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Your riding buddy has some interesting points, here are my thoughts: Detergent oils work by trapping the dirt and returning it to the filter to be removed (the larger particles, anyway). When your buddy allows his bike to sit overnight before changing his oil the dirt particles trapped by the oil all settle out, to the bottom of the oil pan. When he drains his oil do all of these dirt particles wash out? Nobody can really answer this question. By starting your engine and allowing it to warm to operating temperature the oil will pick-up all these dirt particles and suspend them, and I believe resulting in a more thorough removal of the dirt when you drain the oil. The warmer oil temperature will suspend more dirt also.
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I'm no expert, but I'm going with Dave on this one.
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So...I drop my bike off at Honda and they do the oil change. I prefer to do this when it's cold outside.
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I posted this earlier in my mod section, but it should be here. I ALWAYS do it warm. Contrary to some, IMPO, warm is better. The small items that pass through the filter do re-suspend in the oil and any gunk on the bottom unsticks together allowing it to flow out vs staying stuck to the pan when cold. It provides the most complete flush. Let each do what they are comfortable with.
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Check your owner's manuals if you own other bikes. The ones I've had do say to warm it up first.
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Well, I just went out and warmed it up. 143 miles worth to be exact lol. Draining now. C'mon all you lil' suspended dirt particles...get outta my engine!
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Oh, no,...Mr. Ferret,...would it not have been better to ride 150 miles to suspend all the little particulate "buggers"?...Shoot, you were only 7 miles short of the "optimal" warm-up...now,...let it drain for quite a few minutes to drip out those last few ounces up high in the engine! & be diligent in your torque values on drain bolt & filter!
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(12-22-2015, 06:27 AM)The ferret_imp Wrote: Well, I just went out and warmed it up. 143 miles worth to be exact lol. Draining now. C'mon all you lil' suspended dirt particles...get outta my engine!
I wonder if a bottle of one of those gut cleansing powders that are available in "health food" shops, if added prior to oil change, would help. Certainly a semiannual sump cleansing routine should be instituted to save the engine from those "dirty" contaminants.
Cheers
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I think this has been mentioned before, but again, what's the difference between the amount of oil required during a normal oil change with filter, and a first-time fill up on a new engine? Well over a quart I assume?
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(12-22-2015, 07:40 AM)Pterodactyl_imp Wrote: (12-22-2015, 06:27 AM)The ferret_imp Wrote: Well, I just went out and warmed it up. 143 miles worth to be exact lol. Draining now. C'mon all you lil' suspended dirt particles...get outta my engine!
I wonder if a bottle of one of those gut cleansing powders that are available in "health food" shops, if added prior to oil change, would help. Certainly a semiannual sump cleansing routine should be instituted to save the engine from those "dirty" contaminants. 
Cheers
I wonder if a bottle of one of those gut cleansing powders that are available in "health food" shops, if added prior to oil change, would help. Certainly a semiannual sump cleansing routine should be instituted to save the engine from those "dirty" contaminants.
Cheers
I reckon a good flush out with a mixture of dishwashing detergent and degreaser does the engine the world of good. Particularly when you use DACTYL Omnigrade.