Ford F-150 5.0L Coyote Burns Oil — Owners Sue Over Hidden Defect

America’s best-selling truck is supposed to be “Built Ford Tough.” Owners of 2018–2020 Ford F-150 trucks equipped with the 5.0-liter Coyote V8 say it is anything but. Their engines consume oil at rates that drain the crankcase before the next scheduled oil change — sometimes losing a quart every 500 to 1,000 miles with no visible leak. Two class action lawsuits, the most recent filed in August 2025, allege Ford Motor Company knew about this defect since at least August 2018, concealed it from buyers, and issued a technical service bulletin critics call a cover-up rather than a real fix.

The lead active case, Bryan, et al. v. Ford Motor Company, Case No. 2:25-cv-12714, was filed on August 28, 2025, in the U.S. District Court for the Eastern District of Michigan. It follows a 2021 lawsuit — Lyman, et al. v. Ford Motor Company, Case No. 2:21-cv-10024 — filed in the same court and still working through the system. Together, they represent over four years of continuous litigation over what plaintiffs call a fundamental engineering failure in one of Ford’s most popular and profitable powertrains.

Ford F-150 Oil Consumption Lawsuit Timeline and Updates

August 2018 — Ford’s Own Records Reveal the Problem

Plaintiffs allege Ford had internal knowledge of the excessive oil consumption problem in the 5.0L Coyote engine by August 2018 — the same year the third-generation Coyote launched in the F-150. The engine represented a significant redesign: Ford switched from traditional cast-iron cylinder liners to Plasma Transfer Wire Arc (PTWA) cylinder liners, a weight-saving technology that coats the aluminum cylinder walls with a sprayed metal alloy layer instead of inserting a separate iron sleeve.

Owner complaints began accumulating almost immediately. NHTSA received more than 4,000 complaints related to F-150 oil consumption between 2015 and 2025, with the volume spiking sharply after 2018. Ford’s internal warranty and service records, dealer reports, and NHTSA complaint data all, according to plaintiffs, gave the company notice of a systemic problem it did not disclose to buyers.

2018–2019 — Multiple Technical Service Bulletins Issued

Ford issued its first internal acknowledgment of the problem through a Technical Service Bulletin in 2018. That was followed by TSB 19-2338, which addressed excessive oil consumption in 2018–2019 F-150 models with the 5.0L engine. Both bulletins went to Ford dealerships — not to consumers.

The bulletin attributed the excessive consumption to high intake manifold vacuum during deceleration fuel shut-off (DFSO) events. When a driver lifts off the throttle at highway speed, the throttle plate closes, creating intense vacuum that pulls oil past piston rings, through valve guides, and through the positive crankcase ventilation (PCV) system into the combustion chamber — where it burns off instead of returning to the oil pan.

December 2019 — Ford Issues TSB 19-2365 — the Alleged Cover-Up

In December 2019, Ford issued Technical Service Bulletin 19-2365, superseding TSB 19-2338 and expanding coverage to 2018–2020 F-150 models with 5.0L engines. The bulletin acknowledged that some trucks “may exhibit excessive oil consumption of greater than 1L (1 quart) in 4,800 km (3,000 mi) with no visible oil leaks.”

The prescribed fix had three components: reprogram the Powertrain Control Module (PCM) to keep the throttle plate slightly open during deceleration, install a new engine oil level indicator, and change the oil and filter. That new oil level indicator is where plaintiffs say the cover-up began. The revised dipstick expanded the “normal” operating range from 1 quart to 2 quarts — meaning a truck that had consumed a full quart would still show as acceptable on the new stick. Plaintiffs allege Ford lowered the minimum fill standard to hide the defect rather than fix it.

January 8, 2021 — First U.S. Class Action Filed

Law firms Cohen Milstein Sellers and Toll PLLC, Sauder Schelkopf LLC, Handley Farah and Anderson PLLC, and Baron and Herskowitz filed the first major U.S. class action, Lyman, et al. v. Ford Motor Company, in the Eastern District of Michigan on January 8, 2021. The case covered 2018–2020 Ford F-150 trucks with 5.0L engines.

The complaint alleged Ford violated the Magnuson-Moss Warranty Act, breached express and implied warranties, and committed fraudulent concealment. On March 22, 2022, Judge Gerschwin A. Drain appointed Douglas J. McNamara to the Plaintiffs Steering Committee. That case remains active as of 2026 — more than five years after filing.

