Tom,
Having driven (hard) a '67 B-GT and a '71 B-GT, both with overdrives,
for a total of some 200,000 miles, I can assure you that Castrol GTX
20W50 is the right stuff!
As far as I know, the only non-detergent oil is a mineral oil, and I
haven't seen any of that since the racing days of the '60s. (You always
knew when a race car was running Castrol Mineral oil by the different
smell. Would you believe hot cod liver oil?) :-)
Shel '74 B-GT (with the o/d tranny out of the above '71)
Tom Wagner - Program Manager wrote:
>
> To All of the wisdom :
>
> I have a 67 "B" that is in bad need of
> transmission oil. This is a 4 speed all
> synchro with an LH type OD unit. The manual
> says to use 20W50 Castrol, but people on the
> net say to use 30W, detergent - non-detergent.
>
> So Questions #1: Who is right????
>
> Question #2: How can you tell if the
> SAE 30W is detergent or non-detergent oil???
>
> Question#3: What is the correct weight and is
> it to be non-detergent or detergent oil.
>
> Thanks for the clarification in advance.
>
> Tom Wagner
> 67 MGB
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Shel Bercovich sbercovi@cadvision.com trcr@canuck.com /\
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