Spark plug Bosch or Champion

Pretty sure it had original plugs in it, replaced those with some autolites that were on sale, soon to put champion coppers in it though (personal preference).

Yeah, I'd rather use some cheap BOSCH SUPERS or other $2 copper plug than any Autolite.

Sometimes you just have to try a few sets. I have a '97 Jetta which had NGK plugs in it for close to 4 years. I went through two sets of NGK plugs and couldn't get the car to run. I switched to Bosch and it started right up and ran fine.

Since Iridium is tough, and there is platinum at the tip of the movable electrode, I bought Bosch Iridium.

Try champion part number 7989 it's one solid piece not 2 like motorcraft I've had good luck with them

Honesty I've just used Champion all year's or whatever less than five bucks and have never ever given me any issues.

I'm using the OEM Bosch spark plug. I gapped mine to 0.024" as per Bentley and the car seems to run fine.

I do know certain Toyota "sporty" cars run like crap on Champions.

Lesson learned: DO NOT EVER EVER EVER USE BOSCH PLATINUM (STANDARD TIP) SPARK PLUGS IN YOUR VR6 ENGINE.... THEY JUST DON'T WORK!

If you use anything but OEM plugs in a stock white block, well just don't do that. Also Bosch Platinum, great for having to pull your head and find out what the center of the plug did to your engine