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Diesel, oil, and additives

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1999 2500 HD transfer case leaking

NV4500 rebuild lost 3/4 gear

When a fill-up saves me over $20 and I receive the same power and mileage. Yup, getting something back.

I ran it routinely in my 05 one summer when I was in AZ for the 60 course. I got better mileage, it was cheaper, and the motor was quieter. Wins all around.
 
Welcome Frank. I am up here near Priest Lake. When I bought a rebuilt VP44 from Oregon fuel injection, they told me that I should put Stanadyne's Lubricity formula in each tank. That todays fuel lacked the lubrication qualities and they were seeing wear inside the pumps from this. Especially the rotor heads. So given how much that pump cost me, I put it in.
This stuff.
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I recently stopped at a Texaco station and noticed, after I had started fueling that I was filling with B20. If I remember correctly, Cummins does not approve the use of B20 in these engines.
Californian here. I've been running renewable diesel for months now. Performance is the same,same number on the lie-o-meter,but way less diesel smell. Filters have been changed recently and they were great so no scouring action I guess. Whatever's cheapest and they pump a lot is wha I go for. The renewable's subsidized here it's competitive. Big trucking companies have been using it for years now since the DPF's came out. I used to go to Baja all the time and the diesel down there was ours courtesy of Bush Jr. signing an agreement. I got better fuel economy down there. I think it didn't have so many additives. It was ULSD.
 
Welcome Frank. I am up here near Priest Lake. When I bought a rebuilt VP44 from Oregon fuel injection, they told me that I should put Stanadyne's Lubricity formula in each tank. That todays fuel lacked the lubrication qualities and they were seeing wear inside the pumps from this. Especially the rotor heads. So given how much that pump cost me, I put it in.
This stuff.
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My buddy used that stuff from new on his 1999 and the VP44 still died at 135K. He had a fuel pressure gauge too.
 
My buddy used that stuff from new on his 1999 and the VP44 still died at 135K. He had a fuel pressure gauge too.

For years there was much emphasis placed on lift pumps and poor lubricity in fuel causing VP44 pump failures. What was unsaid from Bosch during those years was that those early VP44's had quality control issues internally which made them doomed for failure. Things like rotor seizure (rotor not de-burred when machining was completed), plastic diaphragm failure for high pressure pulses, timing piston failure (substandard piston bore material), and solder issues in the PSG - to name a few. Bosch fixed all of those deficiencies through updated rebuilds without notification to the end user, so lift pumps and poor lubrication continued to be blamed for the cause of those failures.

Reputable VP44 pump re-builders sell pumps that are complete with a new PSG and all of the updated Bosch internal parts. The pump is run on a Bosch test stand for a few hours and the PSG is calibrated to the pump. These re-manufactured pumps are very reliable without the addition of higher volume lift pumps or fuel additives. I know - I have one that was installed under warranty in 2005 and currently has logged over 288,000 miles with lift pump pressure averaging 3-10 psi and no fuel additives.

- John
 
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