My 1996 Corsa 1.2 would never run properly on supermarket petrol. I stopped using supermarket petrol and after a couple of tankfulls of decent petrol it always ran perfectly thereafter. I'd never use supermarket petrol again unless it was an emergency.
However, my son's car, a 1.8 Vectra runs ok on it.
My friend had an Astra 1.6 16v which had a problem with sticking valves. He got rid of the car in the end because he didn't want to go to the expensive of removing the cylinder head and replacing all the valves. I suspect that was exacerbated by using cheap petrol which allowed deposits of burnt carbon to build up on the valve stems. Reports of 16v Astra's suffering from the problem were quite common as I recall.
Worth a try using Texaco, BP, Shell, Esso or Total don't you think?
ChicksFan
March 2011
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