According to Blackstone the universal averages for the Honda 2.4 liter Earth Dreams DI engine are based on approximately 8000 miles, so I made this change as close to that mark as possible. The vehicle was purchased just a little over a year ago as Honda Certified Pre-Owned. Sample #1 was whatever the dealer used when certifying the vehicle. Samples #2 and 3 are both M1 0w-20 Extended Performance. I was a bit worried after sample #2, but the engine seems to have come around. Presently there is M1 5w-30 EP in the sump, but these results are encouraging enough to swith back to 0w-20 for the winter months.