See also:

Owning
The Kia's length, width and stretched wheelbase provide excellent legroom in the rear. The boot is also generous, with a 420-litre luggage capacity. In the front, though, the cabin doesn't give yo ...

Rear differential (4WD)
Checking or changing rear differential fluid Have rear differential fluid checked or changed by an Authorized Kia Dealer according to the Maintenance Schedule at the beginning of this section. ...

Roomy New Interior
However, the Optima's quiet new interior is more upscale and will accommodate four tall adults, or five in a pinch. Front seats are supportive, and the rear-seat area is impressively roomy—alt ...