I finally stopped guessing at tire pressure after a guy at Discount Tire called me out
I was airing up at a Sheetz in Columbus last month and a tech walked over and asked why I was going by the door sticker when my tires were 6 psi over what they should have been for the load I had. Turns out I had been running them too soft for hauling gear and wearing the outer edges for almost 2 months. What is the goofiest maintenance thing someone caught you doing wrong?