WHAT have I done to you... WHY jump all over me for posting the TRUTH... 25 HP hr per gallon just AIN'T gonna happen with a conventional technology diesel, certainly NOT a 35-year -old one.
Yes, if you are pulling a light load, fuel CONSUMPTION will drop, but NOT HP hrs per gallon. In many cases it actually INCREASES under lighter loads. Besides the engine likely not being as efficient, parasitic loads such as the cooling fan, charging system, hydraulic system, and transmission losses consume a greater percentage of HP/fuel at lighter loads.
Fuel consumption in units per hour is MEANINGLESS as a measure of efficiency because there's no correlation to work actually being done.
HP hrs per gallon measures actual WORK being done against the fuel it takes to do it.
And the NASTY comment... "Of course Bob I realize all you know is what you read." is CERTAINLY unwarranted.
I'd venture to guess I've spent more hours studying, operating, wrenching on, or driving diesels than a good percentage of the population and KNOW from experience there's a limit to fuel efficiency, especially with old/conventional technology!
And, it seems you would make a mockery of the serious and detailed work done by a long succession of learned folks at the University of Nebraska. It's good to know you are FAR smarter than they, as well!
You simply cannot defeat the basic rules of how this stuff works, (except at the coffee shop or bar or on a message board)!
I'll end my RANT now and let you get back to ignoring the facts and pulling figures out of thin air!
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