a month ago I decided to replace stock plugs with denso IK22 and in comparing the stock gapping to the pre-gapped IK22 the stock looked way over gapped from the factory which killed my MPG and made my exhaust tip covered in soot. you can follow more here: https://www.fitfreak.net/forums/2nd-...tml#post982773

stock spark plugs @ 6K miles


to those experiencing poor MPG... you might want to check yours.