[TR] OD Oil

[glemon at neb.rr.com]

As I understand it non-detergent is recommended because detergent oils suspend small impurities, dirt, ground metal etc. with the idea that the oil filter will screen them out.

In a gearbox, or really old car with no oil filter, you want the dirt and such to settle to the bottom rather than float around and cause trouble.

I think the multi viscosity additives promote the foaming.  But I am not chemist or engineer, have just spent too much time reading about this stuff.

Greg Lemon
TR250

---- TERRY SMITH <terryrs at comcast.net> wrote: 
> Thank you all for responding.  I kinda thought it was the foaming issue.  I seem to recall this, but don't know if it's accurate:
> 
> 
> Non-detergent in the engine, to eliminate foaming at the mouth.
> 
> Non-detergent in the tranny to eliminating indigestion.
> 
> Non-detergent in the rear-end to eliminate...well, I won't go into it...:0)
> 
> 
> That about right??
> 
> > On June 19, 2018 at 2:47 PM "Wbeech at flash.net mailto:Wbeech at flash.net " wrote:
> > 
> > 
> >     MT 90 in my ‘58 w/OD, never misses a beat.
> >     Bill B
> >     TS30800L
> > 
> >     Sent from my Apple II+
> > 
> >     On Jun 19, 2018, at 12:59 PM, Jeff Scarbrough wrote:
> > 
> >         > > On Tue, Jun 19, 2018 at 1:34 PM, TERRY SMITH wrote:
> > >         Hello, everyone. Now I've got the OD sorted and working well consistently, I thought to turn attention to the OD oil. I'm running MT-90 now, mostly because it's the most highly recommended by you all and it was necessary to eliminate every possible variable that might have been contributing to the OD woes I was having.
> > > 
> > >         When the OD was rebuilt, the technician put in simple Napa 30 weight oil. He was convinced it worked just fine.
> > > 
> > >         So my question. I've forgotten whether it was non-detergent. I suspect so,since wouldn't that give it more grip????
> > > 
> > >     >     I think the ND is to eliminate foaming. I started with 30 weight
> >     Non-Detergent in mine, but switched on the second change to MT-90.
> >     Works a treat.
> > 
> >     Jeff Scarbrough
> >     Corrosion Acres, Ga.
> > 
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