Quote Originally Posted by Tone
Use a quart of engine oil flush avail at any autoparts store before you drain the oil - follow directions, do not drive with this in. I run a qt of diesel through before every other oil change as it is cheaper and accomplishes the same thing. You might want to do it every time you change your oil to clean away the excess. sludge.

I would not add diesel to your oil PERIOD. Anything that will thin out the oil is bad. Even at an idle.There are plenty of detergents in the oil already.With regular oil changes there should be no need for this.The only way you would know for sure if you are doing any damage to your engine would be to have x-ray vision.Unless you look at the bearings and seals, before and after you do this.As far as it not being rocket science, if you think about it ,when that qt of diesel fuel goes through the bearings before it mixes completely with the oil I would think this to be a BAD thing. And just because you do it in your $65,000 MB does not mean squat.It does not prove that it does not do any damage.And by saying what you said above " I run a qt of diesel through before every other oil change as it is cheaper and accomplishes the same thing." is saying use diesel fuel. shawn