Ford F-150 2015–2020 · Maintenance schedule & cost to own

The oil-life monitor decides when, and it drops fast with towing or short trips — anywhere from 3,000 to 10,000 miles depending on how you drive. EcoBoost engines take 5W-30; the V6s and the 5.0 V8 take 5W-20. Capacity runs 6 to 8.8 quarts, so check yours before buying.

The 2018–2020 3.0L Power Stroke is the one engine here with real published mileages instead of a monitor, and Ford states them as ranges with a separate never-exceed cap: 7,500–10,000 miles under normal driving (do not exceed 10,000 miles or 12 months), 5,000–7,500 with moderate towing and periods of idling (do not exceed 7,500 miles or 6 months), and 3,000–5,000 under heavy towing and extended idling (do not exceed 5,000 miles or 3 months). Those upper figures are ceilings, not the recommendation — plan on the bottom of whichever column you actually live in, which for most people who bought a diesel half-ton to tow means 5,000 miles. The oil itself changes with the duty, not just the interval: 5W-30 meeting API FA-4 (Ford WSS-M2C214-B1) for normal running, but 5W-40 meeting API CK-4 when towing — a different oil, not a thicker version of the same one. Capacity is 6.5 quarts and the filter is a Motorcraft FL-2081 cartridge (Ford JL3Z-6731-A) — not the FL-500S spin-on the gas engines use and not the 2.7L's cartridge either, so neither oil-filter entry on the parts desk covers this engine. Diesel-spec FA-4/CK-4 oil costs meaningfully more per quart than the gas engines' 5W-20/5W-30, which is why this is priced as its own line rather than averaged into one misleading number.

Ford's own consumer guidance calls for inspecting the engine air filter every 15,000 miles under severe/dusty conditions — short trips, heavy-traffic idling, dust, job-site or wildfire-smoke exposure — versus a 30,000-mile replacement interval on the normal schedule. Most daily truck use (work sites, towing, stop-and-go) qualifies as severe by Ford's own definition, so default to the 15k check; this is roughly the second inspection cycle by 30,000 miles, not the first. One panel filter is shared across the 2.7L/3.5L EcoBoost and 5.0L V8 gas engines and the 3.0L diesel.

Ford's normal-schedule interval for the cabin air filter is 20,000 miles (some model-year manuals round this to 20,000–25,000 miles or annually). No distinct numeric severe interval is published for it the way the engine air filter has one — Ford's guidance is simply 'inspect and replace more often' in dusty conditions — so treat 20,000 miles as a ceiling, not a target, if you're in stop-and-go or dusty driving.

Ford's own schedule lists transmission (plus front/rear axle and transfer case) fluid at 150,000 miles for normal use, but severe conditions — towing, plowing, heavy payload, extended idling, or fleet/commercial use — pull that down hard. Sources tied to Ford's severe chart put the 10-speed 10R80 at roughly 60,000 miles under towing/severe use; owner-forum reporting on the 6-speed 6R80 points the same direction, though a distinct published severe number specifically for the 6R80 wasn't found. Given how many F-150s actually tow or haul, default to the 60k severe cadence rather than assume the 150k confirmed-light-duty number applies. Fluid spec differs by transmission — Mercon LV for the 6R80, Mercon ULV for the 10R80 — so match the fluid to the transmission code, not just 'ATF.'

The turbocharged EcoBoost engines (2.7L and both generations of the 3.5L) run a shorter factory plug interval than the naturally aspirated engines in this lineup — 60,000 miles versus 100,000 — because boost and higher cylinder pressure work the plugs harder. It's also a bigger job than a typical plug swap: the rear bank on the 3.5L in particular sits under intake and turbo plumbing that has to come off to get at it, which is most of why the labor cost below runs higher than the naturally aspirated plug job at the 100k bucket.

Ford didn't put brake fluid on this generation's official scheduled-maintenance chart until the 2020 model year, the tail end of this generation's run — 2015–2019 trucks have no factory mileage number to point to at all, not even a normal-vs-severe split. That's not the same as 'it doesn't need it': brake fluid pulls moisture from the air regardless of what the manual tracks, and it degrades on a calendar as much as a mileage clock. Use the industry-standard 2–3 year / ~30,000-mile ceiling until the truck reaches 2020-model-year territory, where Ford's own schedule finally picks it up.

One main accessory belt runs the alternator and A/C compressor (and power steering on hydraulic-assist trucks); EcoBoost trucks add a second, shorter stretch belt for the A/C. This is a wear item, not a fixed Ford mileage interval — inspect for cracking, glazing, or rib wear starting around 60,000 miles and replace before it lets go and strands the truck. Belt length and part number differ by engine (see parts cross-reference), so match the belt to the specific engine, not just 'F-150.'

