Can you use regular gas in an Acura TL?

Answer 1

No. In basically every Acura TL over the at least the past 8 years or so, the minimum recommended Octane gas to use according to the Owner's Manuals is 91 or Higher. Yes, regular gas will work, but if you want your TL to work, and work well for a long time then heed the advice in the Owner's Manual.

Putting premium in a 2004 or above Acura TL is not required of the owners manual and will not damage the engine. Yes, it will give you several less horsepower and might not accelerate as fast as MotorTrend tested it, but it will not damage your engine.

I have a 03 tl and recently filled the tank accidentally with regular unleaded fuel. Performance and idle quality suffered, noticed rough idle at traffic lights while idling in drive. unresponsive off idle to about 1500 rpm, replaced with premium on next fill up and within a few miles problem was corrected. That's why it says premium fuel only on gas tank door.