[Tidybuoy]

I was going to change my plugs today. I got my plugs last week and today I noticed that the part number is slightly different than what I used last time.

Last time I got Bosch Super WR7DC+ and this time the plugs are WR7CDX+

What does the X mean in the part number and is it ok to use these plugs.

Also, any experiences with the Platinum, Platinum Plus, Quad, Sextuplets, yada, yada, yada, etc...

Thanks in advance....Vern