Whats the formula for calculating hours to miles?

If anyone knows.. 21,000 HR = Miles?

Thanks

 

You need to know miles on truck and you can calculate average miles per hour. Hard to calculate miles not knowing what speed the truck was driven. I think at my company the "standard" guess! is 40 miles for every hour. That being said you would have 40 x 21000 =840000 miles.

 

Well, if you averaged 1 mph for 21,000 hours then you have 21,000 miles.

But, if you averaged 40mph then you have 840,000 miles.

There's no formula. To many variables, it can't be done.


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They are shunt trucks too that makes it even harder!

 

For tractors the common conversion is 50 miles per hour.

 

The formula on the Dodge is turn on the key and set the odo to total miles. Then hold the button in for about 5 seconds and it will display hours.

Mine is 41.3 MPH average.

For going hours to miles it's just a wild guess. Wouldn't it be better to do maintenance based on hours?

John

 

Thats what I've always been told, as with mileage you cant tell how long an engine spent idleing

 

I know Cummins used to use 50 mph for their use but I imagine that was on OTR trucks which would be higher than most pickups.

 

firetrucks is 35 mph for every hour of run time

brett

 

That sounds way too high for a pumper in a busy house.

 

we do maintenance on hours.. I am just trying to get an idea of the milage.

Both units are 21,XXX hours.

looking to freshen them up some.

 

21000 hours on the original motor? No major work done, like an in-frame overhaul?

chaikwa.

 

one of my trucks is at 29 mph and the other is at 37 and most of that is hwy driving with very little idle its lil over a hour trip to work 3 stop lights and like i stated very little idle. Even in the winter its only about 5 minutes at the max and thats just so the engine and tranny can get things movin and dwarmed up a bit

 

On their gensets Cummins recommends oil changes every 250 hours.
These are engines that are under the same load most of the time though.
My feeling is an engine that idles more probably needs servicing sooner than one that's under load.

 

No major engine work done, just rear axles and transmissions.

They are serviced now every 300HR which is every 13 Days. (Lube, oil, filters)

They should have had synthetics in them to avoid having to do the oil so often but that was the routine well before I took over.

I know synthetics are compatable but is it something worth doing after its been conventional oil for so so long? I was thinking Semi Synthetic to add some wear protection since they are getting up there in hours and I need to extend the engine life as long as I can as winter is our busy season.