I'm not saying the minder will "sense" the difference. I think they'll change the programming to reflect that more durable oil is now specified.mileage minder comes on about 7000mi, regardless of mostly city driving or distance (we goto kansas/back, avg. 2000mi)
doesn't matter oil visocity or time frame.
The 0W-20 is synthetic and will take the heat no problem. At operating temperature, they are both 20, so no difference there. A 5W-30 would be thicker as you said, but Honda doesn't recomment that grade. Stay with the 0W-20.I live in Houston and have been using 0W-20 in my 2004 Oddy for about 6 months now. That said, because of all the heat we've been having down here, I thought about going back up to a 5W-20. Would moving back up to a 5W give it a little more thickness to help out with the heat or would that only be accomplished by moving from 20 to 30, which I wouldn't think of doing with this engine. Thoughts????