I pulled the spark plugs today... first time I've ever done this on a Subaru engine. Wasn't too bad with the battery and air filter box removed.
I suspect these NGK spark plugs (BKR6EIX-P
) have been in this engine for a long
time. Car has 140,000 km on it. I was a little disappointed to discover that the spark plug from cylinder #4 was rather oily. The sheen is noticeable on the ground electrode and on the nose of its ceramic insulator in the image below. I'm hoping this isn't an indication that major engine issues are imminent (or have already
I want to replace these with regular BKR6E
spark plugs. I see that NGK has a slightly different version of this plug, BKR6EYA
which is supposed to be "fouling resistant". I thought maybe this might be worthwhile to try keeping in mind that one cylinder seems to have an oil problem. Anyone have any thoughts on this? Any reason why using a "YA" plug (fouling resistant) would be a bad