Hello, I changed my oil last November 2016, and the car sat until Spring. I only got to drive it 400 miles this year, and now it's time to mothball the car. I bought gas Jan 2017, June 2017, and just filled up Dec 1, with Shell V Power, and Sta-Bil, in preparation for Winter. Car is a GT500, and I used Ford's synthetic oil. I do not plan on driving the car until April, so the big question is, do I need to change the oil? My thinking is change it in the Spring, so it's ready for next year, versus changing it now, when I won't be using the car. I know some oil companies recommend changing it every year, if the mileage limitation is not reached, but 400 miles seems like I'll be wasting fresh oil here. Opinions? Thanks!