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#4525865 - 09/25/17 02:45 PM Extending OCI in Oil Burner
Emanuel Offline


Registered: 07/01/17
Posts: 183
Loc: Venezuela, South America
My 284k miles Corolla is burning 0.8 quarts every 1k miles. I usually do 3k OCI on conventional oil so I add 2 quarts of oil between oil changes and in the last 300 miles I let the oil level drop to the middle, which is the lowest that Iīm confortable with.

If I adding that quantity of oil between oil changes could I safely extend the OCI? The make up oil should replenish the additives, but Iīm concerned that there could be fuel dilution caused by the blowby the engine must have.

An oil analysis isnīt possible for me, down here in Venezuela it costs 40$ and a oil change cost less than 10$ so I would rather do frequent oil changes that doing a oil analysis.

I donīt consider my car a pretty bad oil burner, I think that 0.8 qt (and sometimes 0.65 qt) every 1k miles is pretty decent for its age and mileage. Iīm currently using a 15w40 HDEO with CI4/SL rating.

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#4525872 - 09/25/17 02:49 PM Re: Extending OCI in Oil Burner [Re: Emanuel]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
Yes, you are correct.

You can change the oil at 15,000 (or more) miles,
no harm will come to your engine since you are often adding fresh oil.
_________________________
"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."

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#4525876 - 09/25/17 02:52 PM Re: Extending OCI in Oil Burner [Re: Emanuel]
LeakySeals Offline


Registered: 02/18/11
Posts: 6561
Loc: Hudson, NH
What year? I know the 98-02 has a problem with the oil control return holes.
_________________________
06 Escalade 6.0L AWD 160k. M1 5w30 Fram TG
03 Maxima 3.5L 149k ST HM 10w30

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#4525879 - 09/25/17 02:53 PM Re: Extending OCI in Oil Burner [Re: Emanuel]
TheKracken Offline


Registered: 04/18/17
Posts: 515
Loc: Fort Worth TX
I would have no problem extending the OCI, I did this on my last prius that burned about as much oil as your car and I would just change the filter every 5k miles and do a full change at the 10k mark (though you could probably go longer!)
_________________________
2011 Prius 96k miles RLI 5w20
97 Toy T100 4x4: amsoil 0w20 242k Miles
04 Toy Sienna awd: Pennzoil 0w20 281k Miles

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#4525887 - 09/25/17 03:02 PM Re: Extending OCI in Oil Burner [Re: Emanuel]
slug_bug Offline


Registered: 01/08/13
Posts: 235
Loc: Michigan
I decided to stretch the OCI on my oil burning Chrysler mini-van the last time. It burns about the same amount of oil as yours. I put a Fram Ultra on it and ran it 20,000 miles while adding a quart whenever it reached the low mark. I started with synthetic and added whatever leftover synthetic I had on hand from the $2.00 per quart stash. The car ran great and the oil actually looked pretty good when I drained it at 20k. This is going to be my plan going forward on the Dodge Grand Caravan.
_________________________
2016 Miata 2.0l (12k)
2013 Fusion 2.5l(78k)
2013 Focus(56K)
2010 Linc MKX 3.5l(88k)
2007 Dodge Caravan 3.8l(177k)
2003 Merc. Mountaineer 4.6l(114k)

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#4525891 - 09/25/17 03:06 PM Re: Extending OCI in Oil Burner [Re: Emanuel]
Kuato Offline


Registered: 10/23/05
Posts: 7094
Loc: Colorado
Originally Posted By: Emanuel
My 284k miles Corolla is burning 0.8 quarts every 1k miles. I usually do 3k OCI on conventional oil so I add 2 quarts of oil between oil changes and in the last 300 miles I let the oil level drop to the middle, which is the lowest that Iīm comfortable with.

If I adding that quantity of oil between oil changes could I safely extend the OCI? The make up oil should replenish the additives, but Iīm concerned that there could be fuel dilution caused by the blowby the engine must have.

An oil analysis isnīt possible for me, down here in Venezuela it costs 40$ and a oil change cost less than 10$ so I would rather do frequent oil changes that doing a oil analysis.

I donīt consider my car a pretty bad oil burner, I think that 0.8 qt (and sometimes 0.65 qt) every 1k miles is pretty decent for its age and mileage. Iīm currently using a 15w40 HDEO with CI4/SL rating.