Wear-based, not a fixed manufacturer mileage — but a half-ton truck that's actually hauling or towing works its front brakes harder than a car does, so first replacement commonly lands earlier than typical car numbers, often in the 30,000–60,000-mile range. Inspect at this point rather than assume; a truck driven light-duty and unloaded can stretch well past it.

Ford doesn't publish a fixed replacement mileage for shocks/struts — this is wear-based. A commonly cited working range is 50,000–100,000 miles, sooner if the truck sees off-road use or regularly runs loaded/towing, both of which accelerate wear past what a commuter-only truck sees. The interaction that matters: worn shocks/struts cause uneven, cupped tire wear on their own, independent of anything happening with the alignment — a shop that blames 'alignment' for cupped tread without checking the shocks first is chasing the wrong cause. Budget a wheel alignment (below) right after replacing either end. Unlike some vehicles in this catalog, this generation's documented failure list doesn't include a suspension, alignment, or tire-wear defect — the wear described here is ordinary truck-duty wear (payload, towing, unpaved miles), not a factory issue.

Applies only to 4WD trucks — 2WD F-150s have no driven front axle, so there's nothing here to wear. The rubber boots sealing grease into the front CV joints are a wear item with no fixed factory interval; once a boot tears, grease escapes and dirt/water gets in, and the joint itself is usually on a countdown from there — which is why shops typically replace the whole axle assembly rather than just the boot. Start inspecting around 60,000 miles or 5 years, with full-assembly replacement typically needed somewhere in the 80,000–130,000-mile range. A torn boot flinging grease near the front brakes is also worth checking for if you notice a sudden pull or noise from one wheel — contaminated pads or a rotor don't brake the same on one side as the other.

Wear-based, generic range roughly 70,000–120,000 miles on decent roads, shorter — 50,000–80,000 — on rough roads, in harsh climates, or on trucks that see a lot of unpaved driving; bushings also age out on their own after 8–10 years even on a low-mileage truck, since rubber degrades on a calendar as much as a mileage clock. The interaction that costs people real money: worn bushings let the control arm move under load, so an alignment done before the bushings are replaced won't hold — you end up paying for the alignment twice if you do the bushings afterward instead of first.

The naturally aspirated engines in this lineup — the 5.0L Coyote V8, the 3.3L Ti-VCT base V6, and the pre-2018 3.5L Ti-VCT V6 — run Ford's longer 100,000-mile factory plug interval, unlike the turbocharged EcoBoost engines at 60,000 miles. Access is simpler too (no turbo plumbing in the way), which is most of why this job costs less than the EcoBoost version above even though it's fundamentally the same task.

Ford's normal-schedule first coolant drain/flush/refill on this generation is 100,000 miles or 6 years, whichever comes first — noticeably longer than many older platforms because Ford's long-life orange coolant is rated for it. No distinct severe-condition number is published for coolant on this generation; towing and hot-climate use add heat-cycling stress that the mileage number alone doesn't capture, so don't assume a truck that tows a lot is fine waiting the full 100k just because the odometer says so.

Repeat cadence from the 60k bucket if you're on the severe schedule — roughly every 60,000 miles going forward for a truck that tows or hauls regularly. If you've genuinely confirmed light-duty use and followed Ford's 150,000-mile normal schedule instead, this is your first service, not a repeat.

Repeat cadence from the first 100k service — Ford's normal schedule calls for this roughly every 50,000 miles/5 years going forward from the initial 100k/6-year service, not a one-time event.

This is the one real exception to 'nothing in this lineup needs scheduled timing service.' Every gas engine here (2.7L/3.5L EcoBoost, 5.0L Coyote, 3.3L/3.5L Ti-VCT) is chain-driven with no scheduled timing service — confirmed via parts catalogs and owner documentation, and consistent with how Ford's modular/EcoBoost family has run since the 2011 refresh. The 3.0L Power Stroke diesel (2018–2020) is the outlier: it's built on a Jaguar Land Rover-derived V6 architecture that uses front AND rear timing belts — driving the camshafts and the high-pressure fuel pump — instead of a chain, and Ford's factory interval is 150,000 miles. Assuming 'trucks don't have timing belts' is exactly the wrong call on this specific engine; a snapped belt on an interference diesel means a wrecked engine, not an inconvenience. One owner reported a dealer quote north of $1,800 for belt-related work on a 2019 3.0L; the range below reflects independent-shop pricing for the full front-and-rear belt service (labor-heavy, engine-out or close to it on some shops' procedure).

