boostededge Posted July 29, 2019 Report Share Posted July 29, 2019 My owners manual says SP-542, but when I went to the dealer they tell me these plugs are superseded by the SP-578 plug & they dont have any information as far as heat range or material. A couple of googles also really didnt produce any factual data about this new plug. Does anyone know what the difference is and which one is optimal? Other than "tuners recommend 542" once all those plugs are gone we will be stuck with the 578's good or bad. 2 Quote Link to comment Share on other sites More sharing options...
1004ron Posted November 9, 2019 Report Share Posted November 9, 2019 On 7/29/2019 at 1:25 PM, boostededge said: My owners manual says SP-542, but when I went to the dealer they tell me these plugs are superseded by the SP-578 plug & they dont have any information as far as heat range or material. A couple of googles also really didnt produce any factual data about this new plug. Does anyone know what the difference is and which one is optimal? Other than "tuners recommend 542" once all those plugs are gone we will be stuck with the 578's good or bad. Looking at changing my plugs soon, and have the same question. 1 Quote Link to comment Share on other sites More sharing options...
1004ron Posted October 28, 2020 Report Share Posted October 28, 2020 (edited) Anyone bought spark plugs recently and does anyone have any feedback on the new Motocraft SP-578? I'm looking to buy soon and was also looking at the latest NGK 95605 Ruthenium HX. Also, any seals and gaskets needed? Edited October 28, 2020 by 1004ron 1 Quote Link to comment Share on other sites More sharing options...
WWWPerfA_ZN0W Posted October 29, 2020 Report Share Posted October 29, 2020 (edited) You may want to get the plugs from ford performance instead. These may work https://performanceparts.ford.com/part/M-12405-35T One discussion https://www.ecoboostperformanceforum.com/index.php/topic,10409 https://www.ecoboostperformanceforum.com/index.php/topic,10388 Loss of spark advance and slower 1/4 miles times among the reported issues. Edited October 29, 2020 by WWWPerfA_ZN0W 1 Quote Link to comment Share on other sites More sharing options...
1004ron Posted October 29, 2020 Report Share Posted October 29, 2020 39 minutes ago, WWWPerfA_ZN0W said: You may want to get the plugs from ford performance instead. These may work https://performanceparts.ford.com/part/M-12405-35T One discussion https://www.ecoboostperformanceforum.com/index.php/topic,10409 https://www.ecoboostperformanceforum.com/index.php/topic,10388 Loss of spark advance and slower 1/4 miles times among the reported issues. Thanks for that. Way better deal here: https://www.levittownfordparts.com/sku/m-12405-35t.html PART NUMBER: M-12405-35T The web site says they're not for the Edge, but are correct for the F-150 without detailing which F-150 engine. Not much details available for those plugs and not sure if they're better than the NGK 95605 Ruthenium HX 3 Quote Link to comment Share on other sites More sharing options...
todd92 Posted October 29, 2020 Report Share Posted October 29, 2020 Autolite XP5362. Motorcraft=Autolite. This is for the 2.7. XP5863 for the 2.0. XP5363 for the 3.5. 1 Quote Link to comment Share on other sites More sharing options...
onyxbfly Posted October 29, 2020 Report Share Posted October 29, 2020 6 hours ago, 1004ron said: Thanks for that. Way better deal here: https://www.levittownfordparts.com/sku/m-12405-35t.html PART NUMBER: M-12405-35T The web site says they're not for the Edge, but are correct for the F-150 without detailing which F-150 engine. Not much details available for those plugs and not sure if they're better than the NGK 95605 Ruthenium HX Good enough for the worlds fastest edge..... good enough for mine! 3 Quote Link to comment Share on other sites More sharing options...
1004ron Posted October 31, 2020 Report Share Posted October 31, 2020 On 10/29/2020 at 12:20 PM, WWWPerfA_ZN0W said: You may want to get the plugs from ford performance instead. These may work https://performanceparts.ford.com/part/M-12405-35T One discussion https://www.ecoboostperformanceforum.com/index.php/topic,10409 https://www.ecoboostperformanceforum.com/index.php/topic,10388 Loss of spark advance and slower 1/4 miles times among the reported issues. Response received from https://www.levittownfordparts.com Quote These are not recommended for the Edge. Fits: 2011-2019 F-150 3.5L EcoBoost 2017-2019 F-150 Raptor 3.5L EcoBoost 2010-2019 Taurus SHO 3.5L EcoBoost 2010-2019 Flex 3.5L EcoBoost 1 Quote Link to comment Share on other sites More sharing options...
Perblue Posted October 31, 2020 Report Share Posted October 31, 2020 14 hours ago, 1004ron said: Response received from https://www.levittownfordparts.com They may not be recommended but the 3.5L eco raptor guys were running the sp542s for a cold plug. The sp578s are now their recommended stock plug, both plugs that Sport/ST people use and are actually a hotter plug than the sp578. The M-12405-35T Is now actually the recommended replacement for the sp542s for them wanting a cold plug so it should be fine otherwise the other plugs should've caused issues also. 2 Quote Link to comment Share on other sites More sharing options...
WWWPerfA_ZN0W Posted November 1, 2020 Report Share Posted November 1, 2020 And availability for these plugs may be longer lived than the SP542s, but if you are an avid OCD plug changer, wouldn't be a bad idea to cough up some dough for a few sets at once. 1 Quote Link to comment Share on other sites More sharing options...
