Nitrogen versus air: modest physics, oversold promises
What nitrogen is not is a substitute for checking pressures. Underinflation remains the single biggest cause of highway blowouts in the Gulf: a soft tyre flexes more, flexing generates heat, and heat is what kills tyres here. That mechanism operates identically whatever gas is inside. The compliance-minded routine is a monthly pressure check against the door-jamb placard, done cold, plus a visual walk-around for bulges and embedded objects before any long highway run. If a vendor offers nitrogen as an inexpensive add-on at fitting time, it is reasonable value; if it is being sold as a safety system that replaces maintenance, it is being oversold.
One caution: mixed fills are harmless but pointless. Topping up a nitrogen fill with ordinary air at a petrol station does no damage whatsoever, and the widespread belief that it does keeps drivers running underinflated while they hunt for a nitrogen point. Correct pressure with plain air always beats low pressure while waiting for the right gas.