Yes, if we were talking about salad dressing. But engine oil and water? At operating temp there is only water vapour and engine oil, likewise the oil always displaces the acid water on metal surfaces, regardless of the suspension's homogeneity - However, my point was that unless we have empirical evidence we are both speculating here, probably speculation that favours the oil industry and not necessarily the engine.
If you are referring to "oil sludge" there are other factors and explanations to consider, I believe.
Yeah at operating temperature....change your oil hot. Get it?
I don't get the "carbon in the oil". If oil goes past the piston rings or valve seals, oil is burnt. It is not the gas that goes past the rings; it is the oil that goes past the rings. The force of the explosion forces the piston downwards, and the piston creates pressure in the crankcase. Does really exhaust gases go to the crankcases? Or the smoke is just from the hot oil smouldering?
Yes its combustion gases. No ring system is totally sealed. Some combustion gets by. Thats why modern cars have a PCV to keep from pumping it into the atmosphere. Those hot gases and the rings will cook oil.
Another area of contamination is valve guides and seals.
Back to the oil, it is true that heavy particles sediment in the oil sump. Would the oil warming help in getting rid of them? I don't think so. The oil pan in my CB350 was full of sludge. But the oil pump is far away from it. No warming will make that sludge go to the oil pump. I get the "orange juice" example, but unless you lift your bike and vigorously shake it up and down, left and right, like a juice bottle, no oil circulation will help you dissolve the sludge in the bottom of the oil sump. Like if you drink the juice with a straw that only goes halfway in the bottle. No matter what the juice temperature is, if you stir the juice you will only stir and heat the upper layers, not the lower sediments.
Once the sludge forms...short of some type of cleaning or flush...your screwed. Point of changing hot is to minimize the sludge formation. Hot oil is alot better at suspending the crap in your oil. If you stir orange juice do you not get even some lower sediment? Yes you do.
New engine...hot oil changes...minimual sludge.
IMore "conventional wisdom": What about bird#$%* in the paint? Is it really that corrosive? Has somebody first-hand experience of faded paint due to bird #$%*? Swallows #$%* in my air conditioner external unit, the guano stays there for months and gets cleaned with the rain and I haven't noticed any difference in the paint. And we are talking a single layer of paint in an air conditioner, not the candy + colour`+ lacquer. Is the bird#$%* a myth of the conventional wisdom or there is truth in it? What's the difference between bird and human "residues"? Why should the bird residue be more corrosive than any other animal's?
Depends on the birds and what they eat. Also depends on the paint. Yeah I can walk outside and take a picture of the bed cover on my truck. Leave certain bird #$%* on it and it will break down the clearcoat.
Certain type of blackbird we have down here feast on oranges. You can bet its acidic.
Another example of "conventional wisdom". How many of you cut the plastic rings that keeps the six-packs together? You are very environment-conscious so you are avoiding some poor fish getting caught in this improvised net. Now think for a second where your garbage go. Do you think for a second that the garbage truck dumps your garbage to the ocean? It gets separated in its very first stage -we in Spain have different containers for plastics, paper, glass etc. And each type of residue goes to a different recycling plant. Irrespective of the plastic rings being cut or not, it will be recycled and will only see fish if it gets the form of a inflatable raft.
Yeah the rings make it into the ocean...never underestimate drunken sport fishermen. I doubt the ones in your recycling or trash make it there.
Anyways.....
Don't believe in contamination?
I'll give you and example.
Aircraft piston engines. Very similar to Air cooled motorcycle engines.
Lycoming, Continental, and Pratt and Whitney recommend hot oil changes.
Not the oil manufacturer...the engine manufacturer.
heres a qoute:
http://www.lycoming.textron.com/support/tips-advice/key-reprints/pdfs/Key%20Operations.pdf"Another contributor to a variety of engine problems, including valve sticking, is frequent long periods of inactivity. An engine should be flown regularly to stay in tiptop condition. The oil in the sump collects residue from combustion such as moisture, acid and lead sludge. Flying the aircraft tends to heat the oil enough to vaporize the moisture and help eliminate some of these contaminants, but an engine that is not flown will collect
moisture, acids and gums which may contribute to corrosion
and to valve-train problems. In addition to frequent flight, these contaminants are also eliminated from the engine by changing the oil."
"Some operators are running the engines on the ground in an attempt to prevent rust between infrequent
flights. This may harm rather than help the engine if the oil temperature is not brought up to approximately 165˚ F, because water and acids from combustion will accumulate
in the engine oil. The one best way to get oil temperature to 165˚ F is to fly the aircraft. During flight, the oil normally gets hot enough to vaporize the water and most acids and eliminate them from the oil. If the engine is merely ground run, the water accumulated in the oil will gradually turn to acid, which is also undesirable."
