I find that probably a hair high. I went from 0/5w20 to 0w40 in my Odyssey, and saw less than a 0.3mpg (mid-26s on both) difference that was more dependent on season than oil grade.
Depending on ambient temps, there may be some differences, but the thicker oil will run a little hotter and therefore be a little thinner than at the temps your thinner oil ran at. Wish you still had the chart; @dnewton3 is a master statistician and could have deciphered it if you had ambient temp data and a bunch of the other variables besides grade in the chart.
Depending on ambient temps, there may be some differences, but the thicker oil will run a little hotter and therefore be a little thinner than at the temps your thinner oil ran at. Wish you still had the chart; @dnewton3 is a master statistician and could have deciphered it if you had ambient temp data and a bunch of the other variables besides grade in the chart.
