Recently I realised that when I'm backing up the trailer, while I push the gas from standing position, there's little smoke (not a cloud) comming out of the tailpipe. Also when I cold started, there's smoke, and it's not winter yet. Is my rig just getting old? It has 86K and I've been doing all the required scheduled maintenance. Or is it normal? Check yours.

 

it sounds normal, what color is the smoke? if its black, i wouldnt worrie about anything if you see a little puff from an idle