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I just joined up, from driving a Nissan SE-R specV, am driving an 02 Civic EX now. (will post some pics of sound dampening install later, when uploads come back)

On my previous car, I changed out the gear oil for Redline-it seemed to smooth out and quiet the tranny a bit. I was thinking about doing it on this car, but the Honda manual asked for a much lighter oil (Redline is 85 weight I think)
Anyone use it?


Also, Honda seems to indicate not changing the spark plugs until 100k. The car has 26k on it. I've always changed at 30k intervals. Should I ignore the manual and changed them anyway?

Thanks for the info.

 
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I'm using MTL right now having changed it out at 5k miles. It is an excellent replacement for the Honda fluid.

I think part of your confusion comes from the label on the RL bottle. It meets the gear specs of the 75w oil but it has the viscosity of 10w-30 motor oil. Honda requires a gear oil within this spec and your manual allows temporary use of 10w-30 motor oil in your tranny. The RL bottle states that it meets tranny requirements calling for a 10w30 viscosity ergo, it isn't too thick (just what Honda recommends, actually) and will work perfectly well for you.

The plugs will still work at 100k but they'll be in terrible shape. With the coil over and high zoot ignition system anything will fire at that mileage but you'll have reduced efficiency with high gaps. Your car also calls for 120k antifreeze changes which is lunancy. This extended maintence schedule was, IMO, developed by the marketing people.

To answer your question I'd suggest 30k plug changes with conventional copper or iridium plugs. Double plats can comfortably go 50k.