The owners manual of my 2001 K11 says to use Bosch FR8DCX spark plugs.
When I look on ebay, I see FR8DCX and FR8DCX+
Can anyone explain what difference the "+" makes?
I currently have NGK plugs and I'm having a slight problem at low idle speeds when the car is in neutral - the engine revs drop to a point where it is almost cutting out, before picking back up again.
Putting the "recommended" plugs in seems the obvious first thing to try.
When I look on ebay, I see FR8DCX and FR8DCX+
Can anyone explain what difference the "+" makes?
I currently have NGK plugs and I'm having a slight problem at low idle speeds when the car is in neutral - the engine revs drop to a point where it is almost cutting out, before picking back up again.
Putting the "recommended" plugs in seems the obvious first thing to try.