In an era dominated by news of rapidly accelerating electrification, a quiet corner of the automotive market continues to utilize a different kind of alternative energy. For the 2026 model year, General Motors (GM) has renewed its commitment to FlexFuel, which offers a compelling blend of high-octane performance and agricultural sustainability.
While many manufacturers have phased out E85 compatibility in favor of hybrid or electric powertrains, GM’s strategy remains pragmatic: utilizing the existing internal combustion infrastructure to deliver enhanced performance to those who need it: owners of their heavy-duty trucks and popular small SUVs.
Understanding the implications of running high-ethanol blends like E85 (85% ethanol) or intermediate blends like E30 (30% ethanol) requires delving into the science of combustion, the sophistication of modern engine control units (ECUs), and the nuances of automotive maintenance. This article explores the technical realities, financial trade-offs, and performance metrics of GM’s 2026 FlexFuel lineup, while emphasizing the importance of precise vehicle verification.

MPG-o-Matic 2012 Buick LaCrosse eAssist Review Summary: The 2012 2012 LaCrosse with eAssist plays the efficiency card, as it targets the more affordable end of the luxury full-size market, with the Lincoln MKS, Acura TL, and Lexus ES350 as its primary competitors. The LaCrosse eAssist mates a 2.4-liter inline four with a lithium-ion battery powered electric motor, which achieves significantly better fuel economy (25/36) than the conventionally powered MKS (17/25), TL (20/29), and ES350 (19/28). When compared to the slightly smaller
MPG-o-Matic 2012 Buick Verano Review Summary: Buick aims high with the Verano sedan, targeting imported luxury marquees from Lexus and Acura to Audi and Volvo, with a price that undercuts the competition. With a smooth and exceptionally quiet ride, the Verano challenges what has come to be convention. The Verano’s FlexFuel engine and its ability to utilize E85 provides a clear advantage in geographic areas where ethanol is plentiful and significantly less expensive than unleaded gasoline. As gasoline prices continue to rise, this capability will become increasingly important.