Erik,
Problem is the Roadster Crankshaft has a flange on the rear,
so you would have to use a two piece rear main seal.
On the later Datsun's (510 & 240Z) there is no flange on
the rear, so the one piece rear main seal just slips over the
end of the crank.
Personally I like running the Castrol Blend 20W50.
Of course after looking at how much the Toyota Land Cruiser
leaks out the rear main seal (Look, Ma... no rust under here!)
I don't worry about the spots from the roadster. ;-)
Cheers,
Tom Walter
Austin, TX
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