It's a leaking lifter......oil is clean full-no sludge and high grade LubroMoly. I know a few seconds does not sound like much but I've owned BMW's for 25 years and never had one do that. I also never had the problems this X5 has given me.

The engine only has like 78,000 miles.

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2002 X5 4.4i Sport Wheels
2014 X5 35i M Appearance & suspension package
1995 Porsche 993
1972 Porsche 914-6
2020 GLE 450 Twin Turbo
2019 Alfa Stelvio 500hp Quadrifogilo
Many motorcycles