Join Date: Sep 2012
Location: Central Valley, Sierra Mountains, California
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5W/40 will most likely run better then the RevX, talk with Ford and have them switch viscosity. A lot of the dealers are using it now. The reason it was specd for 15W/40 was because 5W/40 was not yet made. My truck starts up like the day it was brand new with 5W/40 and same injectors with 0 stiction issues 80,000 miles, runs like a finely tuned Swiss Watch.
There is a huge difference between synthetic and natural oil. It has better lubrication qualities doesn't break down as fast or become acidic like dino oil does. It's better and engines last longer when used. The choice is obviously yours to make but the difference is as clear as night and day....................
2006 F250 LARIAT CCSB 4X4
ARP Studs, O-Ringed Heads
X4 PHP 65 HP Custom Tow Tune
Atlas40 or Atlas80 Ficm Tune
CAT EC-1 Coolant, IPR Coolant filter
BPD Waterpump, BPD way of thinking
Fass-125 to a Adjustable Pressure Reg.
Turbo-back SS 4" pipe, Corsa Muffler -7" Tip
6.4 starter, DC Power 270 amp alt
Die Hard Platinum AGM all 2/0 Cables
Fabtech Radius Arms
7" lift w: Icon Progressive Coil Springs
2008 up Carli/Deaver rear springs
All riding on some Fatty-Daddy 38/15.50/18 Toyo's
Last edited by mhatlen; 04-12-2013 at 02:51 PM.