I'm looking at a 2017 F350 with 6.7 PSD, the ad said it runs on Biodiesel. Why only Bio? how difficult is it to find Bio, and how much more expensive??? What do we know about 6.7 reliability, issues? years to avoid?

 

6.7 PSD runs on up to B-20, that is 20% bio fuel. Most places you find will have *some* bio blended in their fuel, but not more that 20%.
The 6.7 itself is reliable, the CP4 injection pump??????????? Emission equipment ????????? 6R 140 transmission is pretty much bulletproof if everything is in stock form.
Buying a modern diesel, make sure it hasn’t been tuned, deleted, etc. and no tuner. I would personally take it to a Ford shop and get it checked out before dropping dollars only to find out I bought someone elses headache.
Good luck

 

Thank you Don, going over to look at it today.