About a year ago, I changed out my plugs replacing them with Bosch 4+ plugs (4418?). These new plugs have four electrodes - so are different than other plugs I have seen. While there was no change in driving around the city - there was a great improvement in driving at 70+MPH with the new plugs. The car sometimes would ping shifting gears (automatic) at this speed with OEM plugs - but the pinging was nearly gone with the new plugs - plus I had a lot more power from 65+ MPH. Anyone else have this experience? I have 1996 RAV4 Automatic without any other ignition mods.