Idle
The new Scangage is awesome! One thing that is immediately noticeable is the difference between idle fuel rate when the truck is in gear or in neutral and cold or warm.
When cold, the engine idles at 1.2 gph in gear. It drops to 0.9 in neutral.
When warm (the 6.0 liter diesel/cast iron engine takes FOREVER to warm up) it uses 0.6 gph in gear and 0.4 gph in neutral.
Now I regularly put the truck in neutral at stop lights. This should have a significant impact, since my commute is stop-and-go.
And I'm thinking of an engine block heater.
And my next truck will have a manual tranny.
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