So, I just got the Dinan sport and have been using it in sport+ mode. To try race mode, I need at least 93 octane fuel and can only buy 92 in my area.
Does anyone have a recommendation for an octane booster product? I have looked at several reviews and it looks like there are lots of options.

 

I've had a lot of success with -- a whole container per refill. You can get a case of 12 from Amazon for ~$80 per. It's far less expensive than high-octane race gas, which is often also more difficult to find (and I have had to make a drive to the track to get it in my area, not exactly convenient). You'll need some kind of skinny funnel to help you aim your pour, but those are easily found in an automotive store.

Only caveat: this will turn your spark plugs orange. Doesn't harm them, but it's good to have them soaked in some either some Sea Foam, alcohol, brake cleaner/carb cleaner, etc. Good luck!

 

A long term fix would be to add Water/Meth injection. 👍

 

You could mix 92 and e85 and get that octane up as well. 2 gallons of e85 then fill the rest of the way up 92, should be well over 93 octane.