4 year old diesel---pitch it? or use it?

My truck has been sitting for four years; I've been busy.

I'm about ready to crank it up again and I was wondering. Does diesel go bad like gasoline?

Should I discard the diesel that is in the tanks? OR Should I remove it and put in some fresh?

Also, should I replace the fuel filter before I start the engine; I don't know how much use it got before I bought the truck.

The engine is a CAT 3406b.

Thank you again for your assistance.

 

Thanks!

 

That has a ring of truth to it! Spot on!

 

Thank you!

By short do you mean 20 minutes?

Or two hours? I actually plan to move the truck down to my home soon.

 

So, I just checked the fuel tank and it has quite a bit of brown sludge on the bottom. The sludge clogged my siphon bulb while trying to get a sample (pics below).

There are about 25 gallons of diesel between the two tanks.

I don't want to beak down because of a clogged fuel filter. The towing bills around here are about $7000. And, then there is one company in the area that charges $27,000 to $61,000 NC drivers question ‘astronomical’ tow bills They are located out of Statesville, NC; I won't deal with them, but sometimes highway patrol calls them because they are next on the list.