Quote:
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Originally Posted by mptoledo
"Sludge formation begins when the chemically suspended particles of contaminants begin to settle out of the oil. It's a fairly daunting task for engine oil to suspend all the contaminants thrown at it, and any engine oil can do this successfully to a point. Pennzoil, and some other quality motor oils, are able to perform this task more effectively and for longer periods of time. But eventually, if the oil is not changed often enough, a "breaking point" will be reached. This breaking point is either when there are too many contaminants to handle or when the oil's chemical defenses are weakened, and it is caused by two main things: excessive accumulation of contaminants in the oil and chemical changes in the makeup of the oil itself (depletion of the additives and oxidation).
"As more particles are suspended, less of the additives are available to do their job. Knowing this makes it easy to see why too much time between oil changes can be one cause of the oil reaching its "breaking point"."
http://yotarepair.com/sludge%20article.html |
I totally agree with the above....
IMO, the solution is an easy one....I would (and i always do-regardless of whatever car i have, and oil i use) change my oil at closer intervals rather than sticking to the dealer recommended oil change interval. This way i know that there are LESS contaminants, and lesser chance of sludge formation.
Dino oils have a recommended oil change interval of 3k miles (which was the common accepted "rule" for decades)....With the advent of better Synth oils the "average" oil change interval is around 10k miles ......I personally change Synth oils NO MORE than 7k miles this way i know that i am always below the recommended interval.
BTW, engine design could, and can also contribute to sludge formation (crankcase breathing design, etc....etc).