United States Court of Appeals

For the Eighth Circuit

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No. 21-2698

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Michael Tucker and Robert Riddell

lllllllllllllllllllllPlaintiffs - Appellants

v.

General Motors LLC

lllllllllllllllllllllDefendant - Appellee

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Appeal from United States District Court 

for the Eastern District of Missouri - Cape Girardeau

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Submitted: September 21, 2022

Filed: January 19, 2023

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Before LOKEN, ARNOLD, and KOBES, Circuit Judges. 

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LOKEN, Circuit Judge.

General Motors (“GM”) installed Generation IV 5.3 Liter V8 Vortec 5300 LC9

engines (“Gen IV engine”) in seven different GMC and Chevrolet trucks and SUVs

in model years 2010 to 2014 (the “affected vehicles”). In 2016, representatives from

various States filed a putative class action in the Northern District of California

alleging that the affected vehicles contain a defect that causes excess oil consumption
and other engine damage (the “oil consumption defect”). Siquieros v. General

Motors LLC, No. 16-CV-07244-EMC (N.D. Cal.). The District Judge in that case

entered an order prohibiting additional non-California plaintiffs from joining. 

Michael Tucker and Robert Riddell then filed this putative diversity class action in

the Eastern District of Missouri asserting various claims against GM for failing to

disclose the oil consumption defect to Missouri purchasers. 

The 75-page Class Action Complaint asserted claims for violation of the

Missouri Merchandising Practice Act (“MMPA”), see Mo. Rev. Stat. §§ 407.020,

407.025(1); breach of express and implied warranty; fraudulent omission; and unjust

enrichment. GM moved to dismiss all claims. See Fed. R. Civ. P. 12(b)(6). The

district court granted the motion in a 17-page Memorandum and Order. Tucker v.

Gen. Motors LLC, No. 1:20-CV-254-SNLJ, 2021 WL 2665761 (E.D. Mo. June 29,

2021). Plaintiffs appeal only the dismissal of their MMPA claim, stating that “the

sole issue present[ed] on appeal is whether the district court improperly applied the

concept of puffery to [their] deceptive omissions claims under the [MMPA].” We

review de novo the grant of a motion to dismiss MMPA claims. Schulte v. Conopco,

Inc., 997 F.3d 823, 825 (8th Cir. 2021). We conclude that advertising “puffery” does

not affect an MMPA claim based on omission of a material fact, at least in this case,

and we agree that Plaintiffs’ Class Action Complaint “alleg[es] sufficient factual

matter, accepted as true, to state [an omissions] claim to relief that is plausible on its

face.” Kuhns v. Scottrade, Inc., 868 F.3d 711, 717 (8th Cir. 2017) (quotation

omitted). Accordingly, we reverse the dismissal of that claim. 

I.

Michael Tucker purchased a new GMC Sierra from Barley Automotive in Saint

Genevieve, Missouri in 2013. Robert Riddell purchased a new Chevrolet Silverado

from ELCO Chevrolet in Ballwin, Missouri in 2012. Before purchasing, Tucker and

Riddell spoke to sales representatives at the dealerships, viewed GM commercials

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promoting the purchased vehicles’ reliability and durability, and saw Monroney

stickers1 on the vehicles. After purchasing, Tucker and Riddell noticed their vehicles

were consuming excess oil when the odometers reached about 75,000 miles and

25,000 miles, respectively. They allege that the oil consumption defect is primarily

caused by piston rings that fail to keep oil in the crankcase. Besides damaging the

engine by accelerating wear and tear, they claim the oil consumption defect creates

safety risks, including overheating and sudden engine seizure. They allege that GM

knew of the oil consumption defect as early as 2008 but failed to disclose the defect

to Missouri purchasers. They would not have purchased the vehicles -- or at least

would have paid less for them -- had GM disclosed the oil consumption defect. 

The MMPA provides a private right of action to any person who sustains

ascertainable loss in connection with the purchase or lease of personal, family, or

household merchandise as a result of practices the MMPA declares unlawful. Mo.

Rev. Stat. § 407.025(1). Section 407.020(1) declares unlawful the use of “any

deception, fraud, false pretense, false promise, misrepresentation, unfair practice or

the concealment, suppression, or omission of any material fact in connection with the

sale or advertisement of any merchandise . . . .” Plaintiffs allege that GM “engaged

in unlawful conduct under the [MMPA] when it concealed, suppressed or omitted a

‘material fact’ in connection with the sale” of the affected vehicles. Hess v. Chase

Manhattan Bank, USA, N.A., 220 S.W.3d 758, 773 (Mo. banc 2007). 

