Manufacturers must make cars now that will run on almost anything without being harmed even if they won't admit it. With modern engines and the computers that run them, this is not difficult.
The lower lines advertise good economy and recommend Regular.
The higher lines advertise better power and recommend Premium.
ALL will run just fine on either gas.
Knowing this, my wife will probably get the V6 and burn Regular.
My cars will get Premium (like a dummy) because I need that extra power 3 times a year, and it's probably not going to be discernable then.
The lower lines advertise good economy and recommend Regular.
The higher lines advertise better power and recommend Premium.
ALL will run just fine on either gas.
Knowing this, my wife will probably get the V6 and burn Regular.
My cars will get Premium (like a dummy) because I need that extra power 3 times a year, and it's probably not going to be discernable then.