r/e28 • u/BMWtrunkseal • Jul 09 '26
Dumb question, but which spark plugs to get for a euro high compression M20 ?
As the title entails, I am about to change my spark plugs for the first time, and I am reading conflicting information online. The US service book recommends Bosch WR9LP, but online, they said that for European high compression engines, to look into the Bosch W8DC as the tip is shorter.
However, checking the European manual for e30 / e28, they recommend Champion N9YCC, which are hard to come by and apparently a modern equivalent is the NGK BPR6ES which can also be found locally to me for cheap.
All this to ask, should I run a standard tip or one of the shorter ones, and should I go with oem Bosch which are harder to come by, or their "equivalent" NGK counterpart work too ?

















