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DISCUSSION => Engine + Driveline => Topic started by: tricky8 on November 22, 2010, 02:26:31 PM

Title: Spark Plugs recommended
Post by: tricky8 on November 22, 2010, 02:26:31 PM

What are the best performance spark plugs for an M42 engine?
What do you guys have in your engines?

Thanks.

Title: Spark Plugs recommended
Post by: bmwconnect on November 22, 2010, 02:29:17 PM

Personally I use NGK Iridium IX and stand by them as a great product!!

Title: Spark Plugs recommended
Post by: dkbmxer002 on November 22, 2010, 02:41:01 PM

i use ngk or autolite copper's....

Title: Spark Plugs recommended
Post by: YetiX on November 22, 2010, 05:47:57 PM

I was researching this last week.  The consensus seems to be use the stock NGK plugs.  Do NOT use the Bosch Platinum plugs, apparently they suck in our engines.

Title: Spark Plugs recommended
Post by: DesktopDave on November 22, 2010, 06:08:31 PM

I use NGK coppers or Denso Iridiums on all my vehicles.  I think the Denso plugs are now owned by NGK anyway.

Title: Spark Plugs recommended
Post by: e30Andym42 on November 22, 2010, 06:23:41 PM

I have Bosch Platinum 2/4's (can't remember which).  They're okay I suppose, but then again, they are the only plugs I had since I bought it with some random worn out plugs.

I'd say stick to the NGK's.  Everyone suggests them.  Just wish I knew that when I bought mine...

Title: Spark Plugs recommended
Post by: DesktopDave on November 22, 2010, 07:42:34 PM

There honestly isn't that much of a difference between different plugs.  I did have an old Nissan Sentra that eventually stopped running when I used Bosch platinum plugs.  More the car's trouble than the plugs, but still surprising.

I'd avoid anything that has a sloppy tolerance.  The NGK's I buy usually have less than 5% tolerance (in ohms resistance).  Worst was a set of Champion clearance specials that were over 25%.  The very pricey iridiums might improve fuel mileage slightly.

Title: Spark Plugs recommended
Post by: bmwm42 on November 23, 2010, 02:10:52 AM

I use ngk BKR6EQUP plugs and love em also use them on my e39 on

Title: Spark Plugs recommended
Post by: mrmckie on November 23, 2010, 10:27:58 AM

guess i joined a day late..i bought and installed a set of bosch platinum +2's.  I use the Bosch in my m20 because everyone recomended them, i figured it would be the same with this engine..guess not..

Title: Spark Plugs recommended
Post by: tjts1 on November 25, 2010, 03:15:17 PM

Bkr6ek

Title: Spark Plugs recommended
Post by: Royal on November 27, 2010, 03:29:43 PM

I have NGK R V-Line

Title: Spark Plugs recommended
Post by: d.hitchcock on January 08, 2012, 10:02:54 PM

Thanks for this thread, M42club!

I know the brand/type of spark plug is basic, but everybody's gotta ask for the first time around, right?

d.hitchcock, M42 noob ... :D