holstein13, Just wondering about a couple of things.
“3. I now have to fill a DEF tank that I didn't have to do with a gasser. Every other fuel fill up requires me to top off the DEF tank. And it's on the wrong side of the coach.”
4. My fuel fill inlet is right behind my driver's seat so it's very easy to gauge where to stop at the pump. I can fill from either side.”
Why since you can fill from either side don’t you fill from the side the DEF tank is on?
24. “There are only three buttons on my transmission R N and D. There is also an up/down arrow and an eco mode but I never use either.”
That is ECON button and it will improve your mileage. Not knowing how and when to use those arrows may contribute to damage to your engine. It could also degrade your safety.
Bill the Iceman aka the op that 2013 Thor Daybreak is a nice coach. Most of the things you need to know have already ben covered. I would look at a nice used coach as you can find some amazing deals. If you can afford it I would by new enough that you do have a coach that uses DEF. The newer coaches can and are tuned to give more HP and mileage. I don’t know of a builder that makes a coach that doesn’t have enough power.
Your question about additives, I add an antigel as it is cheap insurance. Where I live it is possible to get into cold weather and still have all summer diesel number 2. I got caught by a cold front camping on the top of Raton Pass in NM. It dropped to -5 overnight. I was glad when MY motor started with no problem. You can read your owner’s manual on using the block heater.
Yes owning a diesel coach is a little more expensive. So what owning a gas unit is more expensive than tent camping. I don’t do it because it is cheap I do it because I want to.
Bill