While taking a defensive driver course for work recently I learned the "recommended" way to adjust your mirrors is, " To adjust your mirrors properly, put your head against the left side door glass, then adjust your left mirror OUT until you just barely can (or barely can not) see the side of your car. THEN, move your head to the center of your car and adjust your right mirror out until you can barely (or barely can not) see the side of your car. The goal is to set it up so that once a car leaves your REAR view mirror, it appears in your SIDE view mirror - and once it leaves your SIDE view mirror, it appears in your side window/peripheral vision. Unfortunately, some American cars don't let you adjust the mirrors out far enough to completely accomplish this." After many years of driving I don't think I could adjust to this "proper" setting. I adjust mine in my car or truck the same way indianrefining does & I'll continue to do so. Cliff