The parties’ briefs to the district court regarding GM’s motion to dismiss

primarily debated Plaintiffs’ other claims, which are not at issue on appeal. Their

briefing of the MMPA issue was superficial at best. GM initially argued that

1Before delivering a new automobile, the manufacturer must place a sticker

(commonly referred to as a “Monroney sticker”) on the windshield or side window

containing information such as the suggested retail price, available safety ratings, and

EPA-mandated economy and environmental disclosures. See 15 U.S.C. §§ 1231-33;

49 C.F.R. § 575.401(e)(1). 

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Plaintiffs did not plead the elements of their MMPA claims with the requisite

specificity because allegations that GM misrepresented the affected vehicles in

marketing materials “are insufficient.” See Fed. R. Civ. P. 9(b). Plaintiffs responded

that GM omitted this serious safety defect in its advertising and promotion of the

affected vehicles. GM’s reply focused on the alleged Rule 9(b) insufficiencies. 

Neither party even attempted to state the elements of an MMPA omissions claim. In

granting GM’s motion to dismiss this claim, the district court explained:

[P]laintiffs allege defendant omitted the Oil Consumption Defect in

connection with its advertising, promotion, and sale of the Class

Vehicles. . . . But even if those general allegations could satisfy Rule

9(b)’s particularity requirement, it has been repeatedly held that

advertising constituting ‘mere puffery’ cannot form the basis of an

MMPA claim . . . . In the Anti-Lock Brake Products litigation, this

Court dismissed fraud claims against GM based on “national

advertisements, press releases and promotions” that alleged[ly] “created

a false impression that the [the vehicle’s antilock breaking system was]

‘safe and reliable.’” [In re Gen. Motor Corp. Anti-Lock Brake Prods.

Liab. Litig., 966 F. Supp. 1525, 1534 (E.D. Mo. 1997).] This Court held

that fraud could not be based on such statements because they were mere

“puffery.”

Tucker, 2021 WL 2665761, at *7.

II. 

To prove their MMPA claims, Tucker and Riddell must each show that he “(1)

purchased merchandise from [GM]; (2) for personal, family or household purposes;

and (3) suffered an ascertainable loss of money or property; (4) as a result of an act

declared unlawful under the [MMPA].” Vitello v. Natrol, LLC, 50 F.4th 689, 693

(8th Cir. 2022) (quotation omitted). Plaintiffs claim that GM committed an unlawful

act under the MMPA when it concealed, suppressed, or omitted a material fact -- the

oil consumption defect -- in connection with the sale of affected vehicles. “A claim

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is plausibly pleaded when its factual context allows the court to draw the reasonable

inference that [GM] is liable for the [omission] alleged.” Kuhns, 868 F.3d at 717

(quotation omitted). Sitting in diversity, we apply Missouri’s rules of statutory

construction in interpreting the MMPA. Behlmann v. Century Sur. Co., 794 F.3d

960, 963 (8th Cir. 2015); see Huffman v. Credit Union of Texas, 758 F.3d 963, 968

(8th Cir. 2014). 

The first element of this claim is the omission of a “material fact.” The

Missouri Code of State Regulations defines this term:

Material fact is any fact which a reasonable consumer would likely

consider to be important in making a purchasing decision, or which

would be likely to induce a person to manifest his/her assent, or which

the seller knows would be likely to induce a particular consumer to

manifest his/her assent, or which would be likely to induce a reasonable

consumer to act, respond or change his/her behavior in any substantial

manner.

15 Mo. C.S.R. § 60-9.010(1)(C). “This definition of material is broader than the

materiality requirement of common law fraud.” Hess, 220 S.W.3d at 773. Plaintiffs’

allegations that they would not have bought the affected vehicles, or would only have

bought them at a lower price, plausibly alleges that GM omitted a “material fact” that

resulted in Plaintiffs suffering an ascertainable loss. See, e.g., Plubell v. Merck &

Co., 289 S.W.3d 707, 714-15 (Mo. App. 2009). 

The second element of this claim, sometimes referred to as a scienter

requirement, limits liability for “[o]mission of a material fact” to “any failure by a

person to disclose material facts known to him/her, or upon reasonable inquiry would

be known to him/her.” 15 Mo. C.S.R. 60-9.110(3); see Hess, 220 S.W.3d at 774. 

Here, over 30 pages of the Class Action Complaint set forth specific allegations

relating to GM’s knowledge of oil consumption problems beginning in 2008 and

recounting many specific consumer complaints of the problem to GM. In Owen v.

