M1 5w20 shelf life after opening

Messages
25
Location
IL
I have 2 quarts left of a 5 quart M1 5W20 jug that I opened about 3 years ago sitting in the garage. Is it still OK to use or mix with new M1 5W20?
 
Messages
452
Location
Midwest
I thought I'd always heard to keep your oil inside the house out of the cold if you live in the north where temp changes a lot throughout the year. Hot then cold and back and forth can shorten the life of oil. Anyone else heard that? Anyhow, I keep everything in the basement where it's a minimum of 65 degrees.
 
Messages
7,930
Location
Hudson, NH
I never thought about shaking oil, but this post raises questions about oil storage. Maybe some experts can answer. Is it ok to shake and pour right in, or do we need to wait after shaking? Thought aerated oil was bad, what happens on an overfill. Gets foamy, no lubrication. Should we always shake the oil? How long was it on the store shelf? Don't know. If we have extra oil from an OCI, it may sit around for a couple months. Shake before using it to top off?
 
Messages
2,543
Location
Rochester, MI, US, World
Originally Posted By: LeakySeals
Is it ok to shake and pour right in, or do we need to wait after shaking? Thought aerated oil was bad, what happens on an overfill. Gets foamy, no lubrication. Should we always shake the oil? How long was it on the store shelf? Don't know. If we have extra oil from an OCI, it may sit around for a couple months. Shake before using it to top off?
I'm curious about this too. I always shake, then pour in immediately. My guess is that while pouring in, the oil moves over enough rough edges in the valvetrain (in my case) on its way down to the sump to break up most of the entrained air. Plus, after I finish filling, I always empty my old oil into the container, put my tools away, then go wash up before I start the car back up. I'm sure this also gives the oil time to let some of the entrained air to escape.
 
Messages
3,496
Location
VA
A 30 second shake isn't going to cause enough aeration to worry about, most of the bubbles will be gone by the time the oil reaches the pan...
 
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