Compression Ignition Addict
Join Date: Sep 2007
Location: Versailles, KY
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Had my 06 KR for about two years now. Here's a few things I've learned...
Already mentioned - use only Motorcraft filters. I run Rotella 5w40 synth oil in mine. About a hundred bucks per change, it needs 3.5 gallons. Keep the oil changed for good engine life. The secondary fuel filter is easy to get to, on top of the engine. The primary fuel filter is underneath, and can be sort of messy to change as it's horizontal and you'll spill some fuel getting it out. Another tip for long engine life: in cold weather, let it warm at idle for a few minutes before driving, at least until it goes to fast idle.
You can tune it, but be aware that there's a lot more to it than just plugging in a tuner. Understand what you're getting into and do it right, so you aren't looking at expensive repairs later on. I left mine stock, and have been perfectly happy. Hotrodded the sound system instead.
Watch out for drive thru curbs with the dually, they'll rip up the rear sidewalls. Real easy to do. Why you should be concerned: I just replaced tires with Goodrich AT's. The bill came to $1350 at tire discounters. Ouch. Adds up when you're buying six tires.
The dually doesn't get good traction in snow, if the bed is empty. I put in about a ton of firewood when snow is coming, and that works great.
If you're upgrading the sound system, look at the JL Audio Stealthbox. It's a subwoofer that fits inside the center console, and puts out great sound for it's size. A bit expensive, but worth it, and it puts the sub right beside you, instead of behind the rear seat.
If you hear a scraping sound coming out of the rear axle that sounds like wheel bearings, pull the axle and look before buying replacement parts. (real easy to pull the axle on the dually) I spent $350 on a premium bearing replacement kit, only to find out that the bearings were fine. The scraping sound was corrosion on the emergency brake drum, rubbing on the e brake shoes. Five minutes with a paint scraper and heavy grade steel wool fixed that problem.
Best way to help fuel use is slow takeoffs, keep boost under 10. Get it over 65, and it starts drinking fuel like there's no tomorrow.
You can bully a SUV with this big truck. It's fun.
"Big Duke": 06 F350 King Ranch
long bed, crew cab, dualies