Author Topic: Spark Plugs recommended (Read 5174 times)

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.

bmwconnect · « **Reply #1 on:** November 22, 2010, 02:29:17 PM »

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

dkbmxer002 · « **Reply #2 on:** November 22, 2010, 02:41:01 PM »

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

YetiX · « **Reply #3 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.

DesktopDave · « **Reply #4 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.

e30Andym42 · « **Reply #5 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...

DesktopDave · « **Reply #6 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.

bmwm42 · « **Reply #7 on:** November 23, 2010, 02:10:52 AM »

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

mrmckie · « **Reply #8 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..

tjts1 · « **Reply #9 on:** November 25, 2010, 03:15:17 PM »

Bkr6ek

Royal · « **Reply #10 on:** November 27, 2010, 03:29:43 PM »

I have NGK R V-Line

d.hitchcock · « **Reply #11 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 ...