Is there any technical reason for idling a diesel in summer?

Mid-June,big diesel pickup truck at 8 in the morning and idling in the parking lot while owner is shopping..

Holding my nose to not get a sinus headache. Enough of it and I will.

I don’t know the complexities of how those work but I’m somewhat okay with what I would call a stock diesel fume.

This was more like mis-adjusted carnival ride stink.

Guess they love it.

In other news, free diesel pickup, have Uber drop you off at the store about 8am and then rapidly keep out of accurate firing distance during whatever you’re doing that I didn’t recommend. What’s a Jalopnik, officer, is that a Russian import?

J/K, we don’t have Uber around here.

PROBABLY HAS LOJAK