Spark plugs? I have installed lots over the many years of being a
"shade tree wrench".

Clearly, any of the quality brands will do ,and there is no performance
difference in normal use.

I have had good luck with either the Bosch Plat. or the Autolite Plat. in
some of my seven cars.

In the S70, I need to remind myself to change the plugs every 30K just to make
certain that the old ones come out of that alum. cyl. head successfully.

My tip is 1- buy a good brand 2- use anti-seize compound 3- torque to specs.
I also use dielectic silcone grease boots to make them separate properly next tiem.

I have put well over a million miles on my cars, and never had a plug problem using these simple concepts!

NMBIS 2000