Phil Bagshaw

I thought this topic deserved its own thread. It started in my earlier post about servicing recommendations. There's a stack of spark plug manufacturers and new technology available. The part number for the plugs is 999-170-207-91.
Pelican parts list 3 types with this part number:

999-170-207-91-M14...Bosch FGR-6-KQE (7413) 4 ground electrodes NiY/Cu
999-170-207-91-M47...Beru 14 FGR-6 KQU 4 ground electrodes
999-170-207-91-M220..NGK BKR6EKUB (7969)2 ground electrodes, Ni/Cu

Beru is marked as OEM and Bosch have alternative technology such as Iridium, Double Platinum, Platinum Super Plus, Platinum Ir Fusion+4, Platinum+4. On paper, I think the Bosch Platinum+4 or Platinum Ir Fusion+4 are the best options with improved materials technology compared to the standard plug but with retention of the 4 ground electrodes and associated benefits. Pelican Parts state the Platinum Ir Fusion+4 is no longer available (not sure why) so that puts the Bosch Platinum+4 top of my list in terms of technology, materials and availability. Anybody tried them and know what they run like?

gfl

honestly, i have never noted any clear differences between any properly operating, proper temp spec, relatively new, plugs.

"how they run" is a dangerous metric unless it is accompanied by dyno runs or a stopwatch, and truly comparable conditions (temperature, engine soak, etc.)

Just my two cents

Grant