hey all, i have a 95 max with 15in nissan alloy rims. the problem is that all four of the rims lose a significant amount of air. the one on the rear left side, loses about 10-14lbs in about 2 weeks. The others are not as bad, about 6-8 lbs every 2 weeks. I live in NYC so my cars been through 10 winters, and i read awhile ago that it mite be a result of salt corrosion. Are there ways to fix it so that i dun lose this much air or are my rims a lost cause?