TwinTurbo.NET: Nissan 300ZX forum - Yup, pump gas degrades quite a bit when stored.
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Subject Yup, pump gas degrades quite a bit when stored.
     
Posted by dogpile on December 15, 2016 at 2:50 PM
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In Reply To I find premium degrades over winter storage. posted by vorpalZ on December 15, 2016 at 11:21 AM
     
Message We typically see a ton of knock when we tune a car that's been sitting for a few months with pump gas. We usually just pump it out and put in fresh gas before we start tuning at this point.

E85 though, we've had cars sitting for years with it in the tank and they get right up and go no problems whatsoever.

     
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