Originally Posted By: leroyd92
My uhaul mechanic was once an emissions tech, he said the go to way to totally clean out a motor that is neglected to no end was adding diesel fuel to the crank case for a short amount of time...
IM not going to tell what he did as a tech when a nasty varnished motor came in to prevent a fight on bitog.
He did however, buy an s10 with 24xxx miles on an oil change, the motor was disgusting on the inside. He drove it around with 3 quarts of 30wt and 2quarts of diesel for about 2000miles till the oil was black, he changed it out and ran the hdeo 1030 and the truck now has like 190k and it runs like a top... he claimed the hdeo didn't have much to clean afterwards, and the diesel was the go to thing for flushes.
The local autos teacher at my high school helped some of my friends do the ( 30 minute flushes )where you fill the crank case with diesel and let it run for a minute at a time. After 30 starts the fuel is black and the motor is spotless inside.
Many will disagree, I can only speak for what I've seen
He must be extremely lucky
One of the consequences of failed regen in a dpf equipped diesel is diesel contamination of the engine oil.
Sometimes the oil takes on the appearance of black vaseline
Other times the lack of lubricity causes the engine to sieze.
I have seen engines with less than 10k on them, 6 months old, go bang and parts of the bottom end exit the block.
I also seen one engine that was suffering loss of power, when the engine was stripped the cam was showing tell tale signs of lack of lubrication and was pretty close to siezing in situ. That one needed a new cylinder head
If your vehicle needs to have a forced regen due to excessive soot loading in the dpf then an oil and oil filter change is standard practice to get rid of the diesel contaminated oil before it damages the engine.
I think this person might have been pulling your leg.