njaremka

this is probably the wrong place for this, but here goes:

i just wanted to share my experience with the group. i recently changed my spark plugs to bosch platinum +4's, and since then i have noticed a slight improvment in gas milage and smooth running. it has been talked about on this thread that since the design of the +4's is different, it can lead to early fouling and what not, and descreased performance. well, i haven't noticed any of those things. i also want to take this opportunity to say that since i had purcahsed the car, i have been running premium fuel (93 octane) with no bad side effects. i have also heard it said on this forum that 93 octane gas will cas more carbon build-up than 87, thus leading to poor performance. on my stock plugs i would average about 28-29 miles per gallon, and on the +4's i average about 30-31 miles per gallon.

well, here are my plugs. this first picture shows the stock plugs with about 18,000 miles on them, all but the first tank run on 93 octane gas. the second picture shows the +4's with about 6,000 miles on them, showing a similar color pattern to the stock plugs.





i plan on replacing my plug wires with either sparkco or magnacores in the future, and i hope these to give a similar bump in fuel economy/performance.

again, i share this as my experience. your mileage may vary.

alcoholiday

thanks for the info. plugs is probably the next change i'll make.

you'll enjoy upgrading the ignition wires. i've had the sparkco's on for almost a week and i feel a marked improvement in smoothness throughout the revs.