GM offers a 160,000 km power train warranty on that car using their 5w30 dexos.
Typically in Canada, we might see an ATS-V stuck in traffic, in one of perhaps 8 cities over 1M.
Five years on a country mountain road, except during snow storms, might be enough time to break things a few times over.
And why keep the car on the pavement if there is a shorter route by logging road?
I was serious about the studded tires, but not the body lift.
My 04 C240 Benz made a great back woods car, and had powder burns on the sunroof to prove it. The ATS-V would add excitement to the trip.
The DTM reference? Well, in track form they kinda look like one, and might actually beat one.
Near as I could tell, the factory boost is 18 lbs. I'm sure by now there must be exhaust kits and so on, if it's possible to put more than factory power to the ground.
My thinking for an engine oil is a high density XW-3.7 HTHS.