[AT] It's a Cub! Update

[Dan Glass]

I think you are right about detergent oils, I run it in everything also.
I prefer the mineral oils in engines that don't get run that much.  
Synthetics do lube much better, but it tends to pull moisture out of the 
air.  In a car that is run often, the engine heats up enough to 
evaporate the moisture.  In a tractor that may not get run for a couple 
of months the moisture stays in and you often see rust line at about the 
oil level.

Ronald L. Cook wrote:

> I think the problem lies in the name...detergent.  It will sort of 
> clean up your dirty hands alright, but only by rubbing them together 
> as you would when washing with soap and water.  Simply pouring 
> "detergent" oil on something will remove very little if anything.  It 
> will not clean up a sludged up engine.  What it does is keep 
> contaminates in suspension so the filter can grab it or you can drain 
> it out.  If something large enough just happens to be floating around 
> in there that would plug up an oil passage, then I suppose you could 
> blame the oil.  I am not really sure that is where the blame lies, 
> however.  I have changed over from "non-detergent" to dispersing oils 
> in everything from Hit & Miss engines to aircraft engines.  So far I 
> have had no problems using better oils.
>
> On an oil related subject, I do prefer mineral oils over synthetics.  
> They seem to protect against rust better.  Just my couple of cents.
>
> Ron Cook
> Salix, IA
>
>> Just curious, I've read the same thing.  Since detergent oil was 
>> common by the 70s what chance is there that these old engines haven't 
>> already seen it?  Given that all four of my tractors seem to have 
>> encountered less than good treatment (all early to mid 50s) at some 
>> point in their life I wonder if the folks who owned them were all 
>> that careful about the oil?
>>
>> Does anyone have experience where the crud was actually set loose by 
>> detergent oi?
>>
>> Not meaning to quibble just my thoughts and I'm curious.
>>
>> Dana
>> SE PA
>
>
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