well when it happened to me once i never forget it..my last car blew a head gasket on a trip and ever since then i am always on alert on hot days...that is why i guess i can stay awake the whole trip and never get tired..plus there was a 08 merk 350 on my *** and i was watching him when it happened.. it has 12 thousand miles and i have done 6 long trips and it has only done it twice..it better not be a gasket...i will leave it and shoot the thing with my 50 cal..and walk away and never buy chrysler again..i have lived by them all the way and i would hate to be another jap buyer.