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Message: Re: Actually.............. . .

Changed By: JFP in PA
Change Date: January 04, 2011 07:03PM

Re: Actually.............. . .
"Dino" oils are not, in fact, better lubricants than full synthetics, which is why synthetics cost more, and are the preferred oil in high performance applications. The problem with the IMS bearing is that when the seals fail and the high pressure grease gets washed out, there is no real way for the engine to get a constant feed of oil to it under pressure (the IMS shaft is rotating and the bearing receives only "splash" lubrication), resulting in very minimal lubrication when compared to the original grease. grease, and when this starts to happen, the lower surface tension of the synthetics would actually be better than the “dino”. When the OEM unit starts to wash out, it also is not fully open to even the splash lubrication, making matters even worse, and causing the unit to really heat up. I think everyone overlooks the fact that heat transfer is a very critical function of oils, and synthetics are better at it than "dino" oils. Unfortunately, in the case of the OEM IMS bearing, the minimal splash lubrication when the grease washes out is not really sufficient to cool and lubricate the assembly, and because the components were not designed to run as hot as it becomes without the grease, galling sets in and the unit fails. With the LN unit, both seals are gone, and because the unit has way different materials of construction, the splash lubrication is more than sufficient to keep it alive.


I would not really even consider going to a non synthetic in these engines, their survival is already very dependant upon the characteristics of the synthetics.....
Changed By: JFP in PA
Change Date: January 04, 2011 06:53PM

Re: Actually.............. . .
"Dino" oils are not, in fact, better lubricants than full synthetics, which is why synthetics cost more, and are the preferred oil in high performance applications. The problem with the IMS bearing is that when the seals fail and the high pressure grease gets washed out, there is no real way for the engine to get a constant feed of oil to it under pressure (the IMS shaft is rotating and the bearing receives only "splash" lubrication), resulting in very minimal lubrication when compared to the original grease. When the OEM unit starts to wash out, it also is not fully open to even the splash lubrication, making matters even worse, and causing the unit to really heat up. think everyone overlooks the fact that heat transfer is a very critical function of oils, and synthetics are better at it than "dino" oils. Unfortunately, in the case of the OEM IMS bearing, the minimal splash lubrication wwhen the grease washes out s not really sufficient to cool and lubricate the assembly, and because the components were not designed to run as hot as it becomes without the grease, galling sets in and the unit fails. With the LN unit, both seals are gone, and because the unit has way different materials of construction, the splash lubrication is more than sufficient to keep it alive.

I would not really even consider going to a non synthetic in these engines, their survival is already very dependant upon the characteristics of the synthetics.....

Original Message

Author: JFP in PA
Date: January 04, 2011 06:50PM

Re: Actually.............. . .
"Dino" oils are not, in fact, better lubricants than full synthetics, which is why synthetics cost more, and are the preferred oil in high performance applications. The problem with the IMS bearing is that when the seals fail and the high pressure grease gets washed out, there is no real way for the engine to get a constant feed of oil to it under pressure (the IMS shaft is rotating and the bearing receives only "splash" lubrication), resulting in very minimal lubrication when compared to the original grease. think everyone overlooks the fact that heat transfer is a very critical function of oils, and synthetics are better at it than "dino" oils. Unfortunately, in the case of the OEM IMS bearing, the minimal splash lubrication ws not really sufficient to cool and lubricate the assembly, and because the components were not designed to run as hot as it becomes without the grease, galling sets in and the unit fails. With the LN unit, both seals are gone, and because the unit has way different materials of construction, the splash lubrication is more than sufficient to keep it alive.

I would not really even consider going to a non synthetic in these engines, their survival is already very dependant upon the characteristics of the synthetics.....