90 miles after taking delivery of a used 2014 Passat TDI SEL with 101k miles, I get a STOP ENGINE low oil pressure light. Got it home and hooked up a oil pressure gauge to it. At hot idle I'm reading as low as 7 to 8 psi that sometimes reaches 10psi. At 2000rpm Im seeing mid 20s psi. My AllData service info indicates these readings meet the minimum of 8psi at hot idle and 15 psi at 2000rpm. But a search of these forums indicate normal psi's as high as 60. As I bought this car to commute 750 miles, one way, to work every week Im concerned about this. Could this be a oil filter improperly installed, sludge buildup (oil cap is clean), diluted oil, wrong weight oil (sticker indicates 0W40 change 2 months ago), or the usual suspects of bearings? Is the turbo at risk running 20psi at interstate speeds?