vc,
I sent you an email, but here is the same information edited a bit to clean up some cut-and-paste problems.
You should have no problem for using Jet A in your 1997 Ram.
Cummins bulletin 3379001-05 (Dated 01-Jan-1995) lists Jet A and Jet A-1 as acceptable for the P7100 pump as long as the fuel meets the lubricity specifications for Cummins engines. The lube spec requires 3100 grams (grams of what it doesn't say - Dave) or greater as measured with the U. S. Army scuffing BOCLE test or Wear Scar Diameter less than . 45 mm at 60°C (WSD less than . 38 mm at 25°C) as measured with the HFRR method.
The typical spec for Jet A and A-1 is 1600 grams based on the U. S. Army Scuffing Bocle test, so you will probably need to add a suitable lube to the fuel.
Fuel mileage will be 5-10% lower with Jet fuel. (who cares if the price is considerably lower!)
For lubrication, you want to add an ashless oil that will not leave deposits in the injectors. Best choices (in descending order of preference): any quality lube additive specially formulated for diesel engines, marvel mystery oil, 2-stroke engine oil, SAE10 non-detergent engine oil. Be aware that 2-stroke oil and many engine oils contain enough sulfur to kill your catalytic converter. NOTE: if you still have the cat - I would recommend that you loose it or gut it before switching to alternative fuels (oops - I didn't really say that, did I?).
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Regular engine oils can be used - but they usually contain more additives than non-detergent oils. Use a single weight SAE10 oil to avoid the extra viscosity improvement polymers used in multiweight oils.
ATF must not be mixed into the fuel because it contains friction enhancers and other additives for the clutch packs. All gear oils contain way too much sulfur and phosphorus.
Dave
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1994 2500HD 4X4 modified for off-road camping
2001 2500 ETH/DEE QC SB 4X4
Fritz's DodgeRam.org