[slowmover]

Originally Posted by MetroMPG

Is this a HD truck-specific comment? Because it's demonstrably false in a car.

Manual vs. automatic transmission MPG showdown: Nissan Micra 1.6L

The truck is 9,000-lbs. And I can upshift at 1,300 if I choose. Slow? Ha! Glacial.

The approach is to stop acceleration about 10-12/mph below target. Sort of drift upwards with terrain.

In town it’s related to gear choice. Not easy to stop that mass. So sometimes a lower gear (it’s happy all day fuelwise at 17-1900. Even though it can lug along at 1,100).

The only thing that works is to glide. And autos are better at that. Same with this Peterbilt I’m in. Also an auto.

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