I know diesels have a much higher (milage) life span than gasers, but how about the opposite?...........would a diesel suffer more as a result of infrequent usage than a gaser?

Anything that sits and isn't used will suffer. Rubber and any seals will dry out. The worst thing for anything mechanical is to sit!!

FWIW. A few years back a friend gave me a Yanmar diesel utility tractor that was sitting for 5 years. Put a battery and fuel in, got it running and used it for another 4 years before I upgraded.

I have mixed feelings on this because I always look at our 1982 JD backhoe that sits all the time outside in the rain and starts instantly with a half dead battery every time.

I also look at people with extensive car collections that have things that sit and only get driven once or twice a year.

That being said I love driving diesel trucks and would find a reason to drive it no matter what

How infrequent? I bought a 2007 F350 in the fall of 06 and have less than 25K miles on it. It sits for weeks but not months. Its actually been getting more use the last 2 years since I started hauling to road races.

Sitting outside is the worst for a car/truck. At least in the northeast. Any truck with low miles is rotted bad and yet my gmc I just sold with 335,000 on it was real clean. If you have a garage to keep it in it won't matter much. Some of the seals may leak here and there but nothing major.

the fuel itself would be the biggest issue...thats why diesel boats that sit(as many big ones do) have tons of issues, most all due to alge growth in the fuel..then clogs pump, injectors, filters etc...

how long is long .. i put up my 13 f350 i just bought new .. didnt want to run in wisconson winters . i have several other vehicles .so it sitting wasnt an issue . has lift .aftermarket rims ect . i hate the look of rust .. ive added addatives as per fords recomendations .. hope im not making poor decission .

I wasn't talking about sitting for a few months at a time. I'm talking if something sits unused for years

[ATTACH=CONFIG]516123[/ATTACH][ATTACH=CONFIG]516124[/ATTACH]I bought my 08 2500 HD new in 08 and it just turned 20k miles. It sits inside year around but only gets run in the summer months to pull the boat. I treat the fuel and service enerything when I park it for the year. No issues here