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#4544126 - 10/15/17 02:18 PM Engine oil use
Joeescape63 Offline


Registered: 05/08/17
Posts: 16
Loc: New York/USA
Do certain engine designs use more oil over others?I have a Ford Ecoboost 2.0L which is a inline-4. Would a Subaru boxer(flat 4) use more oil than a inline or a V shaped engine?I always break the engine in as per manufactures recommendation.Thanks Joe
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#4544143 - 10/15/17 02:53 PM Re: Engine oil use [Re: Joeescape63]
bdcardinal Online   content


Registered: 06/03/05
Posts: 10997
Loc: Santa Barbara, CA
I think there are other factors that influence oil use. PCV design, type of piston rings and gap, and cylinder wall finish have more of an impact.
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#4544145 - 10/15/17 03:02 PM Re: Engine oil use [Re: Joeescape63]
Eddie Offline


Registered: 12/07/03
Posts: 9570
Loc: Florida, Cape Coral
I agree with bdcardinal. There are just too many factors to make a general statement. I've had flat 4s & 6s and inline 4s and l6 and v6s and non of them used more than a few ozs in a normal OCI. Ed
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#4544215 - 10/15/17 04:32 PM Re: Engine oil use [Re: Joeescape63]
OneEyeJack Offline


Registered: 09/14/10
Posts: 7479
Loc: S California
Boxer 4's and 6's have been doing well in airplanes for a long time where maintenance is well tracked and most often done with great care, no shortcuts, no quicky lubes.

I had to overhaul an 84 Civic motor at 400K miles when the 4 oil control rings all failed and everything else in the engine was doing just fine. Most people don't go that far and would never see such a failure.

Crankcase ventilation control is a contributor to the problem in engines that would otherwise never see such difficulty.

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#4544222 - 10/15/17 04:43 PM Re: Engine oil use [Re: Joeescape63]
Alex_V Offline


Registered: 04/10/16
Posts: 1155
Loc: Campbellsville, KY
Piston orientation or basic design doesn't have much effect on oil consumption. Certain materials or designs used by certain manufacturers (Toyota's ring coking, Dodge's low-tension rings, Chevy's faulty integral PCV valve on the Cruze, etc.) do, but not strictly how many cylinders lay which direction.
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#4544428 - 10/15/17 08:54 PM Re: Engine oil use [Re: Alex_V]
pkunk Offline


Registered: 03/19/11
Posts: 257
Loc: NM, USA
Originally Posted By: Alex_V
Piston orientation or basic design doesn't have much effect on oil consumption. Certain materials or designs used by certain manufacturers (Toyota's ring coking, Dodge's low-tension rings, Chevy's faulty integral PCV valve on the Cruze, etc.) do, but not strictly how many cylinders lay which direction.

Until you think about oil use in an aircraft radial engine
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#4544964 - 10/16/17 10:16 AM Re: Engine oil use [Re: OneEyeJack]
andyd Offline


Registered: 09/25/04
Posts: 7158
Loc: Marshfield , MA
Originally Posted By: OneEyeJack
Boxer 4's and 6's have been doing well in airplanes for a long time where maintenance is well tracked and most often done with great care, no shortcuts, no quicky lubes.

I had to overhaul an 84 Civic motor at 400K miles when the 4 oil control rings all failed and everything else in the engine was doing just fine. Most people don't go that far and would never see such a failure.

Crankcase ventilation control is a contributor to the problem in engines that would otherwise never see such difficulty.
Did you replace just the oil rings and put it back together? I would have been tempted.
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