I'm neither for or against catch cans, but I'm at 102,000 on my 2016 EB Expy without a catch can and no issues to speak of. The truck runs great. I've change the plugs twice, both times the old plugs were clean. I use full synthetic oil, do changes every 5k miles, and only use "top tier" fuels, none of my trips are short, every time it's driven it is brought up to operating temp, and though most of my driving is sedate, I do run it out to red line in 2nd gear once in a while when getting onto the highway to "blow out the cobwebs".