MMcElvy

Looking to do plugs for the first time on my new to me, 2014 F150 Ecoboost, 45k miles. From what I've read everyone seems to stick with Motorcraft SP-580's but I found these, NGK90495Ruthenium HX, the are supposed to be a step up from Iridium plugs for Turbo engines. Thoughts?

JCR 56

Stick with what works, Motorcraft.

McLovin

SP-534’s @.030! Cheap insurance to replace the bolts also.

MMcElvy

Which bolts are you referring to?

McLovin

I’m soooo sorry! That was an “auto correct “ typo. It should have been BOOTS! The rubber boot that goes between the plug and the coil. They are just a few bucks each. A tiny, tiny, TINY bit of anti-seize for aluminum on the plug threads and dilectric grease between the plug and boot. Others may disagree but if used sparingly, it won’t hurt!

MMcElvy

I was planning all that, just considering the newer NGK Ruthenium plugs

McLovin

I really don’t have any input on these new NGK’s. This is the first I’m hearing about them but I do know that NGK does have a good reputation for producing quality parts.
I can say that these newer Ford engines tend to react better with certain OEM parts. Spark plugs, coils etc.
If you do go with the NGK’s, please give us some feedback. I’m sure others would also be curious.

DarrinT04

I would stick with what we know works best and that's motorcraft. If you go the NGK route please give us feedback. What I've heard about them I like but I dont have experience using them

dac12046

I've always replaced my spark plugs with the motorcraft sp534 still got the stock boots and coil packs I just bought the sp580 Haven't installed them since I order a new truck with the 5.0. never had a problem with the mis fires currently have 142,000 on my 2013 fx4 Ecoboost all stock

MMcElvy

Well I was not having a particular issue, just trying to get my best mileage. Changed plugs with the New NGK's and replaced the boots while I was at it. Runs as well as it was and mileage is still about the same, crap, so no harm no foul so far!