[Healeys] Dave Dougan's overdrive part 2

[Awgertoo at aol.com]

Again I am in 100% agreement with Randy.  I have tried  both the MTL and MT 
90 in both my 100 and the Elva Courier (MGA transmission)  and like the way 
the 90 feels.  The shifting seems to be just a bit more  positive and since 
I race the Elva I figure that heavier viscosity is  a good thing to deal 
with higher transmission oil  temps.  And using Castrol in any  grade many 
shifts were noisy and balky. 
 
Best--Michael Oritt
--------------------------------------
In a message dated 11/16/2009 12:02:39 P.M. Eastern Standard Time,  
Healey100M at gmail.com writes:

Seems to  me that you are mixing apples and oranges here.

MTL is an 70/80 wt gear  oil with the same viscosity as 5/30 wt. engine oil

MT90 is a 75/90 wt.  gear oil with the same viscosity of 15/40 wt. engine 
oil,
so the change  isn't from 30 wt to 90 wt.

I use MTL in the BJ8 and have found the MT90  works better in the 100's. 
100's
just leak the MTL out too much!   :-)