As mentioned above, use a very good filter and perform a normal oil change every 15000 miles. There are several oil burners on here doing the same thing, and I have seen an analysis that looked good at that distance.
_________________________
Thick vs Thin test: 15k / 43k miles complete

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#4525909 - 09/25/17 03:24 PM Re: Extending OCI in Oil Burner [Re: Emanuel]
KL31 Offline


Registered: 06/03/16
Posts: 549
Loc: South OZ
In 3k miles you'd have added at least 2 quarts. That's probably half the sump capacity? I'd do as the others have said and go many more miles considering how much fresh oil is going in.
_________________________
95 MX-3 2.5L|Shell Helix Ultra 5W40|Wix 51356
04 Focus 1.8L|Wesfil Cooper WZ63|Valvoline MST 5W30
05 Kluger 3.3L|Wesfil Cooper WZ418|Magnatec 10W30 Semi Syn

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#4525926 - 09/25/17 03:42 PM Re: Extending OCI in Oil Burner [Re: Emanuel]
TinyVoices Offline


Registered: 09/12/16
Posts: 480
Loc: Vienna, VA
I'd change to a cheaper high mileage oil like MaxLife red bottle. Should slow the burning and is still cheap. Don't know what's a valuable to you down there, but I'm sure there is some high mileage oil available to you.


Edited by TinyVoices (09/25/17 03:44 PM)
_________________________
1993 Toyota MR2 Hardtop N/A - 157k miles - Valvoline Max Life 5w30
2006 Toyota Matrix XR AWD (Fiancee) - 126k miles - Valvoline Max Life 5w30

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#4525942 - 09/25/17 03:54 PM Re: Extending OCI in Oil Burner [Re: Emanuel]
WobblyElvis Offline


Registered: 09/23/14
Posts: 1341
Loc: Toronto Canada
My car is using a quart every 4,000 miles and I have run the oil [with top ups] out to 12,000 miles. The problem is the filter comes out black and I find carbon/soot at the ends of the pleats in the oil filter. I am guessing that blow by is dumping soot into the oil at a high rate. UOA tells me everything is fine but I don't like the situation. 3,000 miles seems like a short OCI, I would go at least 5,000 miles but not to far.

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#4526007 - 09/25/17 05:17 PM Re: Extending OCI in Oil Burner [Re: Emanuel]
ecotourist Offline


Registered: 07/09/08
Posts: 1067
Loc: British Columbia, Canada
I don't think it's a bad oil burner either. Burning 0.8 quartz in 1000 miles in a car with that many miles is quite reasonable. Some new car manufacturers would claim it was normal on a new car today - though I think that's a bit of a stretch. It would have been quite normal in any engine 40 or 50 years ago.

Topping up regularly and changing a quality oil every 5,000 miles would be just fine. Only thing I'd change is to a more modern oil, something with an SN rating. Though a 10W-40 would make for easier starting. I would stick with a dino (non synthetic) oil too; no point in going through expensive oil (6 or 7 quartz over 5,000 miles) when you don't need it.
_________________________
2000 BMW 528i 5MT
2007 Honda Accord EX-L 4Door V6 6MT

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#4526020 - 09/25/17 05:26 PM Re: Extending OCI in Oil Burner [Re: Emanuel]
A_Harman Offline


Registered: 10/01/10
Posts: 6915
Loc: Michigan
I agree with ecotourist that 0.8 quarts in 1000 miles is not bad consumption. Running a 15w40 HDEO, you should easily be able to exceed 6000 mile change intervals with no problem, probably even stretch it to 10k miles.

How much sulfur is in the fuel in Venezuela? That might effect the OCI.
_________________________
1985 Z51 Corvette track car
2002 Camaro Z28 LS1/6-speed
2001 Dodge Ram 2500 diesel
1972 GMC 1500 shortbed project truck

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#4526023 - 09/25/17 05:27 PM Re: Extending OCI in Oil Burner [Re: Emanuel]
HerrStig Offline


Registered: 08/24/11
Posts: 9560
Loc: Boston, MA
It may be the oil pump gasket leaking and not burning. Oil pump leaks generally happen when the engine is running.

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#4527015 - 09/26/17 07:02 PM Re: Extending OCI in Oil Burner [Re: LeakySeals]
Emanuel Offline


Registered: 07/01/17
Posts: 183
Loc: Venezuela, South America
Itīs a 01 but with a 98 engine (the 7AFE)

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#4527018 - 09/26/17 07:06 PM Re: Extending OCI in Oil Burner [Re: KL31]
Emanuel Offline


Registered: 07/01/17
Posts: 183
Loc: Venezuela, South America
Thatīs true, the sump holds 3.8 qts, and if I want to keep to oil level in the full mark I have to add 2.5 qts every 3k miles.

Right now Iīm in the first 1k miles of my last oil change and I have noticed lower oil consumption with this 15w40 HDEO than with Conventional 20w50, I hope this consumption rate doesnīt increases as the OCI gets longer (it shouldnīt).

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#4527022 - 09/26/17 07:11 PM Re: Extending OCI in Oil Burner [Re: TinyVoices]
Emanuel Offline


Registered: 07/01/17
Posts: 183
Loc: Venezuela, South America
Venezuelans donīt know anything of Oil Science so the only available High Mileage Oil is a 20w50. I used to use that oil but now Iīm testing a HDEO 15w40 and I think the oil consumption is now lower (that has been the case in the last 1k miles).

I also gonna try adding TCW3 Outboard Oil in the gas tank to see if that helps the oil rings to seal better and it can help lowering the oil consumption.

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