What is a good mileage to engine hours ratio?

For reference I bought mine with 950 hours and 51,000 km. Today I am just shy of 5600 hours and 427,000 km. Yielding 76.25kmh or 47.25 mph. I only idle in the coldest of winter nights maybe 10 a year. And keep my speed around probably 63mph for a moving average. I don't shut it off when fueling or otherwise a short duration, I'd rather keep the coolant flowing. I pickup idle time waiting in line to cross customs as well, probably 30 min every crossing on the average.

Yours is estimated 40.9 mph. Not horrible, could be better. Personally I wouldn't sweat much over this data alone.

 

I agree. I don't run areas at times that require a.c. for sleeping. An apu for me would be 500 pounds of dead weight. Bunk heater and a reefer engine for a jump if needed. If a.c. for sleeping was an issue I would certainly have an apu. I have an inverter for a laptop and microwave. Otherwise my household electric needs are minimal.

I am convinced my isx at idle is closer to 1.5 or even 2 gallons per hour. I don't idle enough for accurate numbers, this is only my estimation from a handful of fuel ups that included a 10 hour idle and rough estimated diminished mpg numbers. All my emissions systems are intact. For the time being.

 

I bought my truck brand new in 2013 (December). It’s almost 5 years old. I strive to make 400 hours=20,000 miles. I’m a little behind on miles (about 1,500). It will hit 10,000 hours about a week before it rolls 500,000.

 

There isn't any.

The hours you need to concern with is the idle hours, not the total hours.

Idle hours are the indicator which tells you how much idling (washing of the cylinders) have taken place. This is where it matters.

 

50 mph is about average for most over the road trucks that haven't seen an excessive amount of idling. Mine had around 19xxx hrs when it hit 925000 miles at that time when we checked it.

 

Given that both parameters are available, how to understand what I’m seeing?