I have always used premium since purchase in '08 ... the guy at the gas station says it does not make a difference; I could use the cheaper form of gas.

 

Has anyone done this? I would be interested in knowing ... the car has maintained well; don't want to create a problem.  Thanks, Rosalie

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I take all my car advice from the guy working at the gas station for minumum wage......J/K.  Use the premium.  It's only about a buck-fifty more a tank.

Thank you for your prompt reply.  I always have used premium (as it stated in the booklet), but it was as though he were "talking down" to me (as I am female and there are some men who do that).  So I will continue (feeling secure now) to use premium (I do get great gas mileage .. and I have to drive everywhere for everything)

George Oller said:

I take all my car advice from the guy working at the gas station for minumum wage......J/K.  Use the premium.  It's only about a buck-fifty more a tank.

Car enthusiasts have no gender and should be treated as such.  I have always used premium in my other cars and had good service from them.  In my '09 Brabus coupe, I have always used Shell V-Power with good results.  I really hate it when some pump jockey treats a woman as a second class citizen and acts as though he is the all knowing car wizard.  I have known many women that are far more knowlegeable when it comes to car issues than most average men.  Keep enjoying your fine little smart!!

Again,  thank you for your supportive reply. You are a "courtly" gentleman, a rarity in "our times".

Every car is different in what octane gas it needs to perform well.  I own a Subaru Tribeca for example, and using anything except for the lowest octane is a waste of money since it is not a high compression engine, and will not benefit from the higher octane.  

 

OTOH the little smart with its 1l engine is a high compression engine, and if you use lower octane, it will lower the performance of the car, and lower the MPG more than the price difference of regular versus premium gas.

My Volvo S-80 is the same way.  I can use either premium or regular in it, but I notice the performance difference, and the MPG does go down when I use regular.

So use Premium in your smart.  It is what it is designed for.  Do not listen to people who operate gas pumps.  They probably think that the smart is an electric car.

Use premium.  The engine runs better.

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