When to change low mileage conventional or synthetic oil, 6 or 12 months

I know the low mileage OCI has opinions all over the place but I don't get why this isn't more agreed upon. After engine oil has been put in an engine and run a few hundred miles does it start to break down faster than oil new in an open bottle? If it does begin to break down faster than unused oil does it break down to the extent to benefit from replacement at 6 or 12 months? I know oil has lasted in the ground for millions of years and in sealed bottles for several years just fine but that doesn't apply to oil that has seen a few hot/cold cycles and been introduced to the combustion environment. I guess I can do an oil analysis at 6 and 12 months myself to see how the additives have aged but I would think someone who reads this forum would have done that already.
To be safe, six months.
 
Wow 2 or 3 times in almost 11 years 😳!. I suspect it would start to really break down by then.
Not only 2 or 3 times in nearly 11 years but one of those changes was in the past 3 months and the crankcase was filled with Amoco Ultimate that dad had in the garage when he died. It's been a long time since I've seen Amoco Ultimate on store shelves and suspect the oil may have been as much as 30-35 years old. I remember buying Amoco Ultimate back in the mid-late '80's quite often when Western Auto would run sales and rebate on it. They would run it on sale for $5/12quarts with a $5 rebate so all I was out was about $ .30 for tax and the cost of a stamp to send the rebate so, final cost was probably about 6 or 7 cents a quart. I know I gave dad a few cases and that's probably the same oil I gave him all those years ago. Western Auto used to run the same deal on Exxon Superflo along about the same time. All I've ever used in the '97 Escort is Exxon Superflo I had in in my garage when I bought the Escort new so I just dedicated that oil specifically to that car and still have a few cases of it. When I bought my Versa I had several cases of Citgo Supergard that I bought at a Dollar General grand opening in the mid '00's for 2qts/$1 so I dedicated it to the Versa.
 
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Not only 2 or 3 times in nearly 11 years but one of those changes was in the past 3 months and the crankcase was filled with Amoco Ultimate that dad had in the garage when he died. It's been a long time since I've seen Amoco Ultimate on store shelves and suspect the oil may have been as much as 30-35 years old. I remember buying Amoco Ultimate back in the mid-late '80's quite often when Western Auto would run sales and rebate on it. They would run it on sale for $5/12quarts with a $5 rebate so all I was out was about $ .30 for tax and the cost of a stamp to send the rebate so, final cost was probably about 6 or 7 cents a quart. I know I gave dad a few cases and that's probably the same oil I gave him all those years ago. Western Auto used to run the same deal on Exxon Superflo along about the same time. All I've ever used in the '97 Escort is Exxon Superflo. I had in my garage when I bought the Escort new so I just dedicated that oil specifically to that car and still have a few cases of it.
Wow antique oil LOL. I would of kept it for my collection.
 
Wow antique oil LOL. I would of kept it for my collection.
This last oil change used all the Amoco so next time her car needs an oil change I'll probably just use some of my 20-25 year old stash. My oil changes are still costing me less than $5 each with all this older oil and filters that I've bought at store closeouts.
 
This last oil change used all the Amoco so next time her car needs an oil change I'll probably just use some of my 20-25 year old stash. My oil changes are still costing me less than $5 each with all this older oil and filters that I've bought at store closeouts.
Well it is a good way to save money. I get closeout oil too then I use it but if they change the package or something then I save it because I think it would be worth money later.
 
Well it is a good way to save money. I get closeout oil too then I use it but if they change the package or something then I save it because I think it would be worth money later.
I've got a few quarts of Castrol GTX 20w50 in the cardboard cans in my garage that I used in a motorcycle years ago. I know it was bought in the mid 1980's. I guess I should use it up in my daily driver and get it out of the way. I think there's about 6 quarts of Havoline 10w40 in the metal cans at mom's house that dad never used. I think it's in the same design can that I used in my '77 Buick Regal when new so it's probably close to 45 years old. There's some surface rust on the outside of the cans but I bet the oil is still OK.
 
LOL. If being born in 2002 is young to you then yes I’m young. 😁😄 I’ll be 19 in April LOL.
Yep, you're just out of diapers. My youngest son is 30. I'm 61. Just think a large portion of my oil stash is older than you are. My bottles of Exxon Superflo were bought at least 5 years before your time.
 
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LOL. If being born in 2002 is young to you then yes I’m young. 😁😄 I’ll be 19 in April LOL.
Dude they way some of the guys talk on here, I thought I was young here at 33 reading about oil.

Appreciate the time you have when you're young, before you know it you'll end up like me married with a 1.5 year old.

Had to edit I'm 33 now, you get so old you forget you just had a birthday 🤣
 
Wow 2 or 3 times in almost 11 years 😳!. I suspect it would start to really break down by then.
A friend of my has his grandfathers 1989 Lincoln Town car and he didn't change the oil in it for 10years. His reasoning was it uses so much oil so he kept it topped up. I finally convinced his to let me change it so I put havoline 10w40 conventional and motorcraft Filter. Oil was ***** black but still felt slick. Car only had 93k but for what ever reason it drinks two quarts every 1k. He said his grandpa complained that about it since it was new.
 
Dude they way some of the guys talk on here, I thought I was young here at 33 reading about oil.

Appreciate the time you have when you're young, before you know it you'll end up like me married with a 1.5 year old.

Had to edit I'm 33 now, you get so old you forget you just had a birthday 🤣
32 here. I tend to assume most of the people here are older but its not the case.
 
A friend of my has his grandfathers 1989 Lincoln Town car and he didn't change the oil in it for 10years. His reasoning was it uses so much oil so he kept it topped up. I finally convinced his to let me change it so I put havoline 10w40 conventional and motorcraft Filter. Oil was ***** black but still felt slick. Car only had 93k but for what ever reason it drinks two quarts every 1k. He said his grandpa complained that about it since it was new.
He was definitely brave. He sounds almost like my brother in law who doesn’t believe in changing oil or filter after 200,000 miles just top if off if it uses any. It’s a wonder his car is still going.
 
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