It's leaded. I'll screw up your O2 sensors because it'll leave deposits on them. Plus, unless you're tuned to take advantage of the extra octane, i.e. have extra timing, boost, and such added, then it's a waste of money to run.
OK sure, but its a waste of money for him to throw it in his tank with a 91 octane tune.It's perfectly ok to run 110 leaded, it takes quite a while for leaded to mess up your o2 sensors and wide bands. I speak from years of experience doing exactly what you asked . It took 2.5 years for my wide bands to start showing signs of issues using 110 c16, q16 every weekend at the track. It's not going to harm anything for a 1/4 tank.
I did this to mine a couple months ago and it still smells of amazing race gas while back on 93.
Isn't that what 15svos car is running?
His car was tuned using race gas concentrate. If you are planning to spend the money, make sure you know what you're buying. You cannot read enough when it comes to your motor. I've replaced a 4v mod motor, trust me, choose wisely.15svos car was tuned for E30 and race gas there is a 30 hp difference between those fuels with e30 he made 350 wheel hp and his 110 Octane tune made close to 380 wheel is why I'm asking this question