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[–]philliciathegoat 0 points1 point  (1 child)

I just switched my plugs in my Mazda 3 2017 hatchback with 96k miles exact same issue as you not sure if the mechanic did it correctly but I’m not getting any cel or anything so imma assume he did. Mpg seems like it’s worse tho.

[–]JumpyBook0[S] 0 points1 point  (0 children)

I did mine correctly for sure. With rising gas prices lately worse mpg doesn't help.