KBB.com 10 Most Comfortable Cars Under $30,000. Only 17,213 Miles! Delivers 39 Highway MPG and 28 City MPG! Carfax One-Owner Vehicle. This Nissan Altima boasts a Regular Unleaded I-4 2.5 L/152 engine powering this Variable transmission. GUN METALLIC, CHARCOAL, CLOTH SEAT TRIM, [L92] FLOOR MATS & TRUNK MAT.*This Nissan Altima Comes Equipped with These Options *[B10] BODY-COLORED SPLASH GUARDS, W...