Spark plug Bosch or Denso

I did not, and bought the Denso Iridiums. I have less misfires and slightly stronger gas mileage since install. Just my experience.

VAG engines seem to like their factory recommended Bosch plugs better than any other.

I used Bosch W4CS (cheap plug) with good results in my G60.

I just replaced my plugs in an 89 16v yesterday. I ended up getting the Bosch platinum +2. I was leery of the platinums as everybody seems to knock them, but my car runs fine. They were 4 bucks each.

got my f6dtc's at the dealer (only place i could find them), and they were around 4 bucks a piece. car ran like a dream.

I like the Denso 3008's I've been using for a couple years now in my turbo.

i;ve ran bosch plat 2 prongs for 2 yrs no problems! once I got my arcing wires sorted...

Been using the desno IK24's with a .32 gap. Works very well but that plug is a tad to cold. Runs a tad rough untill I get her warmed up.

I have a strong opinion in not suggesting the Bosch or the Beru. There is a reason that BOSH is no longer the OE spark plug in VW, Audi, BMW, Mercedes Benz etc., etc... Stick to the NGK, especially in a VR6, NGK has been OE since the intro of the VR6 six months after Bosh failed to produce a plug that would run in these engine during start up. The Bosch had nothing but running problems.

And I tried both the Bosch and the NGK back to back, and the NGK ran far better than the Bosch. The Bosch were terrible in my case.