What fluid do you run in your primary?
Extreme HDF Member
Joined: Sep 2005
Posts: 11,615
Likes: 50
From: Baton Rouge, LA
OTOH Syn3 works well in the primary, but you don't need a $10 (or whatever) oil in that location, as I mentioned in an earlier reply. A $3 20w50 fossil engine oil like Castrol GTX works as well.
In the engine there are better solutions for the price, IMO. Syn3 won't inflict premature wear on your engine and without price being a variable is well-suited for the primary, but I wouldn't run it in the tranny.
Road Master
Joined: Jun 2007
Posts: 958
Likes: 1
From: Birch Bay, WA
Syn3 is an average synthetic oil at an exorbitant price, but although HD okays using it in the tranny I wouldn't do it. Gearboxes should run gear oil, IMO, and an 85w140 works best in my '07. Pick your choice from among quality synthetic brands.
OTOH Syn3 works well in the primary, but you don't need a $10 (or whatever) oil in that location, as I mentioned in an earlier reply. A $3 20w50 fossil engine oil like Castrol GTX works as well.
In the engine there are better solutions for the price, IMO. Syn3 won't inflict premature wear on your engine and without price being a variable is well-suited for the primary, but I wouldn't run it in the tranny.
OTOH Syn3 works well in the primary, but you don't need a $10 (or whatever) oil in that location, as I mentioned in an earlier reply. A $3 20w50 fossil engine oil like Castrol GTX works as well.
In the engine there are better solutions for the price, IMO. Syn3 won't inflict premature wear on your engine and without price being a variable is well-suited for the primary, but I wouldn't run it in the tranny.
spiz
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