August 28, 2025 — Second Class Action Filed by 12 Plaintiffs

With the 2021 case still unresolved, a new group of 12 named plaintiffs from nine states filed Bryan, et al. v. Ford Motor Company on August 28, 2025, also in the Eastern District of Michigan. The lead plaintiff, Daniel Bryan of Kansas, owns a 2019 Ford F-150. The full plaintiff roster spans Alabama, California, Florida, Kansas, Kentucky, Michigan, Mississippi, Missouri, and Rhode Island.

The Bryan case is represented by The Miller Law Firm, P.C., Sauder Schelkopf LLC, Cohen Milstein Sellers and Toll PLLC, Handley Farah and Anderson PLLC, Baron and Herskowitz, and Gordon and Partners, PA. Several of the same firms litigated the 2021 case — a sign that the earlier lawsuit’s progress justified a parallel second filing with additional plaintiffs and updated allegations.

2026 — Discovery Phase, Preliminary Settlements Reported

As of early 2026, the Bryan case has moved into a critical discovery phase. This is the stage where plaintiffs’ attorneys gain access to Ford’s internal engineering documents, design specifications, warranty claim data, and communications about the Coyote oil consumption problem. Plaintiffs allege Ford’s internal records will show engineers flagged the oil consumption issue before the 2018 model year launched — meaning the defect was knowable, and concealed, from the start.

Some preliminary settlement agreements covering certain model years were reported in late 2025, awaiting final court approval in the first half of 2026. No nationwide settlement covering all affected owners has been reached. The Lyman case from 2021 remains active alongside the newer Bryan litigation.

The Engineering Defect — What Plaintiffs Say Is Actually Wrong

The 2018 Coyote was Ford’s most ambitious redesign of the platform. The switch to PTWA cylinder liners — where a plasma arc sprays a hardened metal alloy directly onto the aluminum cylinder walls — eliminated cast-iron liners entirely and reduced engine weight. Ford marketed the 2018–2020 F-150 as “reengineered,” “upgraded,” and featuring “the most advanced F-150 engine lineup ever.”

Plaintiffs and independent engineers identify three compounding failure mechanisms in the third-generation Coyote:

The three mechanisms compound each other. A degraded PTWA liner means rings cannot seal even at idle. Low ring tension worsens the seal failure during normal driving. The vacuum spike during highway deceleration then pulls whatever oil the degraded seals failed to contain directly into combustion. Owners report losing a quart every 500 to 1,500 miles on otherwise well-maintained trucks — rates that the F-150 owner’s manual, with its recommended oil change intervals of up to 10,000 miles, never prepared them for.

The owner’s manual states the oil change indicator may illuminate as early as 3,000 miles after the previous change, but recommends no change interval exceed 10,000 miles or one year. For a truck consuming a quart every 1,000 miles, following the manual means running the engine with critically low oil pressure long before the indicator ever lights up. The lawsuit argues the manual itself is defective because Ford wrote it knowing the engine could not maintain proper oil levels across the intervals it described.

What Ford Did — and What Plaintiffs Say It Was Hiding

Ford’s response to the oil consumption problem followed a pattern plaintiffs call deliberate concealment. No recall was issued. No consumer notification went out. No buyback program was announced. Instead, Ford issued technical service bulletins directed at dealerships — documents consumers rarely see unless they specifically request them.

TSB 19-2365, issued in December 2019, is the crux of the concealment allegation. The bulletin prescribed three changes. The PCM reprogramming — keeping the throttle plate slightly open during deceleration — addressed the vacuum spike mechanism and reportedly resolved the issue for roughly 90% of affected vehicles. But for the remaining 10%, the fix did nothing because their engines had progressed to physical cylinder wall scoring from sustained ring seal failure.

What matters here is the revised dipstick. Ford’s new oil level indicator expanded the “acceptable” range from a 1-quart window to a 2-quart window. A truck that had burned through a full quart since its last oil change would now show as within the acceptable range on the new stick. Plaintiffs allege Ford designed the new dipstick to reclassify dangerous oil consumption as normal — not to protect engines, but to protect Ford from warranty claims. By widening what counted as “acceptable,” Ford could deny warranty repairs to owners whose trucks showed consumption within the new expanded range.

The lawsuit alleges dealers followed suit. When owners brought in F-150s with oil consumption complaints, dealers would check the new dipstick, find the level still within the 2-quart range, and tell owners nothing was wrong. Engine wear continued. The warranty clock ran. When powertrain warranties expired — typically at 60,000 miles or five years — Ford’s exposure ended and owners were left with a truck that now required a $10,000–$12,000 engine replacement out of pocket.

