Looking to do a little preventive maintenance on my new to me 2015 F150 XLT 5.0 SCrew w/64k miles. I’ve had it for just over a month now and it’s been running great, no issues. Really clean truck inside and out. It’s my first Ford product and first truck at that. Reading through the forum here I learned about engine hours and noticed my were a bit high. I’ve got 2700 total hours and 1080 idle hours, so truck was idled more than normal. The carfax shows that the truck had regular oil changes, so at least there’s that 😂 Like I said though, the truck runs great. I’ll be changing out all my fluids over the next 6 months but was wondering about plugs. I’m getting decent mpg’s and nothing seems off. My question is, should I hold off on those for now? What symptoms would I get to indicate its time to change the plugs? Would appreciate any info!

 

You should put another 64K miles on before looking at you spark plugs. I would change the brake fluid now though. People seem not to think about the brake fluid but it does collect water and does detiriate with time.

 

Plugs aren't that expensive, so I would go ahead and change them. I would never wait till 100K
I plan to change mine at 60K

 

Umm, no, definitely not. These engines are notoriously hard on plugs, even stock. Mine were already starting to have gap issues at 49K when I swapped them. At about 7 bucks a plug for MC, it's pretty cheap to do.

 

If you change plugs / coils, I'd stick with true oem. I've seen many posts about aftermarket junk. I plan to do many things as you when I get to 60k miles. I've seen many threads on this Forum, and in the back of my mind many of the failures might be better off had they done maintenance more rather than less often. I hope to get 150k miles out of my 2020.

 

How hard is it to do plugs on these trucks?

 

I’m the same way, hoping for at least 150k miles but I’ll take more!

 

I’v watched a few youtube videos about it, seems pretty straight forward. Looks like getting the electrical disconnector off is the hardest part.

 

Including checking/setting gaps, I can do a 3.5EB in less than an hour with a basic socket set, gap setter/feeler gauge, etc. They are dead simple. The most complicated part is needing to drop the socket and short extension down the back, then connect the long extension. Observe proper torque values, don't get in a rush, don't cross-thread, and don't use antiseize.

 

Don’t use antiseize? I thought that was recommended?

What gap does Ford use for the plugs?