In January 2008, Consumer Reports (CR) tested the claim that filling tyres with nitrogen instead of air is supposed to keep them fuller longer. (Tyres that are correctly inflated give the optimum fuel economy and tire wear and are more durable.) In the US, some tyre retailers and car dealers offer a free nitrogen-inflation service; others typically charge about $5 to $20 per tyre. It seems to be around Rs. 40-80/tyre here.
CR took 31 pairs of passenger-car tyres and filled one of each pair with air and the other with nitrogen, setting inflation pressure at 30 pounds per square inch (psi) at room temperature. It set the tyres outdoors for one year, then rechecked pressure at room temperature.
CR found that the claim isn't totally hot air. All of the tyres lost pressure, but nitrogen-filled tyres lost less: an average of 2.2 psi, vs. 3.5 psi for airfilled tires. However, with either filling, one has to check tyre inflation monthly, which means that paying for nitrogen doesn't make much sense.
__________________
For one who sees Me in all beings and sees all beings in Me, I am never lost, nor is he ever lost to Me. |