TPMS good or bad?
#16
I'd never pay for nitrogen in my tires, but my last ES350 came with it from the dealer and if they added air during service it was nitrogen. I doubt that there was any mpg improvements with it, but I can say that for the three years I owned the car, I rarely, if ever, had to adjust the air pressures even after severe hot or cold conditions. So it did seem to help maintain the desired tire pressure. Coincidence? I don't know but since it came in the tires and didn't cost extra no complaints here.
#17
Lead Lap
I'd never pay for nitrogen in my tires, but my last ES350 came with it from the dealer and if they added air during service it was nitrogen. I doubt that there was any mpg improvements with it, but I can say that for the three years I owned the car, I rarely, if ever, had to adjust the air pressures even after severe hot or cold conditions. So it did seem to help maintain the desired tire pressure. Coincidence? I don't know but since it came in the tires and didn't cost extra no complaints here.
My 2013 ES came with nitrogen filled tires. It seems that nitrogen does help with the change of seasons. I have not had to adjust the pressure since January 2013. My GS with air needs adjusting with the change from cold to hot outside temperature changes. But as you, I would not pay for it.
As we moved from the summer of 2013 into the winter, there may have been a difference with regard to how much air I had to add as the temperatures dropped, but, if that was the case, it wasn't big enough for me to notice the difference, and I still had to add air a few times as the temperatures progressively dropped. According to what I've read from tire experts, with nitrogen, the amount of pressure increase or decrease with changes in temperatures still runs about 2/3 to 3/4 of what it would be with plain air. And, since plain air is already 80% nitrogen, I'm not sure that I'd expect the nitrogen to make any more difference than that.
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