running 87. Toyota's dont like anything fancy as in there is zero difference between 87 and 91, i'm not running a performance or luxury car, the extra microscopic efficiency difference is not worth the extra price at all when they both are the same. I get at best miles more with 91 for a full tank of gas. We californians are fked up the @ss with gas prices so it makes zero sense to get anything higher. Its the weight more than anything in my setup thats why i even mentioned it. Its funny how i still get better gas mileage than chevys, fords, and other gm large to midsized SUVs.