2011 f150 eco...which spark plug?
We have a bone stock 2011 F150 Ecoboost. The truck has a lift and 35" tires but performance wise is stock. We just had the TSB that gave us the new intercooler, cat, and tune and figured with 58k miles of running too rich it might be good to put some fresh plugs in it.
What is the stock spark plug part #? I am finding some sites saying motorcraft sp-528. Does NGK make an equivalent? All my research is giving me results for different plugs for people who are tuning and running more boost (thus changing heat range). I just want a stock style equivalent.