This problem just started in the last week.
2013 MN manual dual cab. 105k on the odometer.
Has Provent 200 catch can, Dyno tune since 2017. Have towed 1.5tonnes before no drama.
Only change recently is did a mid service oil change without changing the filter. Also upsized to 265/75/16 mt’s recently.
Xmas morning I towed my new camper, about 2tonne all up, 2hrs from Melbourne to Bendigo. Wasn’t flogging it. I didn’t notice anything but when I pulled into my folks place, someone noticed I was blowing bit of white smoke as I slowly approached the back of the block. Had driven about 10min at city speeds once leaving highway.
Over next couple days I drove around town and out to a lake 2 times and others in convoy saw no smoke.
Yesterday I towed again 3hrs further north. Can’t notice smoke at highway cruising speed but when I slow down in town and back off the pedal, quite a lot of white smoke pours out of the exhaust for a minute or so.
If I stop and idle, after about 3min, things cool down and the smoke returns to normal idle. No excess smell or smoke visible.
Thought I had over-filled the oil perhaps, but checking this morning its middle of the dip stick min/max holes.
Currently at caravan park in small town for the next few days. Any suggestions on what to check or what the cause could be? Checked with OBD2 reader with no codes reported.