oil is based on where you live.

i use mobil1 10w30 in my integra because i burn thru 5w30 like it's water, after 2k miles i'm down a quart or two.. i also dont mind because where i live the temperature when i'm driving the car in will only be below 20 maye 5 times a season. now as for 0w40, i wouldnt even go near it for honda 4 banges, use either 5w-30 or what honda suggests. that is unless you have tried other things out and foudn them to work well.