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Discussion Starter #1
New owner of a 2013 3.8 RSpec. Just wondering what you guys fuel up with, and whether there's you've seen any noticeable difference between regular and premium. Thanks.
 

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I use premium but I have a tune. If it were me on a stock motor I would use reg at least during the winter. Save the premium for when it's hot out or for when you want all the performance you can get.
 

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What about if you first buy the car..

Should you fill up with regular or Premium or does it not matter really?
 

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I read a report - Car and Driver? - that said the difference is 6 hp, i.e., 344 with regular and 350 with premium.

Good advice about the summer and premium. I used to do that with a finicky motorcycle that liked to ping when it became hot out. Worked like a charm.
 

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I guess if you drive a Genesis, you don't care about the money too much. But for me the extra money is totally not worth it.
 
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