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Recommended engine oil for AC G153 engine

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SteveFulgoni View Drop Down
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Joined: 13 Aug 2010
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    Posted: 17 Aug 2010 at 10:41am
Hello,
Does anyone know the recommended engine oil for an AC G153 4 cyl engine powered by propane gas?  Thanks
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Jeff Z. NY View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Jeff  Z.  NY Quote  Post ReplyReply Direct Link To This Post Posted: 17 Aug 2010 at 12:15pm
I would think a 10w-30 would be fine it it sees summer/winter temps.
If it is kept inside and warm all year a 30w detergent should be fine.
I bet Allis said:
10w below 0
20w below 32 and above 0
30w above 32.
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firebrick43 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote firebrick43 Quote  Post ReplyReply Direct Link To This Post Posted: 17 Aug 2010 at 12:26pm
Any good SM rated oil in 10w-30 5w-30, or even 0w-30 should work very well, especially in cold weather.  (There is no such thing as a winter rating, ie at 32 degrees{10w/5w/0W} that is too thin, even 0w-30 oil is to thick at freezing temps but is the best we got)  At 210F/100C all 30 weight oils have the same protection.  The ratings/recommended oils from that time period when your engine was built are nothing like what is around today and are not comparable.  Multi grades were non existent at the time.      The sage advice is 10 psi of pressure when at full operating temp for every 1000 rpms.  The engine is probably governed somewhere around 2000 rpm.  You should use the thinest oil that will maintain 20-25 psi at operating temp.  Thicker 40w or 45w oil is NOT better if you can maintain oil pressure with a lower viscosity oil.  Thicker oil only helps in larger clearances do to wear. 
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SteveFulgoni View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SteveFulgoni Quote  Post ReplyReply Direct Link To This Post Posted: 17 Aug 2010 at 2:06pm
Thank you
 
I am seeing a lot of references to 15W-40 oil for diesel engines.  It sounds like that would be too thick?
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Gary in da UP View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Gary in da UP Quote  Post ReplyReply Direct Link To This Post Posted: 17 Aug 2010 at 5:24pm
15W40 is fine at 90 and above.  Diesel oil can also be had in 10W30 , I use Mobil Delvac 10/30 in my powerstroke and Kubota 4150 year round. they start much easier in the winter and in my climate we don't see much above 85 ever. Even 10/30 gets thick at 20 below which is not uncommon here in winter.
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SteveFulgoni View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SteveFulgoni Quote  Post ReplyReply Direct Link To This Post Posted: 17 Aug 2010 at 8:58pm
Thanks, it sounds like 10W-30 is the way to go
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