, brand new, and after 15 months or so it started misfiring. He took it into the dealer (cant remember who, was local though) and they booked it in for inspection.
It turned out he had water in the fuel system. They asked him had he been using Tesco for his fuel. He had started using them about 6 months prior to this cos his Tesco credit card gave him money off or summit like that.
They said they had seen a few cases where people had water in the fuel system and in every case, they had been regular customers of Tesco/mainly used Tesco. Obviously they could'nt officially blame Tesco, but so far as to say, it does seem water is in Tesco fuel somehow.
Some people dismiss the idea altogether, others say it is because Tesco water the fuel down, however the most plausable theory I have heard is that Tesco (or Greenergy or whoever it is that Tesco own and use to source and transport fuel) use the same tankers for both diesel and petrol transportation, whereas other retailers/companies use seperate tankers. When the tankers are going to carry say derv after delivering a load of petrol, they flush through the tanker with water, or a water based fluid, to clean out the tanker. And there must somehow be excess water left in the tanker, sometimes at dangerous levels.
Im not sure if any of this is true, but it seems more than a co-incidence to me, that quite a few people have had/know people that have had, problems relating to water supposedly being added to Tesco fuel, whereas you don't here of it from other big brands?
Hmmmm
