The heat might have had a little to do with it, but the majority was the crap they throw on the roads up there (no stranger to it - spent most of my life in NY). My dipstick tube is right next to my turbo manifold and I've never had an issue.
6.0 LQ4 - 80mm TURBO - PRC DUAL SPRINGS - COMP LIFTERS & PUSH RODS - LINGENFELTER GT2-3 2CAM - 60# INJECTORS - ASP U.D. PULLEY - FLT LEVEL 5 4L65e - P.I. 3200 CONVERTER - DETROIT TRUE TRAC & 3.42 GEARS - WALBRO 255LPH FUEL PUMP - 05 E-FANS - TUNED BY L.G