Now my only concern is what gas to use in this new Toyota? The manual is a bit open ended, and say's to use a minimum of 87 Octane, (or 91 Research Octane), or higher. I'm wondering if this will be enough in the hot Arizona Summer months, when knocking can easily occur when the engine is placed under a load, like climbing uphill or accelerating on to a freeway.
My 1991 F-150, (5.0 V-8) knocks like crazy unless I use 91 Octane Premium in it. (The manual say's it should run on 87 Octane). My 2015 Jeep Grand Cherokee 5.7 HEMI V-8 say's to use 89 Octane ("Mid Grade"). But I also use 91 Octane Premium in it as well. It performs much better, and never knocks. Also, 89 Octane "Mid Grade" isn't always available in every station. Especially if you get out of the city.
The engine compression ratio in this new Camry 4-cylinder is listed at 13 to 1, which is very high. The car was delivered with a full tank. I have no idea what type of fuel they put in it. It doesn't knock, but admittingly I'm babying it until it's gets at least a few hundred miles on it, and gets somewhat broken in. So it's not going to knock under relaxed driving conditions in the mild temperatures we're experiencing now. (50's to 70's).
Also, the computer in these modern vehicles is capable of constantly adjusting the timing while driving, to adapt to any fuel without knocking or engine damage. But they can only detune the engine just so much to compensate.
This thing gets such good fuel economy, (I'm averaging almost 40 MPG driving around town with it), I'm tempted to just run 91 Octane Premium in it and be done with it. I don't like the open ended "recommendation" of 87 Octane.... "Or Higher". I'm tempted to use "higher" with a 13 to 1 compression engine. And not worry about the few extra cents a gallon it costs. I'll save money elsewhere.