Hi. I am stumbled across this forum having had problems with my Mazda 6 Sport 2007. It too has had problems with the DPF. First time, the car was under 1 year old and was mainly used for my daily commute 30 miles to work. Thankfully the car was under warranty, but the car was with Mazda dealer and they had to replace some very expensive parts (sure they said 3k+). Anyway, that was fixed but same thing happened about 6 months later- again the part was replaced under warranty. It was same dealer and they did show some concern about the fault appearing again. They again said it was to do with the DP filter being clogged. Anyway, last week with no warning the DPF light started flashing (car is now 2 year 7 months and has 38k on clock). Car was collected by Mazda Assist who took it to a different Mazda dealer :?than before. They advised me yesterday that the DPF light has come on because it is due a service. They have said that the oil level is very high and they will carry out this service tommorow morning. I am pretty worried with my car's history that this is all it is.. But i will pay for the service and see what happens when we collect the car. Incidentally, Colliers Mazda who are going to be doing the service did say that this problem was occuring because the car is only doing "town journeys". The car does however about 5 journeys a month of 100 miles plus on motorways at 70mph. Anyway, should that matter? It is a family car. I will be happy to join your campaign as come July 2010 my warranty will be up and I am worried about where this will leave me..