Thread: Premium Fuel?
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Old 02-23-2013, 12:18 PM   #4
06mistreSS
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Join Date: Dec 2012
Location: SE Michigan
Age: 32
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Another thing to add.

Switching from running regular to premium in the Monte Carlo didn't show any noticeable gains in fuel economy, although I'm running a high performance air intake and exhaust system in that car so the engine is pulling in and exhausting more air. More air means the system wants to throw more gas into the engine to keep the air/fuel ratio the same. Although no gains in economy, the premium did slightly increase performance.
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