I changed all 4 of my tires to brand new ones in 2012. I only drive about 5K miles max. My mileage today is around 47K. My tires are fine but I keep losing air almost every 3 weeks. Has been happening for almost a year now. I have it checked and repaired at least 3 times at MIDAS, fire stone and at a local auto repair shop recently. They called it RIM, Valve etc problems. When I go back after I see the warning light, they say it is due to cold weather. What the heck should I do now? Is it due to bad tire or something about the car engine ? I can’t afford new car so I will try to fix it once and for all. Thanks for any suggestions . My tires looks normal and no mechanic shops have told me I need new tires.

finally after more then 14 months of air leak issues , I finally drove to Costco to order 4 new Michelin tires that were out of stock on Costco website. I had to fill up air before getting there . No amount of fixes or trips to auto mechanic shops are able to fix the issue. So I decided to just get new tires . In last 7 days, I went to fill up air 3 times as it is brutally cold here . Now I will know the endless air leak is due to tire or struts or something else. Costco told me I will know if they will get the Michelin premier AS tires in about a week.