87 or 89 octane?

[Arsenalslr95]

What do you guys put in your 3.7? My car is 5 days old, not sure what gas the dealer put in it but by the time I went 40 miles 1/4 tank was gone. After getting down to a half tank I topped it off with 87 yesterday morning, have only gone about another 40 miles and the needle shows 1/4 tank missing, display states im averaging 17.4mpg city / hwy combined (prolly 70/30 city/hwy)

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[bluebeastsrt]

I put 87 in my 3.7! It's rated at full power with 87. Im not sure if it even has timing maps for 93.

 

[Zeenobit]

I use 87 too. The manual suggests 87. No reason why you should pay more.

 

[kodypiccirilli]

87, with the occasional 93

 

[Joe_Stang]

I always use 93 even before I was tuned for it. I give my car the best lol and the few dollars extra it costs is irrelevant to me.

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