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Subject:Re: GL4/GL5?
From:Lawrence Johnson
Date:Sat, 29 Jan 2000 22:28:31 -0500
> <snip>Otherwise, Redline MTL and MT-90 are the only synthetic GL 4 oils on the
> market.

AMSOIL makes a 100% synthetic GL4. It  is meant for tractors and lower gear boxes
of outboard motors but I put it in both the differential and transmission on our
'86 Syncro Westfalia.

It is a lot cheaper than Redline and almost as good.
Larry