Maintenance Questions

[jp99]

2001 X5 4.4i, 8 cylinder, 33k miles --- I don't put a lot of miles on it --- off warranty now and have decided to do as much myself as I can and avoid the high dealer charges.

1. Engine air filter element is an Inspection 2 item - has never been replaced as far as I can tell. Any idea what the expected mileage is when this filter is typically replaced?

2. Can't find any references to any traditional lube requirements. Correct to assume that a 'lube' is history and all critical joints and linkages are sealed and permanently lubed?

Thanks - great info on this forum for DIY.