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Regarding breakin period; I feel that my engine has seated the rings by now and can feel a difference in power. Since the factory doesn't use a "breakin oil" and it is all synthetic, it takes alot longer to seat rings. I had one fellow tell me his didn't really feel broken in until he hit 40k. That was an '06 V-10. Alot depends on how hard you run it. Towing heavy up a long mountain a few times should do the trick, but I wouldn't do that until you had about 5-10k on the engine. Just towing on more or less level ground surely won't hurt, no matter what.
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2002 F-350 SRW Lariat,4X4, PSD with too many goodies to list. 182k and a very strong 7.3. SOLD
2008 F-250, SC Lariat, 4X4,Shortbed, Pueblo Gold/black, V-10, 4.10, auto, Delivered on 9/7/07, great looking rig. South Texas bumpers front/rear, Air Raid Intake System, Diablosport Predator, Magnaflow, Husky's, JJ's, Ford alarm/remote start, Marathon seat covers, Sirius, PIAA, Access cover, Weatherguard tool box, Rhino liner, Michelins, Duraflap mud flaps, Escort 9500i, MagHytec rear dif cover.
2007 Lincoln LT (wifer's grocery getter),Superchip,Magnaflow duels, K&N dropin, Leer Browning Special
1996 Ford Bronco EB; almost stock
2007 Kubota 900 RTV diesel with goodies.
pappy's truck
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