RE: 100 degree heat and lean engines
Ok, taking another look at a map, I realize now that Amarillo is not farther north than most of OK, just farther north than some of OK. Amarillo and OKC are both on I-40 (old route 66) which goes east-west.
Perryton TX is only 47 miles away from Liberal KS. This town is definately more north than most of OK.