You could stop by the local parts store and pay about $2.30 for the extra quart. Go by the dipstick and not the manual. My V6 Escape took what the manual stated but the I4 manual says 4.5 quarts but I've never got much more than 4 quarts in a fill. My local Walmarts carry MC only in quarts but at $1.78. No FL-820s (V6) or FL-910 (2.3 I4) but I order my Wix filters online for a decent price.