Buick Regal Forum : 2011 Buick Regal Forums - View Single Post - CXL 2.0 Turbo Spark Knock
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post #17 of (permalink) Old 09-19-2012, 04:40 PM
Harshman
Junior Member
 
Join Date: Apr 2012
Location: Ohio
Posts: 20
Never had the knock issue. Started running the higher octane and have gotten better pick-up and gas mileage. Gained about 1.5 or mpg over the 87 octane.
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