I bought a used 2009 Lexus RX350 with 7,000 miles on it!! I LOVE it! sadly I was STUPID and decided to buy it from a used car dealer, I thought it would be okay because there was only mercedes, Porsche's, Audi's, Lexus's BMW's, ETC.. I was sadly wrong... This car was a repo car and was bought at an auction from a dealer. the car is perfect and had perfect PREMIUM tires until they replaced them with crappy tires at the auction. So besides buying a $40,000 suv now i have to go out and get close to $1,000 on tires. Please let me know what type of tires you have for your rx 350!! do i need premium tires.. i heard they make the car ride really smooth, but the car is already a dream to drive. I also heard that they make the gas mileage worse by almost 2-3 gallons!! THANKS