There is a self-check available here:

Those three fuel filters sound similar. Since it starts out running well, I don't think it's an air leak.

do certain engine oils clean engine deposits to a point of those deposits clogging engine components? Are there studies?

Much writing has been done on the subject.

Very valid points. Clear is good, on the one hand. However, if a flush or oil with strong cleaning agents removes carbon debris from an unclean engine, the debris can clog components, resulting in reduced mileage or even engine failure. When you use a powerful cleaner on an unclean engine, it could ...

These are old vehicles that might have a plethora of problems, so I won't say much more. Although it consumes oil, I don't let that bother me; I change it every 3,000 miles. Performance, which LM appears to enhance, is of greater concern. I just replaced a leaking valve cover gasket, and it appears ...

After making the change from Mobil 1 to LM, the engine became much smoother. Because of my own leaks, I am unable to comment on your oil consumption. With these cars, according to my mechanic, a quart every 1,500 miles is about average. Is there any blue smoke visible, either during startup or ...

N51 motor?

The part may be available as a standalone unit or as part of a more costly sub-assembly; I am unsure of the latter. From what I can tell, it's more likely the latter, though aftermarket parts vendors may remove the sensor. I have no idea.Your BMW's engine system relies on the EAC Sensor ...