Maybe this question have been asked, but if not, I ask it now. What is simply the best engine oil brand to use on: 1-2.2/2.5 2-V6 3.0 Or any other engines powering the EEK cars. And should we use Lucas additives (Me, I say a big NO!!! But if anybody have something to say about them, please say it) The oil for winter should normally be 5W30 (unless you live in southern USA), but how about using it in summer? Any comments on this?