Thor Gemini Questions

Well, I can address DEF: it's a fluid that's added to a seperate tank and helps diesels burn cleaner. As someone who basically hates diesels - it makes them not stink ;-)

How much you use depends on how the vehicle is used - but a 5-to-10-gallon tankful of DEF generally lasts a long time. Months, in many cases. And when you need more, it's readily found at any truck stop, Walmart, etc. You can find a DEF pump that looks like a fuel pump at diesel islands; or you can buy it by the 2-gallon jug and add it with a funnel.

Most vehicles will give you a HUGE warning before you run out - something to the effect of "300 miles to empty"

Look on the forum for reviews about Thor coaches. I think you'll see a negative trend towards their quality.

I have ruled out this unit for several reasons. The main being that you have to crawl under the rear of the RV to get to the generator. There is no side access so I can imagine it would be a bit of a problem to check and change the generator's oil. It was also too cramped for the money. A 22 foot class C is a much better bargain for a lot less.