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General Motors Corporation -- a class action alleging that GM “concealed and/or

omitted material facts . . . concerning [] defective windshield wiper control modules”

-- the Western District of Missouri denied a motion to dismiss these MMPA claims

because “[i]t is clear from the Complaint precisely what information the Owens allege

GM omitted and/or concealed.” No. 06-4067-CV-C-NKL, 2006 WL 2808632, at *7-

8 (W.D. Mo. Sept. 28, 2006);2

 accord In re Polaris Mktg., Sales Pracs., & Prods. Liab.

Litig., 364 F. Supp. 3d 976, 988 (D. Minn. 2019) (“Plaintiffs have adequately alleged

‘what’ was fraudulently omitted (i.e., the existence and details of the alleged engine

defect) [and] ‘why’ it was fraudulently omitted (i.e., to encourage sales).”). Likewise,

Plaintiffs have plausibly alleged this element of their omission claims. Plaintiffs are

not simply alleging that GM should have told them that the vehicles they were

purchasing had been the subject of consumer complaints, which would “impose an

impossible duty on vendors of commercial products.” Wright v. Bath & Body Works

Direct, Inc., No. 12-00099-CV-W-DW, 2012 WL 12088132, at *3 (W.D. Mo. Oct.

17, 2012).

The remaining element of an MMPA omission claim is that the omitted fact,

to be material, must be a “fact which a reasonable consumer would likely consider to

be important in making a purchasing decision.” 15 Mo. C.S.R. § 60-9.010(1)(C). It

is here that the “puffery” dispute needs to be focused. Twenty one paragraphs of 

Factual Allegations in the Class Action Complaint (¶¶ 159-179) alleged ways in

which GM “trumpeted the performance” of the Gen IV engines and the affected

vehicles. Count I of the Claims for Relief alleged violations of the MMPA; Count IV

2After denying GM’s motion to dismiss the MMPA omission claim, the district

court granted GM summary judgment dismissing the claim, and we affirmed, because

the plaintiffs failed to show “that the Owens’ vehicle in fact suffered that defect . . .

in order to demonstrate an ascertainable loss as a result of GM’s failure to disclose

the defect.” Owen v. General Motors Corp., 533 F.3d 913, 922 (8th Cir. 2008)

(alteration in original). 

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alleged a claim of common law Fraudulent Omission under Missouri law;3

 both

counts incorporated all 206 paragraphs of Factual Allegations. As the district court

recognized, fraudulent misrepresentation claims, no doubt including MMPA fraud

claims, may not be based on affirmative statements that are merely exaggerated

boasting or highly subjective claims of product superiority because “[p]uffery and

statements of fact are mutually exclusive.” Am. Italian Pasta Co. v. New World Pasta

Co., 371 F.3d 387, 391 (8th Cir. 2004). However, Plaintiffs do not base their MMPA

omission claims on affirmative statements in GM’s referenced marketing materials. 

Rather, those allegations, and the allegations of Plaintiffs’ research and conversations

with dealership employees before purchasing, are relevant only to show that each was

a “reasonable consumer . . . making a purchasing decision.” Because the alleged oil

consumption defect concerned the inner workings of a complex machine that the

average consumer would be unlikely to know or be able to research, we conclude

these allegations are sufficient to plausibly plead this element of Plaintiffs’ MMPA

omission claims. 

GM asserts that Plaintiffs’ MMPA material omission claim must be tied to an

actionable affirmative statement by GM to survive Rule 12(b)(6) dismissal. We

disagree. The plain language of the statute -- “any . . . concealment, suppression, or

omission” -- dispels the notion that this unlawful practice requires an affirmative

statement. When dealing with MMPA claims of omission or concealment of a

material fact, Missouri courts have consistently ruled that this claim “plainly requires

less proof than was required to prove the comparable elements of [a] common law

fraud claim.” Hess, 220 S.W.3d at 774; see Hope v. Nissan N. Am., Inc., 353 S.W.3d

68, 84-85 (Mo. App. 2011); Budach v. NIBCO, Inc., No. 2:14-CV-04324, 2015 WL

3853298, at *8 (W.D. Mo. June 22, 2015).

3The district court dismissed Count IV as barred by the economic loss doctrine

under Missouri law. Plaintiffs have not appealed that ruling.

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Alternatively, GM urges us to affirm the dismissal of this claim because

Plaintiffs failed to “state with particularity circumstances constituting fraud or

mistake.” Fed. R. Civ. P. 9(b). The district court discussed this issue but did not

decide it at the Rule 12(b)(6) pleading stage. Neither will we. 

III.

For the foregoing reasons, we conclude that Plaintiffs plausibly stated claims

that GM violated the MMPA when it failed to disclose a material fact -- the oil

consumption defect -- when selling each of them an affected vehicle. Accordingly,

we reverse the district court’s dismissal of these MMPA claims. We address no other

issue. Rather, we remand for further proceedings not inconsistent with this opinion.

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