Hi All

I picked up a used, high milage (for it's age) 17 F250 6.2 a few days ago. The salesman told me the new style plugs are good for 150k mi. The truck has 79k mi, and I thought I'd change them out anyway. I couldn't find much doing a search on 17+. Would you go back with the Motorcraft plugs or is there another brand that would be better? Sounds like the older pickups are having trouble getting the plugs out without breakage, would it be beneficial to run a dab of anti-sieze on the new ones?

Thanks

 

Whats a spark plug? (diesel owner )

 

It's the little sparky things in the truck I'll be driving when my 6.7 is in the shop again for emissions BS. funny... but not really

 

 

I would stick with Motorcraft Plugs but I wouldn't recommend running them for 150k - could cause problems with the cats. Under normal operating conditions change by 97k. When towing change at 60k. I pulled this from the Ford Maintenance Schedules site. Enter Year, Make, and Model or VIN.

 

 

The manual in my 2018 says 97k miles (that's not a typo). Go to www.motorcraftservice.com and look up the manual for yours.

With 79k miles on them, I'd do them now for sure. The 6.2L is a great motor but is actually known to be a bit hard on plugs. Many will change them between 50k to 75k miles. Also, there are 16 of them (two per cylinder). when the plugs go bad, it tends to cause incomplete burn and then the hot gases mess with the Cats and then the $$$ really piles up fast! Change them as soon as you get the truck. Starting with cold engine, warm it up a bit for a few minutes (not full temp; just warm). then change the plugs. Yes- anti-seize.


Autolite has a really great rebate on right now for plugs; $3 back per plug for the iridium plugs! I got mine at RockAuto for cheap, and then with the rebate they were dirt cheap!


PS - 150k miles on plugs my butt; your salesman is an idiot!

 

Maybe the idiot (sorry) salesman meant 150km.

 

 

Possible? Yes.
Probable? No.
The OP mentioned "miles" more than once. I have to think the salesman was also ...

IIRC in some of the older manuals it was 100k miles. But with the newer 7.5k mile maintenance cycle interval, it fell to 97.5k miles; otherwise it would have gone to 105k miles ....

 

I was actually being sarcastic.

 

Yeah - I got it. I was just clarifying.
Your humor is not lost on me!
Sarcastic wit is my forte!

 

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Thanks for the help guys, ordered some (16) plugs. The dealer did certify this used truck and gave me a year warranty and still have the remainder of the 100k powertrain. Going to stick with motorcraft plugs to avoid any potential warranty issues for now. I did read the 97k mile change in the book yesterday. Hopefully plugs solve the ever so slight intermittent vibration change in the cab. I didn't noticed it until yesterday. Maybe some seafoam will help. Or maybe it's normal, I haven't ever been around the 6.2 before. Had a v10 years ago that you could set a cup of coffee on. I'll check out the older SD pages, Thanks again!

 

146k on my '12, boots are failing but otherwise OK. Gonna change boots and plugs now, seems a waste of good plugs.😊