I’d find something in a 10W40 or if you’re really into emptying your pockets, you can use a 5W40 100% synthetic and it can’t be a cheap oil. When the spread between the winter grade and the 212*F grade is that big, the additive package and even the base oil (which is the Winter grade and the additive package makes up the high side) has to be very good (and that ain’t cheap) or the oil will have a short life, and it won’t take long before it’s job.
In fact, a very good 5W30 would work for you, but again, that ain’t cheap.
The Driven oils are damn good for their price point. I can’t remember what it is, but I think 7 or 8 bucks a quart so it’s not outrageous.
Since I run a 5W30 and I’m dropping down to a 0W20, the oil I use is double damn expensive. I think it’s 22 bucks a quart.
That’s a lot, but I’m going WAY down in grade, plus I’m running a pretty aggressive solid flat tappet lobe, so I don’t mind paying it.
The Driven should be more inline with what you need, but not a 20 winter grade and not a 50 grade, unless you’re clearances are outrageously loose. Like .003 or more.