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8K too long OCI ? #4441778
06/26/17 07:55 AM
06/26/17 07:55 AM
Joined: Nov 2014
Posts: 545
Denver
marine65 Offline OP
marine65  Offline OP
Joined: Nov 2014
Posts: 545
Denver
In another thread I posted that I use synthetic oil for 8K miles in my 06 Sentra.
It has a 3 quart capacity.
Someone posted that this is too many miles for only 3 quarts.
I never thought of that.
Opinions?


2006 Nissan Sentra 195K miles
2010 Hyundai Elantra 85K miles
Re: 8K too long OCI ? [Re: marine65] #4441789
06/26/17 08:15 AM
06/26/17 08:15 AM
Joined: Oct 2013
Posts: 1,462
Georgia
DeepFriar Offline
DeepFriar  Offline
Joined: Oct 2013
Posts: 1,462
Georgia
Another tiny sump Sentra here and, personal preference, 8K is about the limit in my mind. Bearing in mind that there is no right answer - too many variables as usual. Stick with syn though with such a small sump.

Re: 8K too long OCI ? [Re: marine65] #4441792
06/26/17 08:17 AM
06/26/17 08:17 AM
Joined: Jul 2005
Posts: 30,982
NY
demarpaint Offline
demarpaint  Offline
Joined: Jul 2005
Posts: 30,982
NY
You'll get a lot of opinions, get a UOA and you'll have facts. It could be damaging your engine, or you could be just fine. I often read blanket statements here like a good dino oil can go 5K miles and a good synthetic 10K miles, or something along those lines. I know for a fact that in my case that is not true and have UOA data to back it up. Bottom line get a UOA to be sure.

Opinion: if you sit in traffic and have a 3 qt sump 8K miles is too long.


God Bless Our Troops

Re: 8K too long OCI ? [Re: marine65] #4441804
06/26/17 08:38 AM
06/26/17 08:38 AM
Joined: Oct 2015
Posts: 476
MN
WillsYoda Offline
WillsYoda  Offline
Joined: Oct 2015
Posts: 476
MN
If the miles are Highway, it is ok. If you are in traffic doing short trips, I might go shorter. A UOA will tell you more.

Re: 8K too long OCI ? [Re: demarpaint] #4441808
06/26/17 08:43 AM
06/26/17 08:43 AM
Joined: Mar 2015
Posts: 5,422
Virginia
bbhero Online content
bbhero  Online Content
Joined: Mar 2015
Posts: 5,422
Virginia
+1 to what demarpaint said.


Nissan Altima 3.5 Coupe
Mobil Super 5w30 Wix 57356
"Treat your family like your friends and treat your friends like your family."
Re: 8K too long OCI ? [Re: marine65] #4441830
06/26/17 09:21 AM
06/26/17 09:21 AM
Joined: Mar 2004
Posts: 21,121
Upstate NY
Donald Offline
Donald  Offline
Joined: Mar 2004
Posts: 21,121
Upstate NY
UOA


2015 Subaru Forester 2.5 engine/CVT
2015 Ford F250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)
Re: 8K too long OCI ? [Re: marine65] #4441853
06/26/17 09:45 AM
06/26/17 09:45 AM
Joined: Jan 2016
Posts: 849
NC
Vladiator Offline
Vladiator  Offline
Joined: Jan 2016
Posts: 849
NC
As stated above, and as I mentioned it in another thread, 8k might be pushing it. Think of it this way... If we control one single drop of oil in the sump through it's life cycle - we will see that the drop will pass through the filter and oil passages and all of the engine 1 million times (random number) in a 6 quart 4 cylinder engine. Well in a 4 cylinder engine with a 3 quart sump the same drop will see the engine surfaces twice as much. I believe that at such point the oil additive package could be in a shape that does not provide ultimate protection anymore, and all it will take is a small increase in oil stress (WOT or long idling time, etc) to reach it's limits and cause irreversible damage to the engine. Spun bearing, camshaft/crankshaft surfaces, cylinder walls, etc. I'd rather be safe than sorry.

