I have used NEO Oil full synthetic in my BMWs and other vehicles for 35 years since the 80s. I prefer Hastings Filters but have used Mann changing them about halfway point. My oil intervals are about 20,000 miles/two-three years with excellent results. Have gone to 25,000 occasionally. No engine breakdowns or oil leaks in my current 2001 Suzuki or 2007 X3.