[Healeys] Redline MTL

[Dave Russell]

Hi Steve,

Don't know about the cost. I don't change it that often. I consider it 
well worth the cost. I use RL MT-90.  It certainly improves OD clutch & 
gear box synchronizer operation  for me.

Gear oils are viscosity rated at different temperatures (lower) than 
motor oils. MT-90 is a 75W-90 gear oil & is equivalent to a SAE 10W-40 
motor oil. Redline MTL is  a SAE 70W-80 gear oil & is equivalent to a 
SAE 5W-30 motor oil. Both oils are rated as API GL-4 oils.

Regards,
Dave Russell

BJ8Healeys wrote:

>Hello, Healeyphiles -
>
>Since my overdrive sticking problems have coincided with a need for a
>regularly-scheduled gearbox oil change, I thought it might be time to try
>the Redline MTL that so many have raved about.  Of course, my local Advance
>store is out of stock (probably not "out" - just didn't order any in the
>first place).  But from their catalog I noticed two things:
>1.  MTL is 75W/85W.  That seems a might thick, compared to the 30W
>non-detergent I have used for 25 years.
>2.  MTL costs $14 per quart.  That seems a might steep, compared to the
>$1.99 per quart for 30W non-detergent.
>
>So, the cost for a twice a year oil change will go from about $8 to $56.  Is
>the difference in performance worth that?  75W/85W is close to the viscosity
>of rear axle oil.  What about the manual caution against using heavy oils in
>the gearbox?  Is that caution obsolete now?
>
>Happy Healeying!
>Steve Byers
>HBJ8L/36666
>BJ8 Registry
>Havelock, NC