I just bought an 02 Honda Odyssey with 36k miles. Most cars I usally keep to 150k and beyond, but Im not sure about this one. We may go up to 80 to 100 or we may to beyond. My delima, If I could afford to, I would run M1 5-30 oil and be done with it. But I cannot afford the M1. I need a 12.00 per 5 qt or less oil. The honda specs 5-20. Ive seen some castrol gtx, penzoil in the 5-20 and some castrol semi syntec in the 5-30. Thanks for any advice or suggestions.