Aeration induced sludge information.
http://www.machinerylubricatio...oil-analysis-varnish
Take note to the references in the above link!
The so-called 'dirt' in motor oil(mineral/dino/G-III) did not come from the outside of your engine!! The source of dirt/insolubles is---the OIL ITSELF!! This is not new information! These particles are sludge/carbon are in fact-----ABRASIVE(cause wear),among other things!
quote:
The result envisioned is the creation of a submicron, carbonaceous resin particle at each location previously occupied by an air bubble. The degradation is a thermal-oxidative decomposition of the oil. These tar-like particles accumulate in the oil
because they are insoluble suspensions, they have a tendency to seek a more stable domicile. As they move about in the oil they make random contact with cool machine surfaces. The cooler oil at surface boundaries draws the particles near, to condense and adhere. One theory suggests that the particles migrate out of the oil by Van der Waals forces (weak attractive chemi-absorptive energy) while another considers electromechanical forces such as dielectrophoresis. Whatever the attraction, these polar microscopic specks of carbon matter will eventually adhere and populate the exposed metal walls. Initially the carbon residue may be gum-like and sticky but over time they can become thermally cured and form hard, enamel-like films.
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In case your wondering---Synlube does have anti-foam agents,unlike some other motor oils that do not,and yet needs it in the worst way!