My car is a 2002 with manual transmission and 98,500 miles on the clock. I've owned it for 8 years and have put about 21,000 miles on it. The car is bone stock. I LOVE THIS CAR!!! Ths car does use oil, a quart about every 1,500 miles. I use Mobil1 10W30 oil. Any suggestions on another oil that will last for more miles?