Viking Paul, bring it down a notch mate, I never said I objected to paying £7a LT for oil. Fact is I'm completely ignorant when it comes to engines hence I asked the question. I didn't want to pay out for expansive oil only to find out latter your only paying for the brand name. Now I know better I shan't cut corners. My hand book doesn't actully say what grade of oil to use, only make Shell Helix,it just gives you a chart with differant temperatures and grades and then leaves you to work it out for your self. From what I can see plus the advice from above a 5w30 seems to be the one to go for. Trouble is the gentleman above recommended 5w30 FULLY SYNTHETIC and I can only find 5w30SEMI SYNTHETIC. 10w40semi synthtic isn't on my hand bookchart.Any advice on this. Thanks for the help and patience. Edited by: Denny1