Highly recommend it. It’s a direct injected engine, so it will help big time with carbon buildup on the backside of the valves, which will kill mpg and performance over time and requires expensive walnut blasting every once in a while to clean the valves.Talking about this subject. My GT is like yours, but mine has 9K miles. Do you recommend using a catch can on the GT? I've been debating if I should install one. I feel like mine has lost some power. Would the lack of a catch can affect its performance? I live on a small island, so humidity is all year long.
Based on your picture, how long did it take to accumulate that much oil?