Spark plug recommendations

[KSC 2019 XLT]

I have a 2019 Expy XLT 4WD with about 77k miles and looking to replace the spark plugs. Looking for spark plug brands and models you all would recommend.

 

[keny01998]

Stick to Motorcraft SP594. I just replaced mine at 113k miles few days ago. Last swap was at 50k miles. I recommend to change out every 60k miles.

 

[Left Coast Geek]

I changed my original plugs at 65k miles, and they still looked nearly new, no erosion at all.



I used NGK 90495 LTR6BHX Ruthenium HX

 

[JamaicaJoe]

I changed my original plugs at 65k miles, and they still looked nearly new, no erosion at all.

View attachment 83932

I used NGK 90495 LTR6BHX Ruthenium HX

Did you measure those gaps??

 

[Left Coast Geek]

I don't remember if I did. the only spark plug gapping tool I have dates back to when I owned Volkswagens in the early 80s..

 

[Dice Roll]

NGK ruthenium off rockauto. Best deal I found. I changed mine at 30k for no reason, as they looked like they came out of a box. Zero wear. Gaps were all .028 across the board.

 

[HILLY]

Just did my plugs and boots Tuesday.
NGK Ruthenium’s that I got off Rock Auto. #90495. $8.70/ea
Motorcraft Ignition Coil Boot - WR6151. $7.36/ea

They were all pre gapped and even across the board - 0.032". I had used these in my previous Expedition and ran great & smooth. I’m only at 25k miles, but the truck is six years old now, plus I bought used so I’m trying to establish baseline for maintenance items.

 

[ccssid]

Just did my plugs and boots Tuesday.
NGK Ruthenium’s that I got off Rock Auto. #90495. $8.70/ea
Motorcraft Ignition Coil Boot - WR6151. $7.36/ea

They were all pre gapped and even across the board - 0.032". I had used these in my previous Expedition and ran great & smooth. I’m only at 25k miles, but the truck is six years old now, plus I bought used so I’m trying to establish baseline for maintenance items.

I feel like I was ripped off. Just paid $7.37 for the same boots at RockAuto about a week ago.

 

[HILLY]

I feel like I was ripped off. Just paid $7.37 for the same boots at RockAuto about a week ago.

Sorry. That’s happened a few times to me. Like buying the stock market.

 

[smp7032b]

Just put in NGK Ruthenium 1 Step Colder Spark Plugs HX LTR7BHX 95605 in 22 SPP

 

[ZigZagFred]

Hi fellow Expys! The owner's manual for my 2019 Limited recommends spark change at 100,000 miles. Why are we changing our plugs so early?

 

[JD34]

Hi fellow Expys! The owner's manual for my 2019 Limited recommends spark change at 100,000 miles. Why are we changing our plugs so early?

Less chance of getting a stuck one or 2 or??

 

[Dice Roll]

Hi fellow Expys! The owner's manual for my 2019 Limited recommends spark change at 100,000 miles. Why are we changing our plugs so early?

From what I’ve seen, guys running a tune are seeing higher wear. Mine on a stock tune had zero wear at 30k. Zilch.

You might reasonably get by without new boots like I did by changing before they get brittle. I put NGK ruthenium in and won’t revisit this for a loooooonnnnnggggg time.

 

[Grizguy]

Did the spark plug change help gas milage?

 

[Dice Roll]

Not a bit. I’ve been doing cars as a hobby for thirty years. I feel the low end is a little sharper with the ruthenium plugs. Just my seat of the pants meter. Nothing scientific on that.

 

[bb37]

Why are we changing our plugs so early?

Because they fail before Ford's recommended mileage.

I have personally experienced spark plug failure in a 2015 Expedition with 3.5 Ecoboost V6. Vehicle had about 70,000 miles on it. I tried to pass someone on a two-lane road that was slightly uphill. At full throttle, the engine began running rough and the check engine light flashed then became steady. After driving a few more miles, I tried another full throttle acceleration and again the engine ran rough with a flashing check engine light. The fix was to replace the plugs.