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281MERC
03-18-2010, 06:39 PM
just wondering what people are using for there 4.10 swap?? brand? viscosity? additives??? thanks.
fastblackmerc
03-18-2010, 07:17 PM
Redline 75w140 I think. Don't need friction modifier.
SpartaPerformance
03-18-2010, 08:27 PM
Royal purple, don't need friction modifier either. Enjoy them!!
Black_Out
03-18-2010, 08:58 PM
I'm using royal purple 75w90 in the crown vic
rayjay
03-19-2010, 03:54 AM
Royal Purple with friction modifier. It came with the install kit and the Master Tech doing the install recommended using it.
babbage
03-19-2010, 05:33 AM
AMSOIL 75w-110 No Friction modifier needed.
ctrlraven
03-19-2010, 07:12 AM
Mobil 1 75w-140 until the 4.10s go in then Royal Purple 75w-140.
GreekGod
03-19-2010, 02:36 PM
$10.57/quart SUPERTECH 75W-140 full synthetic gear lube from WalMark, plus 1 bottle (4 oz.) Motorcraft XL-3 friction modifier additive.

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2,4shofast
03-19-2010, 02:48 PM
Royal Purple with friction modifier. It came with the install kit and the Master Tech doing the install recommended using it.


This is what I have as well 75W-140