I saw one thread discussing RON (Researched Octane Number). I checked the RON manual and it stats that for our VVTi Fortuner (2TR-FE), the minimum RON is 91. Does this mean we can use unleaded gasoline for our VVTi ride? For Shell Unleaded, it has a minimum Octane rating of 93. I read from that thread that using higher Octane rating has no noticeable benefit for our engines. Unless you believe in what the gas companies say that, like for V-Power of Shell, it cleans your engine better than the regular octane gas.

Considering the prices of gasoline is skyrocketing, I am thinking of downgrading my gas from V-Power to just unleaded as long as this is acceptable and does not damage my engine.

Any comments from the experts there? Thanks.