When the oil I'd chosen to order on line, turned out to be incorrect when I went to collect it, they managed to create a fake customer order and honour my Summer43 discount of 43% off. Unfortunately this is almost always the problem. The information if you put your reg in, brings up parts and oil that are not as recommended by the manufacturer. In this case my Mx5 should take semi-synthetic, and the details on line don't tell you you are ordering fully synthetic, and my astra should take fully synthetic and the details on line don't tell you you are ordering semi-synthetic. It's obvious when they hand you the containers, so then you spend 15 mins whilst they attempt to make it right. Grr.