Oil Change Frequency after LN IMS Bearing

[newBgeek]

Originally Posted by JFP in PA

No special characteristics are required to get splash lubrication; the bearing is partially submerged in sump oil when the engine is not running, and the normal misting and oil splash in the sump is more than enough to keep it lubricated as there is no rear seal. And as it takes very little oil film to properly lubricate and cool a ceramic hybrid bearing, you need to view that particular video with more than a grain of salt.

Jake, thank you for answering all of my questions. I learned a lot today!

My next question was answered in your website, the LN retrofit is rated for 50,000 miles, which means I can look forward to another replacement in about 3 years

I think when the time comes, I'll return to the stock Porsche bearing with the improved seal. It seems to me that relying on splash lubrication in a part of the engine which was never originally designed for splash lubrication will have a lot of variability, like your driving style. Mine is a daily driver highway cruiser, which is probably the worst scenario for lubricating the bearing. You really need to "drive it like you stole it" for the best lubrication. I can imagine explaining that to a police officer, "Just lubricating my bearings, officer!" lol

[JFP in PA]

Originally Posted by newBgeek

Jake, thank you for answering all of my questions. I learned a lot today!

My next question was answered in your website, the LN retrofit is rated for 50,000 miles, which means I can look forward to another replacement in about 3 years

I think when the time comes, I'll return to the stock Porsche bearing with the improved seal. It seems to me that relying on splash lubrication in a part of the engine which was never originally designed for splash lubrication will have a lot of variability, like your driving style. Mine is a daily driver highway cruiser, which is probably the worst scenario for lubricating the bearing. You really need to "drive it like you stole it" for the best lubrication. I can imagine explaining that to a police officer, "Just lubricating my bearings, officer!" lol

That mileage rating is very conservative; we have several customers that are way beyond that mileage and are showing no signs of problems. I would not be overly concerned about that number.

[Jake Raby]

Originally Posted by newBgeek

Jake, thank you for answering all of my questions. I learned a lot today!

My next question was answered in your website, the LN retrofit is rated for 50,000 miles, which means I can look forward to another replacement in about 3 years

I think when the time comes, I'll return to the stock Porsche bearing with the improved seal. It seems to me that relying on splash lubrication in a part of the engine which was never originally designed for splash lubrication will have a lot of variability, like your driving style. Mine is a daily driver highway cruiser, which is probably the worst scenario for lubricating the bearing. You really need to "drive it like you stole it" for the best lubrication. I can imagine explaining that to a police officer, "Just lubricating my bearings, officer!" lol

There is no "stock Porsche bearing"... Never has been, never will be.

My development of the IMS Retrofit included engines that saw nothing but idle speed for several hundred hours. At idle speed the bearing sees more than enough splash lube, even with idle being the highest load the bearing sees, ever.

The record is an engine idling for 265 hours straight without being shut off at all. Then it came apart and was reviewed.. Then reinstalled and ran wide open for 4 solid hours, so long that the exhaust bolts broke in half and fell onto the dyno.

You don't need to drive it like you stole it for the bearing to live with splash lube. Quit listening to people who don't understand the topic they are writing about.

[mnc-i]

Perfetlap,

Thanks for the info.

I promised myself that I would purchase a 996 series (1999 - 2004) 911 once I clock 300,000 miles.

Can you tell me which model year 996s, if any, came with dual row bearings?

Any assistance you can provide is greatly appreciated.

MNC-I
P.S. "I just purchased 10 quarts of Royal Purple 20W50. The label states zinc/phosphorous fortified."

[JFP in PA]

Originally Posted by mnc-i

Perfetlap,

Thanks for the info.

I promised myself that I would purchase a 996 series (1999 - 2004) 911 once I clock 300,000 miles.

Can you tell me which model year 996s, if any, came with dual row bearings?

Any assistance you can provide is greatly appreciated.

MNC-I
P.S. "I just purchased 10 quarts of Royal Purple 20W50. The label states zinc/phosphorous fortified."

The 996's mirror the Boxsters; 1997-2001 (partial) run dual rows, 2001 (partial) - 2005 (partial) run single rows, and 2005 (partial) - 2008 run the oversized third design IMS bearings. The model years noted as "partial" are transition years and the cars could have had either design, and the only way to know which is in the car is to take it apart and look.