My neighbor just bought an '06 Chevy Malibu with the 3500 V6. It has 24,000 miles on it and she wants me to do the oil changes on it. She commutes 25 miles each way to and from work. Any suggestions? I was going to use Pennzoil Platinum 5w30 and a Pure One filter and change them both every 6-7k miles. Sound okay?