But they never said how much removed, did they? Sludge in modern engines is rare. Where you see sludge is in pre 1960 (about) engines with no adequate crankcase ventilation.M1 used to claim their high mileage oils will remove engine sludge within just one oil change. I wonder if that’s still on their site?
One product that I know works well is LiquiMoly OIL SLUDGE FLUSH, Seafoam may also work, but I'd put my money on Liquimoly 1st.Well, people claim it both ways, but nobody has any actual evidence that it does or does not clean? Why do some oils claim to clean out existing sludge?
This guy on Youtube did a Seafoam test, before and after, showing it cleaned up his engine. Not saying he's done it correctly or telling the truth, but it would be cool to find some before and after samples with just plain engine oil with short OCI.
One product that I know works well is LiquiMoly OIL SLUDGE FLUSH, Seafoam may also work, but I'd put my money on Liquimoly 1st.
That's pretty impressive miles on that engine! Good work.As is nearly always the case in these types of threads there is no indication anything even needs cleaning in the first place. If you're cleaning out imaginary sludge then any oil will do as long as you believe.
I can say this however. In my old "sludge monster" 1MZ-FE at nearly 450,000 miles there is no sludge. I've had the valve covers off numerous times, even posted pictures here at various miles (all since deleted from Photobucket unfortunately). I've even had the oil pan off once or twice. This was with running about a 7,500 mile OCI on mostly Mobil 1 with some Castrol 0W-40 thrown in here and there. I think your insistence on finding the magic video or picture is a wild goose chase since I don't see any oils doing a lot of "cleaning" in my experience. The pictures Overkill posted are pretty good but you dismiss them by saying they cheated? Who is to say anyone else posting such pictures didn't cheat just the same then? You're looking for magic where there is none to be had.
In the oil and gas production environment some wells have production tubing that gets deposits of paraffin, coal dust and other materials that basically becomes sludge, slowing the uplift and production of that well.Because it doesn't exist and never will (a legitimate one anyway that can be verified)
Oils by definition don't clean ( they keep clean- thats a big difference) That was specifically pointed out up thread. Oils are NOT solvents- they don't "clean" anything. detergents are not soaps- they are suspension agents.
So if an engine is heavily varnished with baked/caked stuff- no oil made operating under normal engine flows is going to clean anything.
At BEST it will "wet' it and rinse off the loose top layer. ( that's all the cheap flushes do too)
Anyone who wants to test that- find a dirty engine, pour that "cleaning oil" on a rag and have at it. It wont take long to realize that motor oils don't "clean" anything.
That stuff is for entertainment only. I recommend a use of the search function for "Project Farm" on here.This guy used seafoam to fix his rough running engine. Unfortunately, he doesn't remove a valve cover or the oil pan for closer inspection either before and/or after. However, in the follow up video he borescopes the engine one year later. He does a good job with product reviews. He has 1.5 million subscribers.
Or (I know this is highly controversial) just use a flush product whose purpose is....to do this...Engine oil isn't a cleaning solvent. Doing short OCIs specifically for sludge cleaning is a waste of time and money.
Do normal OCIs with a quality oil and forget about it.
In the oil and gas production environment some wells have production tubing that gets deposits of paraffin, coal dust and other materials that basically becomes sludge, slowing the uplift and production of that well.
do you know what the cure for these deposits is? A solvent? mechanical cleaning?, no.
the best solution is Hot oil circulation.
I have I just can’t figure out why people don’t like him. He shows how products work I especially like the ones where he actually test them in engines.