Sat had an oil change, tires rotated (had purchased new set from you in Mar 2013) Thurs am called your store to say car displaying low tire pressure!! Got car in immediately to check and all 4 tires were 8-10 psi low!! Were they checked when they were rotated or could the cold weather have effected the pressure that much in 5 days? Anyway, problem was fixed promptly! Thanks!