If most of your miles are highway you should not need to change your oil every three thousand miles. However, those oil life monitors are reputed to be pretty accurate (they use an algorithm to calculate oil life based on driving habits, conditions, temp, etc.) so I'm a little surprised you're already at just 30% after less than 3,000 highway miles. Was it reset after your last change?
I used to be a religious 3,000 mile changer but I weened myself off of that. On the last change in our van I went 6,000 and sent a sample to Black Stone Labs (
Blackstone Labs) and found I could easily have gone longer, the oil was still in good shape with some additive left. They will send you a free test kit and the test itself costs about $30. May seem like overkill but you will pay for that in one or two oil changes if you find you can go longer between changes. Polaris is also supposed to be a good lab but I've never used them.
I bought a new car last year and I'm weening my way again up to the recommended 7500 miles. I'm at 6k right now , next change I will do 7k, then 7.5k and then send a sample in. I will probably be able to go longer but I'll keep it at 7.5k while I'm under warranty.