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Forddan · 05-22-2019, 10:57 PM

Hi

I have a Tudor from January 1929.

Does this car have yellow metals in the transmission ?

In another thread of mine about STP it was mentioned that I have to be careful because it contains zinc anti wear ZDDP. And that supplement will affect yellow metals.

Can someone confirm me if I have to be worried if I mix 50/50 STP with 600w oil with respect to those metals. Unless my car do not have them and then there is nothing to be worried of.

Thanks
Daniel

05-22-2019, 10:57 PM	#1
Forddan Senior Member Join Date: May 2019 Location: Westford, MA Posts: 195	Yellow metals in Ford A transmission Hi I have a Tudor from January 1929. Does this car have yellow metals in the transmission ? In another thread of mine about STP it was mentioned that I have to be careful because it contains zinc anti wear ZDDP. And that supplement will affect yellow metals. Can someone confirm me if I have to be worried if I mix 50/50 STP with 600w oil with respect to those metals. Unless my car do not have them and then there is nothing to be worried of. Thanks Daniel