2007 Kia Optima
Out: MS5K 5w-20, OEM Filter - 3300 miles
In: Napa Syn 0w-20, OEM Filter
I did the 3M Fuel System tune-up kit last weekend, and I just finished the tank of gas with the fuel additive this weekend. The oil got quite dark. I know color is not an indication of oil condition, but I just wanted everything to be fresh and clean. I also want to do as little maintenance as possible during the winter months.
Cheers!