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87 octane fuel

martym

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Jan 17, 2021
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2020 6.2. Have owned for 5 months and 11k miles. Great truck. Have never put anything but premium fuel in it until last weekend. Decided to try a tank of regular. Pretty much drive the same route every week. As far as performance it might not of felt quite as quick. (might) hard to say. Surprisingly the mpg went up 1.1 mpg. Wasn't expecting that.
 

beezer1519

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Just beware if it starts knocking. That’s the issue with high compression engines and why they need premium. Don’t know what your price difference is on fuel but at Costco here in Cali I’ll pay the extra 6 bucks a tank to ensure I don’t have future issues.
 

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