I have just had my 26th MOT on my Saff, passed again with no advisories but took it out today to charge up the battery (local of course) and after a few miles had a 3 cylinder car which was not good!! Limped it home and suspected a plug had gone down which is what is was. The IK27 ones have been in the engine for quite a while so treated it to a brand new set of Denso Iridium Power IK31 plugs which I have had for a while. Very pleased with them and the car seems to go even harder!! I know some people rate them and some don't but I am well impressed with them. Anyone else used them?