The 10% going bad shouldn't corrupt the entire batch of gas. However it may run funny till you fill it up again.
Sent from the road while ignoring traffic
Sent from the road while ignoring traffic
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I'd make sure the anti-freeze is good to at least -50...put some moth balls in a box in the truck to deter mice from having sex in your G-Love box...the oil should be as thin as you can run in it (eg 5W30)...and check that the windshield washer is also good for -50...
-35 is good enough down here for the coolant, it rarely gets half that far below 0 overnight.
Washer stuff is hard to find much lower than -20.