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Dirty oil ? #4671029
02/19/18 04:36 PM
02/19/18 04:36 PM
Joined: Feb 2008
Posts: 1,058
MA.
Camprunner Offline OP
Camprunner  Offline OP
Joined: Feb 2008
Posts: 1,058
MA.
If your car/truck sits for several weeks without being driven and you have say 5,000 miles on your oil will dirt in the oil separate and stick to the oil pan? I'm running QSUD

Re: Dirty oil ? [Re: Camprunner] #4671044
02/19/18 04:48 PM
02/19/18 04:48 PM
Joined: Jul 2014
Posts: 119
North TEXAS
oldoak2000 Offline
oldoak2000  Offline
Joined: Jul 2014
Posts: 119
North TEXAS
no

Re: Dirty oil ? [Re: Camprunner] #4671091
02/19/18 05:17 PM
02/19/18 05:17 PM
Joined: Nov 2006
Posts: 19,916
MA, Mittelfranken.de
Trav Offline
Trav  Offline
Joined: Nov 2006
Posts: 19,916
MA, Mittelfranken.de
Several weeks no but long term it sure will. Prove it to yourself, drain your oil into a 5qt jug and leave it sitting, eventually you will find the sludge is on the bottom.


ASE L1, Master. Deutsch Meisterbrief.
Re: Dirty oil ? [Re: Camprunner] #4671119
02/19/18 05:37 PM
02/19/18 05:37 PM
Joined: Aug 2008
Posts: 3,159
USA
Reddy45 Offline
Reddy45  Offline
Joined: Aug 2008
Posts: 3,159
USA
Why isn't the dirt in the filter?

Or are we talking about microscopic silt that wouldn't matter anyway?

Re: Dirty oil ? [Re: Camprunner] #4671126
02/19/18 05:43 PM
02/19/18 05:43 PM
Joined: Sep 2015
Posts: 5,858
Kalifornia Kollective
BrocLuno Offline
BrocLuno  Offline
Joined: Sep 2015
Posts: 5,858
Kalifornia Kollective
Oil pans come up to temp when the engines reach op temp and the oil is pretty violently stirred by crankshaft windage, turn over to the pick-up (near the bottom), etc. Even if it had settled out, it would be re-mixed in short order. What are you concerned about?


Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.
Re: Dirty oil ? [Re: Camprunner] #4671167
02/19/18 06:15 PM
02/19/18 06:15 PM
Joined: Sep 2014
Posts: 2,097
US-WA
Dyusik Offline
Dyusik  Offline
Joined: Sep 2014
Posts: 2,097
US-WA
Take a mason jar, dump some used oil into it. Set it aside for however long, weeks, months, years. Pick it up and tilt is slowly to see, then swirl, look again, heat to 200F, swirl and look at the jar.
But why experiment when speculation is so much more fun smile


95 Cherokee 190K DELO 10W30, XG8
07 IS250 100K Napa 10w30, FULL
04 YZF-R1 19K DELO 15w40, XG7317
99 HD XL1200S 20K VR1 20w50, NG1515
14 RX450h 33k PP MIX, NG7047
Re: Dirty oil ? [Re: oldoak2000] #4671311
02/19/18 08:29 PM
02/19/18 08:29 PM
Joined: Oct 2012
Posts: 4,614
Taiwan
Ducked Offline
Ducked  Offline
Joined: Oct 2012
Posts: 4,614
Taiwan
Originally Posted By: oldoak2000
no
Yes. You speak for your own oil. but of course that's the point. Better answer would be maybe, if were talking gross visible stuff, but something will always settle out. Arguing otherwise assumes completely efficient filtration
Good luck with that.

Last edited by Ducked; 02/19/18 08:34 PM.
Re: Dirty oil ? [Re: Camprunner] #4671441
02/19/18 11:27 PM
02/19/18 11:27 PM
Joined: Feb 2014
Posts: 2,288
Kansan,1911 45ACP fan
Marco620 Offline
Marco620  Offline
Joined: Feb 2014
Posts: 2,288
Kansan,1911 45ACP fan
They say air filters get dirtier by have a car sit. I would make a prefilter and if you are worrying that much change the filter, prefill your new filter and be done.


15' Civic 179k.0w20 Redline/Archoil9100,Eibach,Yokohama/Borla Exhaust/Tein Suspension/Fu7317/Redline Si-1
Right to work state proud. Non union household
Re: Dirty oil ? [Re: Trav] #4671457
02/20/18 12:00 AM
02/20/18 12:00 AM
Joined: Jan 2018
Posts: 534
San Antonio, TX
das_peikko Offline
das_peikko  Offline
Joined: Jan 2018
Posts: 534
San Antonio, TX
Originally Posted By: Trav
Several weeks no but long term it sure will. Prove it to yourself, drain your oil into a 5qt jug and leave it sitting, eventually you will find the sludge is on the bottom.


I found that out today when I cleaned out my 5 gallon used oil storage bucket.

Re: Dirty oil ? [Re: Camprunner] #4671483
02/20/18 01:01 AM
02/20/18 01:01 AM
Joined: Dec 2016
Posts: 6,232
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 6,232
Waco, TX
Someone on here posted pics of clean, filtered well (using a good brand filter) used motor oil drained from the car and put into a clean jug.

After the oil settles for several weeks, there is a definite layer of S O M E T H I N G (dirt? sludge? or ????) on the bottom of the jug.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Dirty oil ? [Re: Marco620] #4671504
02/20/18 02:13 AM
02/20/18 02:13 AM
Joined: Oct 2012
Posts: 4,614
Taiwan
Ducked Offline
Ducked  Offline
Joined: Oct 2012
Posts: 4,614
Taiwan
Originally Posted By: Marco620
They say air filters get dirtier by have a car sit. I would make a prefilter and if you are worrying that much change the filter, prefill your new filter and be done.


They say many things. A lot of the many things they say are utter bollocks, irrelevant or generally muddled.

The above seems to include elements of all three in a compact and bijou format.I paticularly liked the apparent reference to prefilling a new airfilter.

Another maintenance task I've neglected. The SHAME.


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