Vx is running hot in stop and go traffic in upper 90s+ temps, but seems to be fine on the highway and in the mornings. Going to replace the fan clutch as that seems to be a common thing to go from my forum searches. Mechanic noted 30 degree temperature differential across the radiator top to bottom and mentioned that there could be mineral deposits or other in the radiator limiting it's efficiency too. He mentioned that I may want to consider replacing the radiator as well. I have 50k miles on the Vx. Your thoughts?