Re: motor oil; detergent v non-detergent

Posted by Rob on May 25, 2005 at 11:01:30 from (63.245.133.37):

In Reply to: Re: motor oil; detergent v non-detergent posted by I don't buy this argument on May 25, 2005 at 10:03:06:

I think it"s undisputed that detergent oil does a much better job of suspending material and that the material does settle out and form a sludge when using ND oil. I believe it settles out and accumulates in the passages when it"s running because the oil drains into the pan when it"s shut down.
Some filter is better than no filter (I think, but Bob says bypassing a filter means cleaner oil in one of his replys) but they went to full-filter when they went to detergent oil. They work together to remove the material while keeping it out of the bearings. That"s pretty easy to understand.
Henry didn"t specify the oil! I quote the 9N manual: "Engineers have made a careful study to determine what type of lubricant will most effectively combat friction and reduce heat in the various units. The recommendations listed in our lubricating charts are the result of long study and experience." Henry didn"t call that shot and I"m confident he didn"t sit down and write manual.
Detergent is not a corrosion inhibitors and ash is used to neutralize acid in crankcase oil. ND oil can and does contain both corrosion inhibitors and ash. I believe it"s ash anyway.
Amsoil states that "SL [latest API S-series class] oil may be used in any engine, unless the engine manu�facturer specifies a �non�detergent� oil." I assume that goes for earlier API S-series classes. My top post gave one big reason why an oil company would make that statement. Seals and gaskets are another reason with Amsoil stating that "[a]ll motor oils must be compatible with the various seal materials used in engines. Oil must not cause seals to shrink, crack, degrade or dis�solve. Ideally, oils should cause seals to expand or �swell� slightly to ensure continued proper sealing." Old-fashioned non-detergent oil will be compatible with the sealing materials used in the N engine.
If you want to use a multi-season oil and stay in spec you might go with S.A.E. 20W-20 where the "W" means "winter" performance and starts cold thinner and get heavier in the heat like other multivis ratings. That"s good from +10 to +90 degrees. If you can find it in ND.
I have no idea when detergent oil became available but I would not be surprised to find that it was available when these tractors were built. How do you know it wasn"t availble back then?

• Amsoil

Follow Ups:

• Re: motor oil; detergent v non-detergent Bob 11:11:34 05/25/05 (1)
  • Re: motor oil; detergent v non-detergent Rob 11:19:04 05/25/05 (0)

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