3rd Generation Optima (2011 - 2015)
Realize this is the 3G forum, but as I post here with the '11 EX-T, but when replacing the VC gasket and plugs thought I'd take a picture. Actually couldn't believe the engine was so clean, no buildup at all.
Purchased new, oil changes every 7,500 miles with any Dino oil that was on sale (5w-20)...