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Old 07-25-2008, 03:18 AM   #5 (permalink)
cfg83's Avatar
Join Date: Dec 2007
Location: Southern California
Posts: 5,864

1999 Saturn SW2 - '99 Saturn SW2 Wagon
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90 day: 40.49 mpg (US)
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rjacob -

I have Denso Iridiums and I like them. When I first started hypermiling, I got my best MPG after installing them (up to that point). However, that could have been an "MPG bump" from just changing the plugs.

Also, overwhelmingly recommends OEM plugs for my Saturn. If I were you, I would go to a Honda Civic forum that specializes in your generation of Civic to find out what works for them. This will give you an "informed baseline" for your drivetrain.

Hmmmm, I think I've had them for betwen 45K and 60K miiles. Maybe it's time for a new set.


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