Have a 00 Discovery II. The amber engine light came on. Dealer did various things but light kept coming back on. Dealer now recommends a valve job for sticking valves. Was planning on doing this in a week or so, but until then I put in STP gas treatment. Driving today and the light re-set itself. I'm way too cynical to think the STP cured it, but I'm holding out hope. Any one out there have a similar experience where the fuel treatment actually worked?
Jonathan
Jonathan