Mark -
The difference is the additives. I only put in either MT90 or non detergent
30 wt motor oil in my gearboxes.
multiwieght and other standard motor oils are no good because they have
additives which suspend particles in the oil... to take them to the oil
filter. Also, the anti-friction additives make the synchros not work real
well.
I switched to MT90 and noticed the difference immediately. Much easier
shifting.
Alan
'52 A90
'53 BN1
'64 BJ8
On 8/25/06, Mark and Kathy <mgtrcars@galaxyinternet.net> wrote:
>
> Now I'm really confusered.
>
> So why did I just put $7.00/qt MT90 in my trany instead of $1.40 10/40.
> Hmmm?
>
> Thanks Guys, Mark
>
>
> ----- Original Message -----
> From: "Dave & M" <rusd@velocitus.net>
> To: "Roland Wilhelmy" <rwil@sbcglobal.net>
> Cc: <GSFuqua1@aol.com>; <tomfelts@earthlink.net>; <healeys@autox.team.net>
> Sent: Friday, August 25, 2006 1:27 AM
> Subject: Re: OD Concern----revised
>
>
> > Right on, Roland,
> >
> > The main difference in the viscosity ratings is that:
> >
> > Engine oil viscosity is SAE rated at 210 degrees F.
> > Gear oil viscosity is SAE rated at 100 degrees F.
> >
> > For example, Redline lists their MT-90 as a SAE 75W90 gear oil with the
> > same viscosity as SAE 40, 10W40, & 15W40 motor oil.
> >
> > Regards,
> > Dave Russell
> > BN2
> >
> > Roland Wilhelmy wrote:
> > > If I remember right, 90 weight gear lube has the same viscosity as
> > > either 30 or 40 weight engine oil. To go from apples to oranges you
> > > need a translation. I don't think anyone has 90 weight engine oil.
> > >
> > > -Roland
> > >
> > > On Thu, 24 Aug 2006 23:12:25 EDT, you wrote:
> > >
> > > ::I'll add my 2 cents here for what it is worth. I agree with David
> > > & Dave on ::O/D working. What I haven't seen is if he really has 90
> > > wt oil in the ::tranny. If he does, that is not correct and could
> > > cause problems. :: ::Cheers, :: ::Gary Fuqua :
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