2003 Honda S2000, 9000 RPM redline, it sees 7 or 8000 RPMs every so often, 4 and 5000 regularly. 80,000 miles, Valvoline Conventional 10w30 and mobil 1 filter. Wifes car, but when my son or I drive it, we work it. 1987 Ram 318, 4x4, 4 speed work truck, start and stop all day in Memphis heat and humidity. Any 10w30 and filter I have is what it gets. Also, 1959 Chevy Apache 283, 300 HP, Muncie 4 speed, driven hard, 3 or 4 days a wk. I have been reading here for a while so I thought I would join and ask for your recommendations. Thanks a lot for any advice on oil and filter. Travis. Great site.