Originally Posted by CoupesCuts
This is the problem I'm running into. I was using Quaker State SAE 30 and by 50hrs it was black. I could never make it to the 100hr interval. So I decided since I like the Opti-2 so much, I'd try the Opti-4. It's not synthetic like most people think. Even after using that (which is way expensive) I couldn't make it past the 50hr mark. This is why I started this thread so I could find out what is working for you guys out there. Am I going to get 100hrs out of a synthetic? Or should I just go back to my Quaker State and change it often. Which is better? Or is there another option?
I've noticed how Quaker State changes color quickly but you can't always go by color.