while getting oil change at acura,the mgr wanted to align my rear tires.

it's actually a normal "wear and tear" kinda thing with all cars. what he wants to do is basically re-align the tires so they roll straight. if the tires are pitched too far in or out either side to side or top to bottom it will cause the tires to wear abnormally. it would be wise to get the vehicle aligned. it will ensure you get the full life out of your tires.