I'm not a fan of dump-in-the-tank fuel injector cleaners and octane boosters. I’m not saying that they’re bad and not to use them. I suppose they work to some degree, but not as well as my professional setup does. Am I saying you need an expensive professional fuel injection cleaning system to get the job done? No, but it's the best method I've found so far.
As for octane boosters, I really don't see the point. The RM2 octane rating is a rating of resistance to burning. The higher the octane, the less the fuel wants to burn. You only need high-octane fuel with high compression or forced induction engines. Some people swear by octane boosters and running high octane fuel, if that’s you, more power to you (pun intended). For daily drivers, all you need is regular octane and your engine should run just fine, in some cases even better. Here's a video with some details on that.