More or less. You will lose some quality but on a texture or pattern like leather it may not be too noticable. I'd try to tile it if I could, going from 13x15 to 80x240 will produce alot of horizontal distortion. You may also try enlarging it proportionately to 240" wide and then cropping it back down to 80" tall to avoid distortion. If the pixelation or distortion is too noticable you'd probably need to use a program like Genuine Fractals to enlarge it cleanly.