Automotive chemical manufacturer Prestone is currently developing a low-conductivity electric vehicle (EV) coolant that scientists hope can increase EV efficiency.
While ethylene glycol is used in both gas vehicles and EVs, including Teslas, Prestone has increased its research and development budget for learning about less conductive cooling fluids over the past year, as detailed in a report from Automotive News on Friday. Prestone EV Director Tom Corrigan says that that won’t be the case in the future, as the company seeks to develop its own.
“Essentially, EVs are borrowing the internal combustion engine fluid,” Corrigan said. “We are going to see a shift in that in the next one to two years.”
The company has been testing its low-conductivity EV coolants in Ford Mustang Mach-E vehicles at its tech center in Danbury, Connecticut, in recent months. While initial offerings are roughly two years away and will still include ethylene glycol bases, Corrigan also says that petroleum-based dielectric coolants could replace the chemistry in future years.
Coolant types may also be dependent on battery chemistries, with lithium-iron phosphate (LFP), solid-state, and nickel manganese cobalt batteries likely all requiring different coolant makeups. Tesla writes on its website that its cooling systems currently use a phosphate and nitrate-free ethylene glycol-based coolant.
Ethylene glycol can ionize over time when it interacts with metals, plastics, and other necessary engine materials. As the coolant gains electrons, the overall efficiency of a battery-electric vehicle (BEV) is decreased. In addition, the coolant chemistry is expected to shift because of safety, as a BEV-friendly replacement for the corrosion inhibitors used in ICE coolants.
“Those ionize in the fluid and carry an electrical charge. If you have an issue where high-conductivity coolant contacts high-voltage electronics or the battery, it can lead to fire,” Corrigan explains. “So what we are working on is low-conductivity coolant.”
Scientists evaluate the electrical conductivity of coolants using a unit called microsiemens, which measures the conductivity per centimeter. In gas cars, experts expect to see between 3,000 and 5,000 microsiemens per centimeter, considered highly conductive, though it doesn’t negatively interact with gas vehicles in the same way it does for BEVs.
Instead, BEV makers are asking Prestone to develop a coolant with just 100 microsiemens per centimeter, while other fuel cell vehicles may require coolant conductivity levels of just 0.5 to 1.5 microsiemens, according to Corrigan.
“Every bit of increased conductivity is a loss of efficiency in the fuel cell. You’ve got to make the fluid very pure,” he notes.
Along with adding to the company’s R&D budget, Prestone added an additional five scientists and engineers in the department developing coolants for BEVs and fuel cells.
“We see where the future is going with EV coolants, and we want to be ready when the manufacturers are ready,” Corrigan says.
RELATED:
StoreDot closes in on U.S. market entry with launch of R&D campus in California
What are your thoughts? Let me know at zach@teslarati.com, find me on X at @zacharyvisconti, or send us tips at tips@teslarati.com.
News
Tesla launches new interior option for rare Model Y trim
Tesla just launched a new light grey interior option for the Model Y L in China, which will cost $1,120.

Tesla has launched a new interior option for the rare Model Y L trim that is available only in China, marking the first new color for the inside of a vehicle in some time.
Tesla has traditionally stuck with either Black or White interior options with the Model 3 and Model Y, although the Model S and Model X have had additional colors. The Model S and Model X still have a Walnut Cream interior option that costs an additional $2,000.
With the mass market models, however, Tesla has maintained the Black or White selections, until now, at least in China.
Tesla just launched a new light grey interior option for the Model Y L in China, which will cost $1,120.
It differs from the white interior slightly, but it is nice for buyers in China to have this third option:
The new color is only available on the Model Y L in China, so customers who take delivery of other trim levels or in other regions will not have this color available to them, just as the vehicle configuration itself is exclusive to that market.
In terms of whether it will make its way to other markets, CEO Elon Musk has said that the Model Y L could potentially make its way to the United States at the end of 2026, but it is not a certainty.
Musk said:
“This variant of the Model Y doesn’t start production in the U.S. until the end of next year. Might not ever, given the advent of self-driving in America.”
This variant of the Model Y doesn’t start production in the US until the end of next year.
Might not ever, given the advent of self-driving in America.
— Elon Musk (@elonmusk) August 20, 2025
This came as a disappointment to many fans and owners in the U.S. because people here have been pushing Tesla to create and manufacture a new, full-size SUV, or at least something more traditional that competes with vehicles like the Chevrolet Tahoe and Ford Expedition.
While the Model Y L is not on par with the size of those vehicles, it is a longer and larger version of the best-selling Model Y.
Tesla China shows off Model Y L’s manufacturing process in new video
Nevertheless, the new interior option is something we could hopefully see added to U.S. vehicles, although it seems Tesla’s focus is truly dialed in on the Cybercab and expanding Robotaxi and autonomy.
News
Tesla Gigafactory Texas builds its half millionth vehicle
The milestone was shared via Twitter/X by the official @Gigafactories account.

