Hello mga taga-Tsikot!

My ride is a Jazz 1.5V AT, rated at 91 RON minimum.

Just a question: With the unscrupulous practice of diluting gasoline variants used by gas stations nowadays, is it safe to gas up at the minimum RON prescribed? Or must we use the next higher octane rating to be safe?

Something I've been pondering for sometime.

TIA for those who will respond.