My 91 300SE has 116K miles on it. I'm female, I don't know a whole lot about cars, but I can change my oil and air filter, fuses, minor type things. I want to be a little independent when it comes to my cars. For my oil changes, I went to Kragen about 3 years ago, and they have me using Max Life 5W 30 Synthetic Blend, which I have not had any issues with. I found an old oil container in my trunk and it seems like I previously used 20W 50, which I believe it what the manual says to use. I could not find a section on this forum for oil info. Do any of you DIY guys have any preferences on what you use for oil? In my 93 Miata I'm using Max Life 10W 30 Synthetic Blend. That car has about 170K miles on it. No issues with that car either. Any advice would be appreciated!!