New Truck - X15 Advice

[the missing link]

Food for thought .
And I am sure uni will back me up.
I live in a far ,far away land where the eskimos, wild unilievers, wild hammeheads inhabit the land .
It aslo can get a little cold ,as in your piss freezes before it hits the ground .

The point is myself ,including others ALL run 15-40 year round so don't think you need lighter oil for colder weather .
I could be , probably wrong , but hey it's my 40,000$ dollar timex.