Got the car back, what a difference, can't believe the power for such a small engine. I took it to another garage to check it out. The mechanic was a 500 expert who talked me through the engine hooked up the computer and confirmed the work had been carried out. He has had quite a few cars in from other garages who have put in the wrong oil, he has drained replaced with no further problems from the cars. Also told me that them engines use oil, can use about a litre about every 1500 miles.