I'm driving though Utah, Wyoming, and Colorado this week and noticed that the "regular unleaded" gas is 85 octanes. "Mid-grade" is 88 octane. .
In the west coast states, "regular unleaded" is 87 octane. I double checked the Tundra manual and it requires 87 octane gas.
For all of you in the above mentioned states, do you fill your Tundra up with "mid-grade unleaded"?