I find that my tires stay within 2 psi over the course of a year. Not sure why people need to inflate so often. Maybe it helps that I inflate the tires in the winter when it's coldest, and the warming weather offsets the minor loss of air.
I'd probably inflate by hand if I had a hand pump, but I've always had access to a compressor that has a dedicated space and is always plugged in.
It's illegal for CA to require service stations to provide air and water for free. No idea how they enforce that without getting sued.
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