Dan McBoost

...

I currently have the bosch platinum 4s are also multi ground, and I do not care for them. The car is a bit lumpy running, ew. Noticed the same thing in a friends supra that tried the bosch plat 4s out for a DAY. I run NGK laser platinum (single ground) in my supras and am impressed. These were available for the A8 and can not be ordered any longer:/

What are we using fellow A8 ers?

backdoc

Dan,
From reading past posts I decided against the the Bosch +4s, and went with the NGK when replacing my plugs last summer. Seem to be working just fine.
Doug G.

99A8Q

And the car's running VERY well. The stock plugs were also quad electrode Bosch, although the electrodes were fatter-- the replacement +4s have finer (more like wire) drains. The originals (I assume) had 46K and looked pretty fair, although looked like they'd been running fairly lean. Now: silky smooth idle, instant starts. So far so great.

KaMaKaZieP -ALUMIN8-

I hear that the VW/Audis do not like any platinum plugs.

JimR

I'd go with NGK. I had already bought a replacement set of Bosch plugs, so that's what went in. Lightly coated with anti-seize.

<img src="http://pictureposter.audiworld.com/1018/plug_shear_1.jpg">

Wheaton

Never had a problem with them.

Dan McBoost

Info soon.

CaseyH

From my research I went with the NGK plugs. I bought them from Euopeanautomotive.com

JörgenK

I'm very interested, it's time for me to get new plugs soon.

Dan McBoost

Ohh. Wonderfully. Definitely smoother idle, and throttle response seems to be a bit better.