Not a fixed Ford mileage item — this is event-triggered plus a periodic check. Get one any time you replace tires, shocks/struts, or control-arm bushings (all above) — skipping it wastes part of the money you just spent on whichever of those jobs you did, since a freshly installed part just wears or rides wrong again if the geometry underneath it is off. On top of that, a periodic check roughly every 12,000 miles or once a year is reasonable for normal driving; tighten that to every 6,000 miles if the truck regularly tows, goes off-road, or rides on a lift. Most F-150s only need a 2-wheel front alignment, since the solid rear axle on this generation doesn't have adjustable rear geometry — that keeps the cost down versus a 4-wheel check on an independent-suspension vehicle.

This generation spans everything from a 2WD XL work truck to a 4WD Raptor, and the right tire is different for each — there's no single answer. A highway all-season tire is the right call for a mostly-commuting, unloaded truck: better wet and wintry grip, quieter, longer tread life than anything more aggressive, with no towing/off-road capability lost because there isn't any use to protect. A truck that tows near its rated capacity needs LT-construction tires with reinforced sidewalls and a real load rating, not a P-metric passenger tire — that's a load-capacity difference, not a comfort preference. A 4WD truck genuinely used off-pavement (FX4 package, regular unpaved-road or trail driving) is the actual case for an all-terrain tire. The mismatch to avoid in either direction: an aggressive all-terrain or mud-terrain tire on a truck that only ever sees pavement wears faster, is noisier, and gives up wet/wintry stopping distance for off-road capability that's never used; running highway all-season tires while regularly towing near GVWR risks a sidewall failure the tire was never rated to handle. On 4WD trucks specifically: this generation's 4WD is NOT full-time AWD — most 4WD-equipped trims default to 2H (rear-drive only, front axle not spinning) for daily driving, with 4H/4L as driver-selected, locked, part-time modes explicitly not meant for dry pavement, and some trims add a clutch-based '4A' auto mode that tolerates some front/rear speed difference and is Ford-rated safe for on-road use. Mismatched tire circumference (a new tire next to a badly worn one, or a different brand/model on one axle) risks binding the driveline and stressing the transfer case specifically when 4H/4L is actually locked in on a hard-traction surface — owner consensus is blunt about needing matched size and tread wear across all four before doing that. If the truck spends its life in 2H or defaults to 4A, this is a much smaller concern than it would be on a full-time AWD car; if it's a truck that actually gets run in 4H/4L (mud, snow, towing recovery), keep tread depth matched via regular rotation rather than assuming it doesn't apply here.

Battery life is a calendar item, not a mileage one — average service life is 3–5 years regardless of how many miles were driven in that time, the same logic as replacing something on age even on a low-mileage truck. Standing guidance: load-test starting around year 3, and replace proactively by year 5 rather than waiting for a no-start, since a battery on its way out tends to fail without much warning (often on the first genuinely cold morning). Get the size and rating right — this generation runs a BCI Group 48 (H6, ~760 CCA) on most trims, Group 94R (H7, ~800 CCA) on upper trims (King Ranch/Lariat/Platinum) and heavier-electrical builds, and Group 49/H8 (~850 CCA) on the 2019+ 3.0L Power Stroke diesel; installing the wrong group size can physically not fit the tray or clamp, and under-rating the CCA leaves a diesel or a heavily-optioned truck marginal in cold weather. On the diesel and on trucks built for towing/plowing, also check whether a heavier-duty alternator is fitted — Ford offered 200A/240A high-output alternator options aimed at plow-prep and upfitter-switch-equipped trucks. A factory-standard dual-battery configuration wasn't confirmed for this generation of F-150 the way it's common on diesel Super Duty trucks, but plenty of F-150s pick one up aftermarket for winch/plow/upfit equipment; if a truck has one, replace both batteries as a pair, not one at a time, since a weaker old battery drags down a fresh one sharing the same circuit. One retailer-quality question this can't settle: some independent battery dealers claim big-box retailers (Costco is the common example) stock a different, lower-tier SKU of the same brand than an independent shop carries. That claim is contested and isn't settled by clean two-source corroboration either way — this ledger isn't taking a side on it. What IS real and worth comparing before you buy: warranty terms genuinely differ by retailer even within the same battery brand — Costco's Interstate batteries, for example, carry a documented 36-month prorated warranty, and terms (length, free-replacement vs. prorated) vary elsewhere. Compare the warranty paperwork, not brand-quality rumors.