1004ron Posted November 7, 2020 Report Share Posted November 7, 2020 (edited) Today I decided to install the NGK 95605 Ruthenium HX plugs that I bought recently, .....not because they needed changing at 62K miles, but because I'm a tinkerer and and having the new plugs gave me itchy fingers. Plugs bought from Rockauto.com for $53 shipped. The original plugs would easily be good for 100+K miles and all their gaps were a snug 32 thou. With the plugs out looking down on top of the pistons they are so clean I could read the numbers on their crowns - my Edge only gets Costco Top Tier premium. The job took just over 4 hours, which includes a trip to Lowe's to get additional 1/2" drive socket extensions. The rear plugs are a challenge - I did not remove the air tube coming up from the rear turbo and it would be easier with that out of the way. I removed the flex rubber tube connecting it to the air filter housing and pulled it to left and right to get the two plugs that it obstructs. For the rear plugs you need to secure the plug socket to a 5" extension and once inserted down the tube and onto the plug then place the 2" or 3" extension onto that, and then a ratchet with pivoting head - this is due to the restricted head clearance. Added a little dielectric grease to the rubber ignition coils tubes to prevent them sticking to the plug porcelain part of the plug. I'm not a good technical author, so feel free to ask questions if you plan on this DIY. Excerpt from the service manual. Ignition Coil-On-Plug.pdf No anti-seize used on the plug threads as per the manufacturers recommendation. https://ngksparkplugs.com/en/resources/5-things-you-should-know-about-spark-plugs Edited November 7, 2020 by 1004ron 6 Quote Link to comment Share on other sites More sharing options...
handfiler Posted November 7, 2020 Report Share Posted November 7, 2020 47 minutes ago, 1004ron said: I'm not a good technical author, so feel free to ask questions if you plan on this DIY. Excerpt from the service manual. Ignition Coil-On-Plug.pdf No anti-seize used on the plug threads as per the manufacturers recommendation. https://ngksparkplugs.com/en/resources/5-things-you-should-know-about-spark-plugs The pictures and links more than make up for it. A salute to tinkerers everywhere! ? 4 Quote Link to comment Share on other sites More sharing options...
WWWPerfA_ZN0W Posted November 8, 2020 Report Share Posted November 8, 2020 Did you gap the old/new plugs? Ecoboost plugs don't like much gap growth before starting to show signs of wear, compared to those for NA engines. 2 Quote Link to comment Share on other sites More sharing options...
1004ron Posted November 8, 2020 Report Share Posted November 8, 2020 (edited) 12 hours ago, WWWPerfA_ZN0W said: Did you gap the old/new plugs? Ecoboost plugs don't like much gap growth before starting to show signs of wear, compared to those for NA engines. The old plugs gap was still spot on at 32 thou, and I checked the new NGK plugs and they were closer to 30 thou and I left them at that - no gapping done. BTW, I also changed the plugs in my wife's NA Mustang 3.7L V6 this weekend using the NGK Ruthenium HX plugs. It has 65K miles on the clock and I'd say that it was due for replacement plugs due the gap growth which is 50 thou to start with new - although it requires removal of the intake air plenum its a much easier job. Edited November 8, 2020 by 1004ron 3 Quote Link to comment Share on other sites More sharing options...
WWWPerfA_ZN0W Posted November 9, 2020 Report Share Posted November 9, 2020 Your Edge is running very well, keep up the good work! 1 Quote Link to comment Share on other sites More sharing options...
Tlaner30 Posted May 10, 2022 Report Share Posted May 10, 2022 (edited) On 11/7/2020 at 2:36 PM, 1004ron said: Today I decided to install the NGK 95605 Ruthenium HX plugs What torque did you tighten the plugs to? Edited May 10, 2022 by 1004ron No need to quote everything ! 1 Quote Link to comment Share on other sites More sharing options...
1004ron Posted May 10, 2022 Report Share Posted May 10, 2022 (edited) 4 hours ago, Tlaner30 said: What torque did you tighten the plugs to? I don't use a torque wrench on spark plugs, but would advise following the tightening instructions on the NGK packaging, which is specific the the plug and its seal arrangement. The top image is for the NGK 95605 Ruthenium HX plugs Edited May 10, 2022 by 1004ron Added image 2 1 Quote Link to comment Share on other sites More sharing options...
Xtra Posted May 13, 2022 Report Share Posted May 13, 2022 (edited) On 11/7/2020 at 11:36 AM, 1004ron said: Today I decided to install the NGK 95605 Ruthenium HX plugs that I bought recently, .....not because they needed changing at 62K miles, but because I'm a tinkerer and and having the new plugs gave me itchy fingers. Plugs bought from Rockauto.com for $53 shipped. Have you noticed any difference in the Edge or Mustang's power, milage, smoothness at idle, cruising or acceleration after installing the new NGK Ruthenium HX plugs ? Nice job with the photos, explanation of a new product and the tools needed. Edited May 13, 2022 by Xtra Quote Link to comment Share on other sites More sharing options...
1004ron Posted May 13, 2022 Report Share Posted May 13, 2022 24 minutes ago, Xtra said: Have you noticed any difference in the Edge or Mustang's power, milage, smoothness at idle, cruising or acceleration after installing the new NGK Ruthenium HX plugs ? Nice job with the photos, explanation of a new product and the tools needed. Thanks. No discernible difference, but that can be expected considering the original plugs were still very good. Bear in mind that I baby the car, never once been above 5K RPM. I installed the NGK's at 62,300 miles and I'm at 79,500 miles and still going like it did when I took delivery of it in March 2017. I bought my Edge while I was abroad, never sat in an Edge let alone test drive one, and the dealership's courtesy driver picked my wife and I up at the airport with all our baggage. I was familiar with the dealership because I had the company car serviced there for a few years. 1 Quote Link to comment Share on other sites More sharing options...
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