Diesel engines? Check out AvWeb this week. An operator has filed suit against Thielert over the engines in their Diamonds. I'm not sure they are there yet.
As to the rest of the rants, Hammer commented about all these 180 fans who don't own 180's.....I'm also one.
My story is I bought one, floats, wheels, wheel skis for $27 K. A few years later, being a single guy living in Kodiak, I sold it and bought a Super Cub. I rarely left Kodiak in those days, for a lot of reasons, except on a jet. The Cub worked fine till I got married. Then it didn't work at all.
By then, prices of 180s had skyrocketed, and there was no way I could justify, EVEN IN MY MIND, that kind of money for an airplane. Found a pretty good 170 with a 180 and still have it today.
Now, moved to MN. If it weren't for the &&909-- SALES taxes and registration taxes here in the Land of Ten Thousand Taxes, I'd have sold the 170 and bought something else--maybe a 180, but probably something with folding wheels. Or maybe a 180, now that prices have slid a bit. But, I'm damned if I care to hand the state of MN a wad of money to change planes, and the 170 does much of what I want to do. It's not and never will be, IFR approved, and it's slow.
I'd consider a 180 in a heartbeat, though, if I was in the market.
As to fuel burn comparisons between fuel injected aircraft and carbureted ones--the carbureted engine will never run as efficiently as the fuel injected one, because fuel distribution with the FI engines is so much better that you can lean much more aggessively. Also, its easier to run LOP with a fuel injected engine.
I think, though, if you look at the mpg parameter, with the 185, you are probably better off to crank the power up a bit and go faster at altitude, than to dog around at low power.
Any time I've operated engines with lots of power I've been inclined to use that power, whether in cruise or takeoff. That's probably human nature, but not required.
I ran a 200 hp Husky, and I could get the fuel flows down to one gph less than a 180 Husky WITHOUT going lean of peak. Difference was the FI system.
I'm with G3 on this one: If you want it, get it. If you can't afford it, sell it and buy something you can afford, or sell your other stuff to support your habit.
But, DON'T agonize over what flying costs. If you do, you'll stop flying.
MTV