Choosing the best performance spark plugs

[obi_waynne]

Spark plugs "A bright spark" One of the most essential elements in an engine is the spark plug which is often overlooked. The stronger and larger the spark the better the combustion. A bigger spark will ignite the air/fuel charge more effectively. It is the burn rate and expansion of the flame front which causes […]

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[T9 man]

Some cars are particularly fussy with regards to spark plugs. My own chariot dislikes plugs which cost nearly 3 times more than the ones in the engine right now

 

[TCJBOLDIE]

I use NGK Iridium

FYI multi earth plugs will only produce 1 spark at a time and not spark to all earth electrodes at the same time.

 

[SLEEPER]

+1
Thats two plug threads live at the same time.

 

[old-git]

And both started by Waynne

 

[obi_waynne]

And both started by Waynne

Doh - getting senile in my old age and starting to repeat myself!

 

[obi_waynne]

Doh - getting senile in my old age and starting to repeat myself!

 

[HDi fun]

I had the 528i fitted with Denso Iridium plugs - these are single earth electrode type rather than the BMW (Bosch) ones with four earth electrodes. No discernible difference in performance, price similar and both types rated to last 80,000 miles in that engine.