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Re: Engine lubrication [message #357679 is a reply to message #355936] |
Wed, 12 August 2020 21:47 ![Go to previous message Go to previous message](/GMCforum/theme/default/images/up.png) ![Go to next message Go to previous message](/GMCforum/theme/default/images/down.png) |
Carl S.
![United States United States](/GMCforum/images/flags/us.png) Messages: 4186 Registered: January 2009 Location: Tucson, AZ.
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The machine shop in Tucson that did the work on my 455 (Larry's engine and Marine) said that, due to the large size of the main journals on the 455 crankshaft, they set the clearances for 20W50 oil. I'm not totally clear on the reason why, but it has to do with getting enough oil in those large diameter bearings. I broke it in with 15W40 Rotella, but imediately switched to Valvoline 20W50. I would be comfortable going back to the 15W40, but think maybe the 20W50 is a better choice for me in Southern AZ, where I am often driving the coach in 100 plus degree temps, at least during the Summer.
Carl Stouffer
'75 ex Palm Beach
Tucson, AZ.
Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles, Solar battery charging. GMCSJ and GMCMI member
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Engine lubrication
By: tgeiger on Sat, 13 June 2020 05:35
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Re: Engine lubrication
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Re: [GMCnet] Engine lubrication
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Re: [GMCnet] Engine lubrication
By: jimk on Sat, 13 June 2020 19:51
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Re: Engine lubrication
By: tgeiger on Sat, 13 June 2020 07:55
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Re: [GMCnet] Engine lubrication
By: jimk on Sat, 13 June 2020 09:39
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Re: [GMCnet] Engine lubrication
By: jimk on Sat, 13 June 2020 12:57
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Re: Engine lubrication
By: rickmike on Tue, 11 August 2020 20:50
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Re: Engine lubrication
By: tgeiger on Sat, 13 June 2020 18:04
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Re: Engine lubrication
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Re: Engine lubrication
By: Larry on Sat, 13 June 2020 19:14
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Re: [GMCnet] Engine lubrication
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Re: Engine lubrication
By: Carl S. on Wed, 12 August 2020 21:47
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Re: Engine lubrication
By: rickmike on Thu, 13 August 2020 23:45
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Re: [GMCnet] Engine lubrication
By: jimk on Sat, 20 June 2020 12:05
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Re: Engine lubrication
By: roy1 on Fri, 04 December 2020 11:29
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Re: Engine lubrication
By: mghamms on Fri, 04 December 2020 11:39
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Re: Engine lubrication
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