Some swear by Bosch, others like NGK or a platinum what are your thoughts? Tom
I use what my owner's manual recommends. In the case of my 91 Civic, they're NGK non-platinum. (There might be one other brand recommended in the manual.) A dealer put platinums in my car a few years ago. I have since changed them out. I don't notice any better performance. I suppose the platinums might last longer, but IIRC from reading on the net it may not be enough to justify the higher expense.
My 91 Civic Si had a set of SplitFire plugs, then recently it started to miss in low RPMs. I replaced them a set of Nippon Denso (non-Iridium 3808). $1.69 at AutoZone. Now it runs great and getting 31 mpg. Bosch are overrated when it comes to Platinum. I read somewhere a long time ago that the platinum they use is from recycled catalytic converters. If you need a hotter plug, I suggest the Denso Racing Iridium. Iridium is way better than platinum.
jjjsan, i am curious, my 2001 honda civic sedan seems to be running fine, and in reading the manual it says that the first tuneup is not due until 110,000 miles and to replace the spark plugs then, and i got 50,000 miles now. Do you notice a difference when you replace the plugs, and how big a difference? tia, Fish
I have just put NGK platinum's in my 92 Civic. They ran me about $2.50 a piece (before tax) That and a new set of NGK wires set me up right... Brian
I would not change plugs inless you notice performance or mileage decreasing. If your civic has platinum plugs, they will last for some +60k to 100k miles, but you might want to check the condition of the plugs and replace if worn. Stick with NGK or ND plug brands.