For my mustang which sits alot and when it does get driven I like to drive it hard . I like mobil 1 10w30 synthetic , been using it since 3000 miles after I broke the engine in ,when I pulled the heads to change the head gaskets it was the cleanest engine inside I have seen . engine has about 30000 miles on it ,I change it once a year . i only drive it about 3000 miles a year . Now for the daily drivers a 2002 escape and a 1999 jeep wrangler I use motorcraft synthetic blend oil , works really good the Motorcraft is top notch , if its good enough for ford to warranty on a new car its good enough for my cars , the jeep has 212,000 miles. on it and the escape has 156,000 miles on it.