Should I use higher octane with a vtec?

I have an 06 Honda Civic with a vtec engine. When I first got it, the way it drove made me wonder if it had a performance chip, but I've only been using 87 octane it and I've noticed a drop in the performance since I got it. So i don't know if it actually has a chip in it or if I should be using higher octane

Read more: https://hondanews.net/civic/should-i-use-higher-octane-with-a-vtec.html

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