Not always the case. I’ve seen drastic differences in some regions from customers using Costco fuel.
When I have time I’ll dig up some logs and show you 👍
10-4
The advantage that comes from having tuned thousands of Hondas world wide for over the last 20 years includes knowing the quality of fuel in each state/region. 😉
For example, 93 octane in Florida isn’t the same as 93 octane in NY or TX.
Happy tuning!
Thanks for taking the time to post your results.
Do you happen to have datalogs for each dyno run?
Was curious to review logs if you have them as it looks like you may have not driven the vehicle long enough to allow the cam timing to come online when testing the Phearable tune.
Also...
Both 91 and 93 octane versions of the 11th gen civic si Stage 1.5R are available.
If you wanted to use 91 octane with ethanol added to achieve 93 octane, you could as long as you stay at or under e15 without adverse effects.