On 28.01.2020 14:40, Michael MacLean via Mgs wrote:
> I know all the manuals say to use 20w-50 motor oil for the
> transmission. Most of those manuals were written back when Castrol
> GTX 20W-50 was formulated differently. Does the new lower ZDDP content
> make a difference in the transmission? I have a regular 4-speed trans
> in my 69 GT. The car is new to me and I would like to start from
> scratch with all the fluids in the car. Probably not a good idea to
> even get into what engine oil to use.
> Mike MacLean
> _______________________________________________
>
It's unlikely that any manufacture's 20-50 will have the lower ZDDP -
that standard applies to modern oils such as 0-20, or 5-20. Shouldn't
make a difference in a transmission anyway.
Steve
--
Steve West-Fisher
N4IK
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