I've been using it in my 98 Toyota Tacoma V6 and 01 Corolla 4cyl for about 2 years now. Have been going about 10,000 miles on average between changes with no issues and have read of people going 16,000. It is a premium heavy duty oil intended primarily for diesel engine use but has a gas rating also. It isn't stamped with the "Energy Conserving" designation like most passenger car only products which is only a phosphorus content difference I think. It states that it will provide fuel economy, which I can't verify and is designed for extended drain intervals, which is what I wanted. I don't see any problem with using it at 1500 miles.