I would have to do some mathematics to compare 85 to 87 vs 91 or 93... Some places have that 93
So I tried 93 once in Wisconsin just to see how it go... I wasn't impressed!
The truck likely only needs 87 octane. Anything more is just making your wallet empty. Octane is a measure of the fuel's resistance to pre-detonation or ping. This is a problem for high compression, high performance engines. The engines in the Tacomas are not considered high compression nor high performance. Check your Owner's Manual to find the recommended fuel octane.
Simple way to compare using math, so it isn't too hard.
Multiply the price per gallon of 87 octane (whatever blend you use, E10, E0, E15) times 33 gallons. Save that number (A)
Multiply the price per gallon of 92 octane times 33 gallons. Save that number. (B)
Subtract A from B to yield C, (B-A=C)
If C is greater than $1, then you should only purchase 87 octane to save the most $$$
Otherwise, you're stepping over dollars to pick up pennies.
I tried a couple tanks of E15 fuel. Fuel mileage took a big hit. Sure, the truck burned E15 without issue, but it also drank it like a 5 yo with grape soda. My fuel mileage dropped nearly 20%. The E15 was cheaper per gallon than the E10 (my normal fuel), but the mileage penalty made the E15 a more expensive choice. The E15 was not 20% less expensive per gallon.
This day with inflation you need to manage every $$$ to make wise choices to minimize your spend. Even though it may involve some simple math.