Talking out both sides of the mouth, that's what I love about additive "experts". It seems to be the go to for additive lovers to claim the p7100 is exempt from lubricity requirements. The fact remains that the P-pump wasn't designed for ULSD, period. I'd love to see something scientific to back up your claim that GM 6.2 and 6.5 diesels need lubricity fuel additives to prevent having to replace expensive IPs. You can't provide it because it doesn't exist. You are only repeating a anecdote that has it's origins in the ATF is a good diesel additive arena.Well if you have any experience with other older NON P700 pump diesels running a million miles. With no additives Please post it up.
I Have ran GM 6.2 and 6.5 diesels for over 20 years and beieve me. They do need lubricity fuel additives to keep the pumps happy. Unless you like replacing expensive IPs.
Go to the Diesel place in the 6.5 or 6.2 forums and post up what you just said. You will be laughed out of the place.
The P700 is a tough pump. The thing is huge compaired to a Stanadyne used in GM and older Fords. And is is a completely different design and operation. You cant compare them. Other pumps are not as tolerant of ULSD and all the contaminates it contains. Than the P700 monster. That will eat most anything. That is why I like it.
Altho this link is for storage tanks. And is explained in very simple terms. It does tell about how crappy ULSD without additives is for your fuel system.Ultra Low Sulfur Diesel (ULSD): the Good, the Bad, and the Rusty What comes out of those tanks goes thru your engine.
Your little article doesn't impress me and has no reference material to back up it's statements. Yes, removing sulfur removes natural lubricity compounds. At least the writer didn't claim that sulfur is a lubricant. That one cracks me up. Nowhere is it noted that lubricity additives are added prior to being sold commercially. That is called lying by omission. Since they lied about that, what else in the article is a lie?
Bottom line is 12 valves have p-pumps. This is a 12 valve forum. What you dump into the fuel tanks of your old GMs doesn't interest me.