A thought that goes against the norm!
All, Thought I would post a thought I had that goes against what everybody does: Conventional wisdom and recommendations say to change your oil after you have brought the engine up to temperatur...
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For those of you who think that soot regularly settles out of the oil or gets trapped in the oil filter, clearly, you've never taken apart an engine made within the last 30 years that has been reasonably maintained.
The reason the oil gets black in the first place is because the soot particles remain suspended in the oil. (by design) Google "oil dispersant" and learn what they do (and how they work) in modern oils. Soot particles are are sub micron in size. (30 microns = .001") Most quality OEM oil filters are good to about +-30 microns (or about .001"), no more, unless you buy a super premium oil filter (like Mobil 1 which are good to about 10 microns) which simply, isn't needed in most automotive applications. Soot particles are far too small to be filtered out by resin impregnated pleated paper oil filters which is WHY the oil once black, stays black. Todays oil dispersants are designed to keep soot particles from agglomerating (growing in size) and to remain suspended in the oil. Soot particles are far smaller than the tightest clearances in most modern engines until the dispersant additive becomes saturated. It's at that point where the sub micron particles can begin to grow causing engine damage and plating out like paint on internal engine surfaces. That, among other reasons, is why you need to periodically change your oil. If you see sludge forming inside a modern engine, its because the oil is breaking down and combining with soot to make a nasty sticky mess.
Chum lee
The reason the oil gets black in the first place is because the soot particles remain suspended in the oil. (by design) Google "oil dispersant" and learn what they do (and how they work) in modern oils. Soot particles are are sub micron in size. (30 microns = .001") Most quality OEM oil filters are good to about +-30 microns (or about .001"), no more, unless you buy a super premium oil filter (like Mobil 1 which are good to about 10 microns) which simply, isn't needed in most automotive applications. Soot particles are far too small to be filtered out by resin impregnated pleated paper oil filters which is WHY the oil once black, stays black. Todays oil dispersants are designed to keep soot particles from agglomerating (growing in size) and to remain suspended in the oil. Soot particles are far smaller than the tightest clearances in most modern engines until the dispersant additive becomes saturated. It's at that point where the sub micron particles can begin to grow causing engine damage and plating out like paint on internal engine surfaces. That, among other reasons, is why you need to periodically change your oil. If you see sludge forming inside a modern engine, its because the oil is breaking down and combining with soot to make a nasty sticky mess.
Chum lee
