The garde are as follows: 5w30 10w30(which i assume is the recommended) 15w40 20w50 Follow these grades and you should be fine. Remember to use semi-synthetic oil at least, and if money isn't issue I suggest you use fully sythetic oil, which is the best option out there. Regarding oil brand its according to personal choice really. You can have a look at other threads on this forum for ideas. Though, many have chosen Penrite and said that they're good, may not be the best. Anyone out there correct me if necessary please.