As far as the filter goes I need to check and see if the company is still in business so I can buy replacement filters. But yeah, at the very least it should help protect the engine.
Thanks for the replies on tire pressure--I feel more comfortable bumping it up a bit. My tires have a C load rating and my vehicle weighs 3700 pounds with me in it. Based off of that I suppose I could drive around at 50 psi and still be fine. I'll need new tires soon anyway so I'll see if 40 psi causes any abnormal wear.
I currently run around 34 psi, so 40 psi should make some sort of difference.
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