Forcedinduction: Your confussing facts with your opinion.
The only lubricant my pump has is from the fuel, the only part recieving engine oil is the drive gear at the timming chain.87 300D Lubricity was a issue when the first 15ppm or less sulfur came out. Now fuel company's add it. Adding to injector cleaners can help a dirty system perforomance & MPG wise. I do agree a lot make false claims, but the lube issuies may take many miles and year to see results good or bad

 

Your posts are usely very good and helpfull, but you miss quoted me. I stated that the first less than 15ppm fuel had less lubrication. I did not state sulfur did or did not. My writing skills may be poor, but to state a fact you need to reference it from something, or it is a opinion or plagerisim. I'll have to get my cd's out and check on the pumps oiling. Just looking at it their are no external oil lines, and were it bolts to the block it can slide which could cause leakage. I find it hard to believe but not impossible.