Reddit reviews Denso 671-4061 Original Equipment Replacement Wires

Yup, those are definitely things I would recommend. The plugs you can do in 5 mins. Ford uses double platinum plugs stock. You can either get the Motorcraft or the Autolite double platinum and they'll work great and are pretty cheap. I bought the Autolite at Advanced for like $15 two years ago and they work great. While you're at it, I'd also recommend you change the plug cables. Denso make the plugs for Ford, so you can get the original part directly through them for cheaper.

http://smile.amazon.com/Denso-671-4061-Original-Equipment-Replacement/dp/B000EQB36A?ie=UTF8&psc=1&redirect=true&ref_=oh_aui_search_detailpage

Oil you can use high-mileage or synthetic. I prefer to use synthetic because it's higher quality, protects the engine better and it's either a bit cheaper or the same cost-wise. I change mine every 6K miles and just pick out whatever 5W-30 full synthetic with filter they have at Advanced. It's usually $20 or $25, while conventional high-mileage is $18-21 but that you should change every 4K or so so it's not actually cheaper.

You should definitely change the brake discs. You could buy the original but good quality replacements can also be had like ACDelco or Raybestos.

The water pump... well I'll be honest, mine has the original one. The water pump typically doesn't fail or leak on these. Mine hasn't leaked any coolant at all and the original radiator seems to be holding up fine too. If you wanna replace it as a preventative measure you could and it's easier than most cars because it's not connected to the belt. It's a 1 hour job if you're experienced, around 2 if not.

I would definitely, definitely recommend you do the valve cover gasket and rear dogbone control arm if they haven't been done. Do not use any silicone on the valve cover. Reason why it's important to change is because the rubber breaks and engine oil will start leaking into the plugs, fouling them and if it's bad enough can cause the car to misfire. Change them every 60K or so. That rear control arm is very important too because it has to do with rear tire wear. That control arm is the one that sets the rear camber of the car, and at around 100K miles the rubber breaks and you'll be able to notice because of the rear camber. Tires will last 1/3 of what they should unless you replace it. It has independent rear suspension which is great for handling, but it also causes that.

http://smile.amazon.com/Dorman-521-416-Control-Arm/dp/B004AIS1R2/ref=sr_1_2?s=automotive&ie=UTF8&qid=1462747313&vehicle=2001-54-679-49--1-8-5-3458--1-1-747--2-0&sr=1-2&ymm=2001%3Aford%3Afocus

Any car with that mileage you should check the front and rear shocks. The rear are super easy to do. I followed a video and did it in 10 mins total. The front are a bit tricky so those take around an hour. If you want it to ride like stock use Monroe, if you want a bit sportier/stiffer use KYB.