Thread: Premium Fuel?
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Old 02-22-2013, 01:23 PM   #1
06mistreSS
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Join Date: Dec 2012
Location: SE Michigan
Age: 32
Posts: 163
Default Premium Fuel?

I've seen others with the ECO version running premium and getting significantly improved fuel economy. That said, I was curious about trying either midgrade or premium to see if it improved fuel economy in the 1.4L Ecotec Turbo. The manual states to "use regular unleaded gasoline with a posted octane rating of 87 or higher". It does mention running higher if there is knocking, which is not my case; I'm interested purely for any gains in fuel economy. It does not mention anything about not running a higher octane, so is there any reason I shouldn't?

Anybody have experience with running a higher octane in the 1.4L and, if so, what were the improvements, if any?
*I run premium (93 octane) in my Monte Carlo but it's recommended for the LS4 V8; stated in the manual.
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