On the ds4 dealing with E85 or gasoline:
E85 is obviously ethanol. Most gasoline we can buy throughout the continental US has 5-10% ethanol in it. Same for diesel. That is the “oxygenated” thing they have listed.
It slowly degrades the aluminum housing of the pumps. If you keep inlet pressure up and add lube like you are supposed to, it slows this. But if you get fuel algae it tears everything up in a hurry.
As to would it withstand the E85/ gasoline- ummm- not really supposed to compress gasoline to the roughly 4,000 psi that this pump does. I can’t understand why anyone would want to. Running it into the engine like an accidental fill up won’t normally destroy them right away- but the engine stops running because of the gasoline.
The two fluids are MUCH drier than even the crappy corn diesel. So the hardened parts would help with it some.
Then there is questions of the sealing components. Idk what material they are made of. But Viton is what is needed to withstand it. Thats why the factory fuel hoses fail and now should be replaced with sae30r9 or greater- it is viton based.
As to the hardened parts (arctic kit) being a solution- not completely. It limits the wear (aka slows it down) but doesn’t stop it. Absolutely make the investment, but still add the lube. It doesn’t eliminate the issue.
As to no new hard parts for db2- I believe they are still available. The new db2 being built for hmmwvs all have them. So you can buy brand new db2 no problem. Even if the military goes with the new fuel system they are testing, the db2 & related injectors & lines are supposed be available for 10 years according to military contracts. AM General has continued to make available to the public all unregulated (no armor stuff) parts to the public. I see no reason they would end that.
As to Stanandyne wanting to kill it- meh- there just aren’t many customers anymore. There comes a point where the profit isn’t worth it. Like Ford selling seats for Model A rigs.
's the bed.