fj12ryder wrote:
Buying fuel at a cheaper station is just one of the bennies of extra fuel. The main benefit is stopping when you want to, rather than when the truck demands it.
With my Durango, I plan a stop to meet both needs at once. To me there is no benefit to stopping for my break and not filling up at the same time. If I need to stop every 400 miles, then having a fuel tank that will get me 500 miles is pretty much ideal. I drive 400 miles, stop for me and fill up, then go another 400 miles. And I always have an extra 100 miles if there is some problem getting fuel at the 400 miles marker.
With an extra tank that will get me 600 miles, what do I gain? 800 miles? Again, what do I gain. I'm still stopping every 400 miles.
Now, if I can happily drive 1,000 miles without stopping, then that extra tank makes more sense. But, you also have to account for any passengers - can THEY last that full 1,000 miles without stopping? Or are you gonna have to stop regardless of your tank quantity?