Oil consumption & compression checks

xman

Registered User
Like almost every other post here, I have an oil consumption problem. I switched over to 20W-50 and noticed an immediate effect. I went from a quart usage for 300 miles to around 800 miles. I had a compression test done yesterday and every cylinder was at 120 psi except #4 which was at 100 psi. He added a little oil and it went up to 120 psi.

My question is: Is this good or bad? Am I losing that much oil out of #4 cylinder? I had the plugs changed because #4 was fouled out. The mechanic said there was oil residue on it. The car runs great now but are my only choices to keep adding oil or to have a ring job?
 
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