Tow Vehicle research

Picked up an '06 F350 dually 4x4 last March with only 28k miles. After much research, I found that what these engines need is a thorough coolant flush and then an add-on coolant filter. Seems it was intended to be a school bus engine with no emissions control stuff and a different (if any) kind of oil cooler. The actual maker never fully flushed out the silicate used to cast its block and this fine sand kind of stuff will clog the EGR and oil cooler causing disastrous results. So far we've got about 5k miles towing our '10 Montana 3665RE, usually pretty loaded & with a lot of stuff in the bed and no issues at all. The first spin-on coolant filter still gets hot with the engine, so I'm going to change it with oil changes for a while. Some will tell you that a dually isn't needed and they're difficult to get around in. All I can say is that compared to my old single & 27' TT, it's actually a pleasure to drive with that 37' 5er. No noticeable side wind problems either. It is wider and longer (full size bed, full crew cab), but we just park out a ways at malls & the like.