15-40 oil Total Base Number HELP

Posted by d3,Mike on November 08, 2002 at 22:35:44 from (66.81.190.11):

Hi, I would appreciate your views on the high TBN numbers used in most diesel oils used today. I understand that emission controls and longer change intervals make this a requirement. The problem is that I have a newly rebuilt, 1964 Perkins A3-152, that idles a lot and seldom sees much throttle. I also use .05% diesel.This throws the old TBN rule of thumb of about 20 times the sulfur content, for indirect engines, out the window! I know that Cat warns about cylinder polishing and loss of oil control when using a excessively high TBN. and I have heard of other older diesels loosing oil control when the new CI-4 oils are used in engines that do not see a lot of heavy load.
So, any thoughts on how high a TBN can be, before it is to high? Also what is a reasonable limit on ash? I would like to use 15-40. Any thoughts or recommendations on my problem would be greatly appreciated!
Thank You for your time, Mike d3@pcmagic.net

And yes I did contact Perkins in England, they recommended API CC , I told them that CC was obsolete by about 15 years and they said that they could make no further comment on the subject!

Follow Ups:

• Re: 15-40 oil Total Base Number HELP payman khabbazpour 03:52:52 10/15/03 (0)
• Re: 15-40 oil Total Base Number HELP Mobil Delvac 1300 08:32:58 11/09/02 (1)
  • Re: Re: 15-40 oil Total Base Number HELP d3 Mike Thank You 00:54:28 11/14/02 (0)

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