Who Qualifies and What Damages Are Available

The class as defined in the complaints covers owners and lessees of 2018–2020 Ford F-150 trucks equipped with the 5.0L Coyote V8 engine. The states covered in the most recent filing include California, Michigan, Florida, Kentucky, Kansas, Mississippi, Missouri, Alabama, and Rhode Island — with potential expansion to additional states as litigation develops.

Damages sought include compensation for out-of-pocket oil costs, engine repair and replacement expenses, diminished resale value, and injunctive relief requiring Ford to properly repair or replace affected engines. Some owners with documented engine failure report receiving over $10,000 in individual cases. Class-wide average payouts in auto defect settlements typically run $500–$3,500 per claimant depending on documented harm, though the final range will depend heavily on whether the case settles or proceeds to trial.

Owners who have already had repairs performed under warranty may still be eligible if Ford’s remedy was insufficient. Owners whose trucks are now out of warranty but within the statute of limitations window — typically three to six years under state consumer protection laws — should document their oil consumption and contact plaintiffs’ counsel.

What Ford’s Own Documents May Reveal in Discovery

The 2026 discovery phase is where the fraudulent concealment claim lives or dies. Plaintiffs allege Ford’s internal engineering documents will show that the company’s own engineers identified oil consumption problems before the 2018 model year launched commercially.

The timeline the plaintiffs construct is damaging if the documents support it. Ford knew in August 2018. Ford issued dealer-only TSBs in 2018 and 2019. Ford’s solution included a revised dipstick that widened what counted as acceptable rather than actually reducing consumption. Ford did not tell buyers. Ford did not recall the vehicles. And when owners came to dealers with complaints, many were turned away — told their consumption was within spec on a spec that Ford had quietly revised to make the defect disappear on paper.

This is precisely the pattern courts have found sufficient for fraudulent concealment claims in prior automotive defect litigation. Similar to the Toyota UA80 transmission lawsuit, where owners alleged Toyota denied warranty repairs for a known defect until warranties expired, the Ford Coyote case turns on whether internal documents show the company knew the defect was real, systemic, and material to a buyer’s purchase decision.

The Broader Coyote Problem — Beyond the 2018–2020 F-150

The lawsuits focus on 2018–2020 model years because that is where the third-generation Coyote with PTWA liners debuted. But owner complaints extend beyond those years. Owners of 2021 and later F-150s with 5.0L engines also report oil consumption issues, though Ford changed the recommended oil viscosity from 5W-20 to 5W-30 starting with the 2021 model year — a change that mitigated but did not eliminate complaints for some owners.

Ford Mustang owners with the same 5.0L Coyote engine have also reported oil consumption issues, though the F-150 applications appear more severe due to the higher load and towing demands placed on the truck platform compared to a performance car. The PTWA technology itself is not unique to Ford — it has been used across the automotive industry — but its implementation in the third-generation Coyote appears to have produced a specific failure mode that Ford’s TSBs addressed only partially.

Attorneys investigating the case have signaled potential expansion to newer model years and to EcoBoost engine variants that have also generated elevated NHTSA oil consumption complaints. That expansion, if it materializes, would dramatically broaden the affected class and Ford’s potential liability exposure.

What This Lawsuit Teaches Consumers

The Ford F-150 oil consumption case teaches a lesson about the difference between a warranty and protection. Ford offered a 5-year/60,000-mile powertrain warranty on these trucks. On paper, that warranty should have covered the oil consumption defect. In practice, plaintiffs allege Ford used a revised dipstick and dealer-level denial to keep consumption claims out of the warranty system until the warranty expired — at which point the same owners who had been told their consumption was “within spec” suddenly faced engine replacement bills that started at $10,000.

The lesson for truck buyers is blunt. A warranty is only as good as the automaker’s willingness to honor it. When a manufacturer issues a technical service bulletin to dealers — but not to consumers — about a defect it acknowledges internally, and when that same manufacturer revises its dipstick to reclassify dangerous consumption as normal, the warranty has been engineered to expire before the defect is officially acknowledged. The consumer bears the cost.

Document everything. Check your oil level — not just at oil changes but between them. If your F-150 5.0L is losing more than a quart per 3,000 miles, log every top-off. Request that dealers record your complaints in writing, with dates and mileage. Keep all service records. That documentation is what separates a potential class member from someone who cannot prove their consumption exceeded what Ford claimed was normal. In a case where Ford’s own revised dipstick is the centerpiece of the concealment allegation, consumer-level evidence of what actually happened in the real world may be the most powerful evidence in the courtroom.

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