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What is the deal with low ash oil ?

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rick 48 cub
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What is the deal with low ash oil ?

Postby rick 48 cub » Tue Jan 31, 2006 8:43 pm

Is there a significant difference between how the Cub engine reacts to low ash vs. standard motor oil ?

Are there circumstances where I should use one or the other ?

My engine is freshly rebuilt (sluge free).

Thanks for all of the great advice!

Rick
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allenlook
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Ash

Postby allenlook » Tue Jan 31, 2006 8:54 pm

I don't use low ash oil myself, but I tend to replace my oil awfully often just because I'm tearing into the engine all the time, and Wal*Mart oil is so darned cheap. I believe I have Citgo in it now.

"Low ash" is, I believe, a way of saying "low % of sulfated ash", which is a measure of how much black stuff is left over after an oil is burned. Low ash oils leave less schmoo behind as they are consumed, and a couple of sites I checked through Google had the same statement verbatim that low ash oils are at least anecdotally related to longer valve life...
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Postby Rudi » Wed Feb 01, 2006 9:57 pm

Rick:

Randy, who is my local CaseIH dealer's top mechanic emphatically insists that I use Low Ash oil in my C-60. The C-60 was designed to use low ash and runs best on it. I don't know how to explain the specifics of it, but it is available online I think at CaseIH home page.

If you look at Ellie's pistons when I took off the head, you will see why Low Ash is recommended... very low ash deposits on the piston tops even after all those years...

I think I am going to keep using the low ash... Ellie seems to like it and I am putting Granny on a solid low ash diet as well.....
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Postby Patbretagne » Thu Feb 02, 2006 1:21 am

In Europe generally one doesn't hear of "low ash", there is the cheap supermarket stuff, there is Shell, Esso, etc in various grades and prices, then we go to the agricultural repair shop and it is (here in France) Igol no nonsense, good quality, detergent oil (nearly all diesel here) that we buy in 50 litre "bidons"
Noëlle and I use this oil in all our engines, cars, vans, Landie, all tractors, lawnmowers, generators, garden cultivator.
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Postby John(videodoc) » Thu Feb 02, 2006 9:34 am

hey rick in Kens new book, "Orignal Farmall Cub and Cub Cadet", he states, "low ash oil reduces valve torching and keeps the engine cleaner."
Thats enough of a reason for me

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Lo Ash Oil

Postby SteveC67 » Thu Feb 02, 2006 9:59 am

Case/IH "Low Ash" oil is good oil to use because of the reduction of engine deposits and several other reasons. "Low Ash" has been a marketing trademark for IH for many years.
Remember however that Cubs were designed in the 1940's and oil quality was generally poor. No additives, no viscosity improvers, no detergents, etc. and motor oil base stocks were inconsistent at best.
The cheapest oil at Walmart today is much better than the oils available for farm use in the 40's-50's.
For most of us that use our Cubs infrequently, water condensation is the most severe condition that the oil needs to accomodate. Engines rarely operate long enough to evaporate the water that condenses in the crankcase. The additive packages in today's oils are much better at handling the water but there are limits.
It is important to change the oil for that reason even if operating hours are low.
I DO use the CNH oil in my Cubs because of the up to date additive package.

rick 48 cub
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Postby rick 48 cub » Thu Feb 02, 2006 7:01 pm

Thanks for all of the priceless info. Rick
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