went to Trax today and on the way home the engine kept cutting out unless i kept the revs goin by using the accelerator.

its as if there is no oil pressure but i have checked and none of the hoses have come off and there are no obvious signs of an air leak.

This morning i did fill the car up using Tesco 99 S U/L would this have any effect on the car at all?

The car is fine apart from this; no problems what so ever.