New guy here. I just registered after reading this forum for about a month now. Great topics and informed people. I have been using Mobil 1 10W30 in my 1990 Mazda Miata since I bought the car in 1992. It had 27,000 miles on it when I bought it. The previous owner had used regular 10W30 Pennzoil. My question is, should I change to a heavier oil with the kind of mileage I have? 215,000 miles at this point. I am thinking about using Mobil 1 15W50 or 0W40. Which would be best? Currently, I seem to burn about half a quart of oil each 3,000 miles. I change my oil every 5,000 miles. I'd appreciate your comments and advice about the possible advantages of a heavier oil.
[ March 14, 2003, 05:03 PM: Message edited by: MiataDon ]
[ March 14, 2003, 05:03 PM: Message edited by: MiataDon ]