I also have a 2wd PF. I purchased the Airlift1000 for the 4wd Pathfinder. I thought the 2wd and 4wd PFs used the same suspension and coils. I didn't put grease on mine. Here they are after 3.5 years and 70,000 miles. Never had any leaks. Airlift makes a great product!
5-7lbs of pressure in the bag ...