Re: 8K too long OCI ? [Re: marine65] #4441911
06/26/17 10:57 AM
06/26/17 10:57 AM
Joined: Sep 2014
Posts: 1,490
Toronto Canada
WobblyElvis Offline
WobblyElvis  Offline
Joined: Sep 2014
Posts: 1,490
Toronto Canada
Opinion: you don't really know without performing an oil analysis.

Experience: I've run conventional oil 8,000 miles of mixed driving and an oil analysis has said it was still good.

Re: 8K too long OCI ? [Re: marine65] #4441931
06/26/17 11:21 AM
06/26/17 11:21 AM
Joined: Jun 2014
Posts: 2,737
Phoenix, Arizona - USA
SirTanon Offline
SirTanon  Offline
Joined: Jun 2014
Posts: 2,737
Phoenix, Arizona - USA
All good suggestions made so far. With only a 3-quart sump, I'd be nervous about going 8,000 miles unless it was all highway miles.

Having said that, as others have stated, getting a Used Oil Analysis done will definitely help determine if 8k is too much for your oil. If it were me, I'd do a pull @ 6k miles, and see how it is.. and go from there.

I would also like to add that you should also make sure your air filter is in good shape. If it's got a hole, or is not filtering well enough, or is not in there right (and thus letting stuff by), your oil is definitely not going to look good.


2010 Ford Fusion SE - 2.5 liter/6F35 Trans - 266,000mi
2014 Nissan Altima SL - 2.5 liter/CVT - 60,000mi
Re: 8K too long OCI ? [Re: marine65] #4441970
06/26/17 12:29 PM
06/26/17 12:29 PM
Joined: Dec 2016
Posts: 279
Sav ga
NStuart Offline
NStuart  Offline
Joined: Dec 2016
Posts: 279
Sav ga
Even 5000 miles on synthetic in my pickup truck can get a little out of line


Detroit14l 1m75k mi bp schaffer9k 30k oil
96 ram 5.9 gas 80k built tranny 5k m1
85 cj7 4.2 performance build. Schaeffer 9000
08 cbr600rr graffiti. T6
08 husky sm610 t6
Re: 8K too long OCI ? [Re: marine65] #4441973
06/26/17 12:32 PM
06/26/17 12:32 PM
Joined: Dec 2016
Posts: 7,162
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 7,162
Waco, TX
I'm curious to know what peculiarities your engine has.

I've seen Mobil 1 go 30,000 miles in a 5 quart pan Chevy 350.
Of course, that's a low-power-density application (about 1/2hp per cu/in)


"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: 8K too long OCI ? [Re: marine65] #4442064
06/26/17 02:27 PM
06/26/17 02:27 PM
Joined: Nov 2014
Posts: 545
Denver
marine65 Offline OP
marine65  Offline OP
Joined: Nov 2014
Posts: 545
Denver
I've been running 8K or so OCI with full synthetic for the 81K out of 178K miles that I've owned the car.
I never have to add oil.
This next oil change will be the first oil analysis I've done.
My driving is 80 % high way but there is a lot of stop and go during rush hour.


2006 Nissan Sentra 195K miles
2010 Hyundai Elantra 85K miles
Re: 8K too long OCI ? [Re: marine65] #4442512
06/27/17 05:03 AM
06/27/17 05:03 AM
Joined: Jul 2015
Posts: 4,655
Down Under
SR5 Online content
SR5  Online Content
Joined: Jul 2015
Posts: 4,655
Down Under
What does the owners manual say ?


---------------------------------------------------------------------------------
Castrol GTX Ultraclean 15W40 A3/B3 + Wesfil-Cooper Z154
Re: 8K too long OCI ? [Re: marine65] #4443016
06/27/17 04:45 PM
06/27/17 04:45 PM
Joined: Sep 2015
Posts: 6,075
Kalifornia Kollective
BrocLuno Offline
BrocLuno  Offline
Joined: Sep 2015
Posts: 6,075
Kalifornia Kollective
Does it use a spin-on filter? If so, you might see if you can find a bigger one that will fit and bring up your total sump capacity a bit.

I'd prolly limit it to 6,000 miles for my peace of mind ... smile


Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.

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