Going through oil fast

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Dec 11, 2022
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Hello everyone. I am very frustrated. I have always been a honda owner. I needed a cheap but reliable car for commute to work 75 miles a day. I bought a 2011 Subaru forester with 84,000mi. I paid 10,900. After about 3 months I heard a ticking in engine. Next day turned to louder clicking. I checked oil and I saw none on the dipstick!! I did full oil change with 0w-30 mobile 1. 40 days later ticking starts again. I check. Almost no oil again. There are no spots in driveway. No excessive leak that I see. I did find some oil near bottom of block just behind radiator. I did a tune up and put in new spark plugs. There was oil on all the threads of the spark plugs.
Also the exhaust is very loud up near front of the engine near the manifold. It has all new exhaust from CAT back.
It is not overheating at all. There is a lot of road noise especially on highway. It almost sounds like rpm is too high at high speed. The sound reminds me of when you put aggressive snow tires or studs on and then drive on interstate when there is no snow and dry pavement.

Any ideas/suggestions?
 
Check the ventilation system (PCV) (defective systems tend to drink oil).
Perform a compression and cylinder leak down test.
A good technician will also test the oil pressure. 0W-30 is a bit light and great at -30 Deg. C. 24/7.
5W-30 full synthetic may be a better option.
Road noise can be a wheel bearing or driveshaft.
Make sure the correct tires are installed and that the transmission is shifting into all gears.
High RPM can be attributed to the incorrect tire profile or gear ratio.
 

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