Which (non-synthetic) 5w30 motor oil do you fellows recommend for my Honda Accord? I am guessing the "big oil" brands like Exxon, Mobil, Texaco, Shell are all the same - they seems to cost the same - and they are the least expensive "brand" names. Then there is the next tier with Castrol, Penzoil, QS, Valvoline, etc - that are about 30 or 40 cents more. I know part of that must cover their advertsing / sponsorships, etc. So which are the "better" ones to use. I don't mind payng more if I am getting more. Thanks!