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View Poll Results: Please report your oil consuption here for the vehicle you own(ed)
2011-14 Forester - Excessive Consumption 11 12.36%
2011-14 Forester - Normal/No Consumption 8 8.99%
2013 Legacy - Excessive Consumption 2 2.25%
2013 Legacy - Normal/No Consumption 3 3.37%
2012-13 Outback - Excessive Consumption 4 4.49%
2012-13 Outback - Normal/No Consumption 5 5.62%
2012-13 Impreza - Excessive Consumption 33 37.08%
2012-13 Impreza - Normal/No Consumption 28 31.46%
Multiple Choice Poll. Voters: 89. You may not vote on this poll

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Old 08-14-2017, 08:53 PM   #326
424wrx
Scooby Guru
 
Member#: 171948
Join Date: Feb 2008
Chapter/Region: Tri-State
Location: new york
Vehicle:
08 wrx stg3 vf52
14 legacy, 11 fozzy

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Originally Posted by JordanOfGilead View Post
The dealer told me that they resolved the short block issue, but manuals drink some oil between changes, just not enough to be considered "excessive" by Subaru (about a quart every 4k). My excessive consumption may have been brought about by some recent abuse, I pulled a Saturn out of the mud a couple weeks ago. We will see how it turns out, but I don't expect to fail the consumption test.
how the hell does your dealer think that a manual transmission has remotely anything to do with motor oil consumption? did you laugh at them after that response?
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Old 08-14-2017, 09:22 PM   #327
JordanOfGilead
Scooby Newbie
 
Member#: 446722
Join Date: May 2016
Location: Dayton, OH
Vehicle:
2016 Impreza 2.0i
Dark Gray Metallic

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Originally Posted by 424wrx View Post
how the hell does your dealer think that a manual transmission has remotely anything to do with motor oil consumption? did you laugh at them after that response?
No, I didn't, because it makes sense. With a CVT, the revs stay low when you aren't on the throttle. In a manual they stay wherever they are when you let off. If you engine break or downshift at all, it creates negative pressure in the combustion chamber during the intake cycle and, in cases with thinner oil like 0w20, can pull oil vapor up into the combustion chamber. Over time, this burns more oil than a CVT that keeps revs as low as possible when you're not heavy on the throttle and almost never engine brakes. The CVT can still burn about 3/4 of a quart between changes and varies from engine to engine. Their explanation makes sense and is consistent with what I have read elsewhere about both Subaru and other manufacturers that use 0w20.
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