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  #11  
Old 10-07-2013, 08:25 PM
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I would go with the change it montra as well. It doesn't just come down to hours, it also comes down to time sitting in the engine as well. I am assuming you changed it before you winterized last year. That means it sat the entire winter, then the entire summer. Thats almost 11mos most likely if not 12 on the same oil. Its a no brainer to me. It's due.
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  #12  
Old 10-07-2013, 08:39 PM
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Oil is cheap - I would change it too based on time sitting in the engine and the fact it has been used (even if only 6 hours).
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  #13  
Old 10-08-2013, 09:02 AM
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This will probably come as a surprise to no one, but I'd change it. I probably put less than 20 hrs on my boat this season and will be changing it before I put her to bed for winter.
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  #14  
Old 10-08-2013, 09:21 AM
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I put less than 10 hours on mine this year and didn't change it, but will in the spring.
I was up against a deadline to get my boat into winter storage and didn't realize until it was too late that I didn't have the oil and filter. So I just did the anti freeze thing this year.


For the first 22 years I owned my boat, I changed the oil in the spring. Once I started hanging around here I realized it should be in the fall and changed my ways.

The boat is 31 years old now and the 20 plus years of sitting the winter with "old" oil in it didn't seem to cause any issues.
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  #15  
Old 10-08-2013, 10:31 AM
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You will be fine, it did not run long enough to significantly build up contaminates.
The old 3k/3mo rule is out the window for anyone with their head not stuck in an oil can that needs a church key to open.

IF it were me and doing an oil change myself, I would probably do it for the $20 in oil.
Probably be lazy and not change filter as that other .5 qt will not be significant and the filter did not have anywhere close to enough hours on it.
If I was paying dealer price for it, I would probably skip or if I had wasted $$ on synthetic I would not.
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  #16  
Old 10-08-2013, 10:34 AM
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Quote:
Originally Posted by bsloop View Post
You will be fine, it did not run long enough to significantly build up contaminates.
The old 3k/3mo rule is out the window for anyone with their head not stuck in an oil can that needs a church key to open.

IF it were me and doing an oil change myself, I would probably do it for the $20 in oil.
Probably be lazy and not change filter as that other .5 qt will not be significant and the filter did not have anywhere close to enough hours on it.
If I was paying dealer price for it, I would probably skip or if I had wasted $$ on synthetic I would not.
You tryin' to spark an oil discussion?
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  #17  
Old 10-08-2013, 10:35 AM
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Quote:
Originally Posted by mikeg205 View Post
You tryin' to spark an oil discussion?
Trying to spark something.
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  #18  
Old 10-08-2013, 10:56 AM
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Wow, everyone is all over the spectrum here. Oil is bs, synth is the same, head in an oil can, ocd do it, maybe if you're going to sell it.

Here I will lay it down for you.

Oil starts to break down after about 25 hours. (1500 miles or half life( 1500 miles/60mph=25 hours)) this is how you get your 50 hour interval recommendation. And needs replaced at 3000 miles or 50 hours.

Now, we know engine oil does age. The age effects conductivity (newer less conductive, older more conductive) This directly correlates with thermal protective efficiency. Dino oil after 3 months is not safe to run in your engine. After 1.5 months it is already starting to break down.

You may get more time out of SHC oil vs Hydrocracked oils but they all break down.

I would recommend people just replace their oil anytime they feel it is dirty.

My work vans are on a 2000 mile interval. My personal truck is on a 3000 mile interval and my boat is on a 30 hour interval. I use synthetic SHC oils only.
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  #19  
Old 10-08-2013, 11:13 AM
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So... I am assuming everyone wants to change their oil with winterizing because of the contaminates in the oil from use during summer? If the oil sits all winter does it still break down? I changed the oil mid summer because my Uncle couldn't remember if he had changed it at the end of the season last year, probably put 25 or so hours on it since the change.. And I wasn't planning on changing it until the start of next seasons..
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  #20  
Old 10-08-2013, 11:16 AM
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Interesting thread and I was thinking about asking the same question. I have always run syn Mobil1 in my LT-1...less than 20 hours run this year.
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