Lacienega Posted January 31, 2020 Report Share Posted January 31, 2020 Hi People, I am reaching my 100k miles and will be due for new spark plugs soon, my manual states I will need the motorcraft CYFS12YPC5/ SP531. Problem is, I can't find these plugs anywhere. Even on the Ford website they are not available and they point me to the motorcraft SP530 plugs instead. Can anyone confirm that these are an updated version of the SP 531?? Thanks Quote Link to comment Share on other sites More sharing options...
plus 3 golfer Posted January 31, 2020 Report Share Posted January 31, 2020 I believe the main and likely only difference is that the 530s are iridium which among other different properties lasts longer than platinum. https://www.championautoparts.com/Parts-Matter/automotive-repair-and-maintenance/Spark-Plug-Materials.html Also, for those changing air filter, check the torque on your plugs. Read my post and compare my pic with other pic above showing oil on plugs. Lacienega 1 Quote Link to comment Share on other sites More sharing options...
Lacienega Posted February 1, 2020 Author Report Share Posted February 1, 2020 If they last longer does that mean they will last longer than 100k miles ? Quote Link to comment Share on other sites More sharing options...
plus 3 golfer Posted February 1, 2020 Report Share Posted February 1, 2020 9 hours ago, Lacienega said: If they last longer does that mean they will last longer than 100k miles ? Champion says 25% longer than platinum. 125k miles ? Maintenance schedules are generally very conservative to begin with (OCI, filter changes, spark plugs and so forth). The best way to determine when to change oil, filters, spark plugs is to “measure” ‘the performance of the item and estimate how such loss in performance will affect overall performance / additional future cost (difficult to do). For example, you can send oil samples for Used Oil Analysis. A UOA will likely cost more than a DIY oil change but oil performance can affect the “life” of ICE. With respect to spark plugs, one can visually check, measure leakage from tip to ground, and monitor misfires with scan tool. But, if one has to remove plug to evaluate whether to change at 100k miles, 125k miles, or 200k miles, one might as well just change them. Also, remember that ICE might only run for 70% of the total mileage. So, with iridium, it wouldn’t surprise me if one could get 200k+ vehicle miles or more on a set of plugs.? Lacienega 1 Quote Link to comment Share on other sites More sharing options...
ptjones Posted February 2, 2020 Report Share Posted February 2, 2020 Don't waste your money, I changed mine at around 200k mi./ 100k ICE miles and the gap was fine. I doubt you have more than 60k ICE miles. Car didn't run any better with new plugs. Paul Lacienega 1 Quote Link to comment Share on other sites More sharing options...
Lacienega Posted February 19, 2020 Author Report Share Posted February 19, 2020 I see so much about counterfeit parts being sold online...I bought my motorcraft plugs at o reilys auto parts store. How do I know that I didn't get any counterfeits here?? Quote Link to comment Share on other sites More sharing options...
ptjones Posted February 19, 2020 Report Share Posted February 19, 2020 Here are the plugs I replaced and the gaps were fine. Paul Quote Link to comment Share on other sites More sharing options...
Lacienega Posted February 20, 2020 Author Report Share Posted February 20, 2020 Where did you buy them? Quote Link to comment Share on other sites More sharing options...
Lacienega Posted March 8, 2020 Author Report Share Posted March 8, 2020 (edited) So I changed my plugs last night with the updated motorcraft sp 530 plugs, and guess what?? My car already had the exact same plugs in it. So they should have updated the 2014 owners manual. I have to agree with ptjones...the old plugs looked like they still had a lot of life left in them and the gap was looking good as well. I just thought after 101 500 ml it would be a good time to change them. Good thing they last that long, because it's a hassle to get to them. (air-filter assembly has to get off) Edited March 8, 2020 by Lacienega bigqueue and ptjones 2 Quote Link to comment Share on other sites More sharing options...
JohnTrigger Posted July 22 Report Share Posted July 22 (edited) I know this is a 4+ yr old topic revival but for those who may read it later… My 2013 CMax SEL has been with my son at college and grad school for about six years and recently I got it back. Decided to change the spark plugs at about 112,000 miles. As above could not find the SP531 version called for in the owner’s manual. Ford dealer said it’s now SP530 iridium for my model (SP531s were in mine from factory once I removed them). Bought the same Motorcraft SP530s at AutoZone, however, as they were ~ $6 cheaper each. And just like Plus3Golfer said for his, my third one from the left was very loose and had blow by on it. I didn’t even need a wrench to remove it. So do as he suggests and check your torque when you change your air filter. I had to be losing some compression on this cylinder. The other three were stuck in there pretty good so I used some Kroil penetrating spray oil to help loosen them up so I wouldn’t strip or damage any threads. As I was removing them I’d go out maybe half turn and in a quarter turn and did this back and forth for a few turns until they felt ready to come out normally. I then cleaned the spark plug holes and cylinder threads carefully with a little brakekleen sprayed onto the big tips of some long wooden Q-tip swabs that I have. Torqued to ~9 ftlbs. Edited August 18 by JohnTrigger Additional info Quote Link to comment Share on other sites More sharing options...
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