That car is designed to use the regular leaded gasoline not the premium gas.
What color is premium gas
Check your user's manual. Many people mistakenly use "premium gas" because they think it is better in some way. The labels "regular" and "premium" have to do with the anti-knock characteristics of the fuel.
Premium is required
It is always okay to switch between regular and premium gasoline. With that said, it depends highly on the make of your engine whether or not your car will actually benefit at all from the use of premium gasoline. Make sure to look in your car's manual before you switch to see if your car can benefit for from the switch.
I used regular gas in my 2009 Murano. Ocassionally, I use the premium when I have extra cash.
you can use regular or premium
higher OCTANE!
The Kia Sedona requires 87 or higher octane fuel. In the US, "regular" gas is 87 octane, middle grade is 89, and premium is 91-92. For this car, you only need regular grade gas. You *can* use premium, but it is not at all necessary.
It is highly recommended that you DO NOT use regular gas in ANY Mercedes. They were all built to run on premium and you can cause serious damage to your engine if you don't. In fact, I've been told that the "premium" fuel in the US is garbage compared the the premium fuel in Germany. So, don't use regular if you like your car.
i am guessing you should use premium gas for a Chrysler 300. Regular is ok unless you have a SRT8.
The right type of fuel will keep a car running its best. The Audi can take premium, special or regular unleaded gas.