
Tesla Owners Transitioning to Diesels Could Be the Most Amusing Change of 2025 | Carscoops
A maturing product line and Elon Musk's political affiliations are believed to be significant factors in this change.
20 hours ago
by Brad Anderson
Tesla’s brand loyalty has experienced a considerable decline over the past year.
Numerous past electric vehicle (EV) owners are opting for gasoline and diesel alternatives.
Telsa's loyalty now ranks below Ford but remains ahead of Chevrolet.
Not long ago, traditional automakers were finding it difficult to compete with Tesla as increasing numbers of consumers transitioned from gasoline vehicles to the electric lineup from the Californian company. However, current data indicates a change in this trend. Recent figures indicate a significant decline in Tesla’s brand loyalty, with an increasing number of owners switching to competing brands and, in some instances, abandoning EVs altogether for diesel trucks from manufacturers like Chevrolet and Ford.
According to a new study by S&P Global, Tesla’s brand loyalty in the US fell by 9.4 percent in the second quarter of 2025 compared to the previous year, dropping to 58.1 percent. This places the company behind Ford, which stands at 59.6 percent, although it still surpasses Chevrolet at 58 percent, Toyota at 57.3 percent, Honda at 54.9 percent, and Mercedes-Benz at 54.2 percent.
Deteriorating Line-Up and Brand Perception
S&P Global reports that Tesla's loyalty rates have begun to decline earlier this year, attributed partly to its outdated product offerings and dependency on just two high-selling models, the Model 3 and Model Y. While both vehicles have undergone updates, their core design originates from several years ago. Without new introductions, consumers are increasingly drawn to rival brands providing a wider range of options. Moreover, Elon Musk's political views continue to alienate a segment of Tesla's customer base.
Experts emphasize that Tesla's downturn is not merely a rejection of electric vehicles but reflects purchasers gravitating to brands that present more varied options and features. BMW, Mercedes-Benz, and Toyota are among the primary beneficiaries when Tesla sedan and SUV buyers switch, spotlighting the brand's limited selection.
Transitioning to Alternative Fuels, Including Diesel
Among those departing Tesla, 68.9 percent selected another EV as their next vehicle in the first half of this year, a decline from the mid-70s peak in 2023. The remaining 31.1 percent opted for different fuel types, with 28.2 percent selecting hybrids and an unexpected 2.9 percent choosing diesel, a surprising decision for former EV users.
Other intriguing insights from the study reveal that when former Tesla owners shifted to Chevrolet, 55 percent reverted to gasoline models, 37 percent opted for another EV, while nearly 8 percent somehow chose diesel, as reported by Autonews. The report does not clarify this last group, but it is easy to speculate that many, if not all, could be disgruntled Cybertruck owners switching to diesel-powered Chevrolet Silverados.
Tesla’s edge over Ford has also decreased, with its conquest ratio falling to 1.9-1 from 2.4-1 a year prior. Among those who switched to Ford, half purchased gasoline vehicles, 29 percent remained with electric options, 13 percent opted for hybrids, and 5 percent chose diesel. Tesla's situation with BMW is similar: 47 percent of switchers selected gas models, 42 percent retained electric, and 11 percent picked hybrids.
Dwindling Momentum Among EV Repeat Buyers
Overall loyalty to battery-electric vehicles has decreased to 58.7 percent in 2025, down from nearly 68 percent two years ago, indicating a broader slowdown in repeat EV purchases. Traditional internal combustion vehicles still enjoy the highest loyalty at around 84 percent, although this figure is gradually declining. Hybrids are gaining traction but still lag behind both ICE and BEVs.
Conversely, loyalty is increasing among buyers of other electric brands. Fuel-type loyalty for non-Tesla EVs has risen to 46.4 percent, up from approximately 45 percent in 2020, indicating that adopters outside Tesla's sphere are more committed to remaining within the electric sphere. Overall EV brand loyalty has also improved, climbing to 43.5 percent compared to about 40 percent in 2021, supported by a range of more competitive models.
Tesla Still Attracting Many Buyers
Despite the growing number of departures, Tesla continues to capture a substantial share of new customers. In the second quarter, it attracted around twice as many Chevrolet customers as Chevrolet managed to attract from Tesla. However, this ratio has sharply declined from 4-1 just a year ago.
The contrast is even more pronounced with BMW. Tesla's conquest-to-defection ratio against the German brand was approximately 9-1, but with BMW now offering a much broader range of electric models,





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![Mazzei Formula via YouTube
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What you see here is the Mazzei Formula Five—or, to be precise, the Mazzei Formula Five. This unique supercar was created by David Mazzei, merging a Superlite SL-C kit car body with a custom-built five-rotor engine. Attached to this engine is a 106-millimeter Garret G57-3000 turbocharger, and as anticipated, it produces some astonishing sounds. Remarkably, it also generates 1,120 wheel horsepower on the dynamometer. Incredible.
Mazzei has been working on this car for quite a while. He mentioned back in 2021 his intention to develop a five-rotor engine for this project, and he has certainly fulfilled that commitment. His background in car building includes installing a four-rotor in an FD RX-7, so he was well-prepared to create a powerhouse like the Formula Five.
Along with running a 106mm turbo, the peripheral-port five-rotor features billet housings and a six-stage dry sump oiling system. The exhaust is insulated with inconel, and surprisingly, it utilizes Vibrant titanium race mufflers. I can hardly imagine how loud it must be.
All that power from the boosted 3.3-liter engine is transmitted to the rear wheels via a pneumatic Holinger MXT sequential transaxle. You’ll definitely notice this as you hear it flat-shifting on the dyno. A Tilton twin-plate clutch is adapted for this custom setup, and considering the Formula Five produces 806 lb-ft of torque—an impressive figure, rotary or otherwise—this clutch seems quite robust.
What’s even more astonishing is that the dyno run achieved 1,120 hp at the wheels with only 12.5 psi of boost. That enormous turbo is clearly capable of producing more power, and Mazzei himself acknowledges that they could increase the boost to reach 1,500 or 1,600 hp. He explains that during this initial phase of dyno tuning, they are working to improve volumetric efficiency. This issue might stem from the peripheral porting, which allows for greater overlap when both the intake and exhaust ports are open simultaneously, leading to a vacuum. Consequently, the turbo may be reintroducing inert gas, resulting in a decrease in oxygen density.
Even with this inefficiency, the Formula Five manages to achieve one flywheel horsepower per pound, which is remarkable. Take a listen:
This is far beyond anything I would ever attempt to build, but that’s not saying much, as I often feel challenged by my 1966 Ford dump truck. I think I’ll leave the supercar creations to Mazzei.
Do you have a tip or question for the author? Reach out directly at: [email protected]](https://carsworld.world/thumbs/carsworld.world-700/cf/9e/This-Michigan-University-Is-Starting-Motorsports-Management-Classes-This-Fall.webp)

Tesla Owners Transitioning to Diesels Could Be the Most Amusing Change of 2025 | Carscoops
The aging roster and Elon Musk's political inclinations are seen as significant reasons for the change.