'91 240 wagon has been mine 2.5 years, since 201K, now at 224 or so K. Starts a little rough, fine when warm, and I just want to give it new plugs and wires. Some oil (had to replace oil filler cap) got down on that side of the engine in the first miles but rough start is my only diagnostic. Anyone have favorite brands for this great engine? Or all the same?
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