quote:A residual bottom sediment isn't just in long-standing M-1, either. I've seen a fine, dark sediment in Proline, SuperTech, Chevron Supreme, and Mobil Drive Clean, too, if I don't invert the unopened bottle and shake. (I believe by inverting and shaking, the result is a more vigorous sloshing action to bring the sediment back into suspension faster.) To those who insist that there're no particulates in current motor oils to settle out, I'm not trying to start an argument. I'm just reporting what I've seen and personally verified with strong light shined into an unshaken, drained bottle. On another occasion, I poured a small amount of lacquer thinner into an unshaken, drained bottle and shook. Then I poured the contents into a clean small glass bottle. The very slightly hazy shaken fluid fully clarified after several weeks with a thin sediment layer on the bottom of the tightly sealed glass bottle. There may be another explanation than intentional particulates from the oil manufacturer, and I'm open to comments. In the meantime, I intend to continue shaking my oil before pouring it into my engine. It certainly can't hurt anything to do so. -Ray Haeffele
Originally posted by dickwells: Otherwise, how do you get those black specs out that I see in the bottom of Mobil 1 Bottles?
quote:I have, and in Mobil 1 SuperSyn. My question: Is this additives that have come out of suspension/solution? [ January 30, 2003, 11:50 PM: Message edited by: G-Man II ]
Originally posted by MolaKule: It won't hurt anything by shaking, but honestly folks, I have never observed sedimentation in any modern motor oil over the last twenty years.
quote:FWIW, everytime I'm in Wal-Mart I pick up a few bottles of the QuakerState that comes in the clear bottles and I've never seen any sediment in the bottom. I guess when you put your oil in clear plastic, you take the necessary step to make sure sedimentation doesn't happen.
Originally posted by 2K2AcuraTL: My .02c worth.. I found a noticable deposits in Quaker-State and especialy in Castrol (synth). J