Well , here's one for older 90's vintage Honda owners, a friends 1989 civic was not staring as quickly , this was back in 91 when it was only 2 years old, so I figured i would change the plugs, since it was only thing i could figure would make it a bit more hard starting, it had about 30 k miles, it worked and all was well, i called the local Honda dealer about it explaining how my Ford van had 50 k and no issues whatsoever, anyway he told me Honda's need new plugs every 15 K miles or mileage suffers, but nobody changed them !, my next girlfriend had an Accord , she started complaining about mileage, in went new plugs and 5 more MPG. change plugs more often and if you gap them , open them up a few thousands more for a fatter spark,
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