Ant,
Glad you brought this up. Maybe some insiders on the forum can give us the real story on lubricants.
I used to be a big Valvoline fan, until I saw a television special showing an
oil distribution center filling up all the bottles, Quaker State, Castrol, Valvoline and others with the same
oil. Now I just buy whatever 10W30 is on sale for the "regular" cars and whatever 20W50
synthetic is on sale for the Cobra.
I would bet that someone on this board can substantiate this.
I did go to a lot of trouble to get Redline ATF for the Tremec, due to a write up on this board. It actually made shifting a little more difficult.
Paul