95 SL500 What Octain Fuel must we run?

[Red5]

First Benz here. And I LOVE IT! I just bought this car for my wife. A nice Christmas present. I asked her what her favorite car inthe world would be to own, and without but a few seconds she responded a Mercedes Benz SL500. It simply is her favorite.

So I did a lot of research, thanks guys I read a lot of your posts, and found a 1 owner car with 50k in perfect condition.

What I didn't expect was the awsome level of performance this thing offers. The trip home was a real eye opener for me.

All Spring, Summer and Fall I race two C5 Corvettes in SM-II. That is basically an unlimited Modification class. it's safe to say that I'm used to some serious power.

But I didn't think that this car I bought for my wife would hit nearly as hard as it does. Nice smooth delivery of torque. Shifts wonderfully well. Doesn't break loose like the Vettes. Just a good car.


Now back to my question:

This is her car. i'll only be driving when we use it to go on trips and such. She drives slow. Like very conservative. The car will never have the go pedal passed the 60% level.

With that said what octain fuel will she need to run?