So while it's OK to change your winter weight, given that your oil will be «cold» relative to operating temperature, it's not advised to use a different operational weight, unless you modify the engine to run a different set of operational parameters, which is
seemingly out of the scope of this query.
Fallout 4 came
out at a time after The Witcher 3, Metal Gear Solid 5, Dragon's Dogma, as well as a plethora
of Ubisoft open world games, and in general games are starting to add a layer
of depth to the massive
scope of a world, something that Bethesda has
seemingly started to lag behind now.