Old emissions vs new

[John Doe]

Hi everyone, I’ve been lurking around this forum for a while and figured I’d introduce myself and ask some questions.

I’ve got a 2016 prostar with an isx and it has been free from emissions related issues since I bought it. I follow the guidance of keeping idling to a minimum and change the oil every 25-30k miles. I’m thinking about adding another truck.

I’ve seen a lot of fluctuations in the prices of trucks lately, especially pre emissions trucks and the newer emissions trucks 2017+ One thing that hasn’t changed though is the bargain bin trucks from 2008-2014 the prices on them hasn’t gone up because everyone knows they were problematic. I am curious if it’s possible that I can put a newer emission system on these trucks so i can have the reliability of the newer emissions trucks?

Thank you