Tesla’s Gigafactory Texas has officially rolled out its 500,000th vehicle, marking a significant achievement in the factory’s history and reinforcing its role as a central hub in Tesla’s vehicle manufacturing network.
The milestone was shared via Twitter/X by the official @Gigafactories account. “Congratulations to the Giga Texas team for building 500k vehicles,” the company’s X post read.
As could be seen in Tesla Manufacturing’s post, the Gigafactory Texas team celebrated the milestone by posting for a photograph with the facility’s half millionth unit, a white Tesla Model Y. The team held balloons that spelled “500K” on its commemorative photo.
Giga Texas, located near Austin, has ramped its operations since its launch, producing Tesla’s Cybertruck and Model Y. Crossing the half-million vehicle mark solidifies the facility’s importance to Tesla’s overall operations, especially considering the fact that the Model Y is the company’s best-selling vehicle.
While Giga Texas is just producing the Model Y and the Cybertruck for now, the facility is also poised to produce the Cybercab. The Cybercab is expected to be Tesla’s highest volume vehicle, with Elon Musk estimating that the company would be producing about 2 million units of the autonomous two-seater per year.
The Cybercab is unlike any vehicle that is currently produced today, and its production would be quite extraordinary. As per Elon Musk’s previous comments, the Cybercab’s manufacturing line would not look like an automotive production line at all. Instead, Musk noted that the Cybercab’s line in Gigafactory Texas would resemble a high-speed consumer electronics line instead.
“We do want to scale up production to new heights obviously with the Cybercab. Cybercab is not just revolutionary car design. It’s also a revolutionary manufacturing process. So I guess we probably don’t talk about that enough, but if you’ve seen the design of the Cybercab line, it doesn’t look like a normal car manufacturing line. It looks like a really high-speed consumer electronics line,” Musk previously stated.
News
Tesla reportedly places large order for robot parts, hinting that Optimus V3 design is all but finalized
Tesla has reportedly placed a large order of linear actuators for humanoid robots from a Chinese supplier.

Tesla might have all but finalized the design for its Optimus V3 humanoid robot, at least if rumors from China prove accurate. As per recent reports, Tesla has reportedly placed a large order of linear actuators for humanoid robots from a Chinese supplier, with deliveries expected sometime in the first quarter of 2026.
The volume of orders suggested by the reports from China suggests that the components will not just be used for Optimus prototypes.
The rumor
As noted in a report from Sina News, media outlets across China have recently reported that Tesla has placed a $685 million (5 billion RMB) order for linear actuators from Sanhua Intelligent Controls. The components will reportedly be used for the production of Optimus, which will likely be mass-produced in its V3 iteration. The reports claimed that the delivery of the actuators will likely start sometime in the first quarter of 2026.
Industry watchers have estimated that such a volume would be enough for about 180,000 Optimus robots. This suggests that while Tesla might not be able to start the initial production of its humanoid robots this year, the electric vehicle maker might be able to hit the ground running with its Optimus production next year. And as hinted at by Elon Musk’s comments on X, Tesla seems to be preparing to produce Optimus V3 en masse.
Company comments
The reports of Tesla’s alleged actuator orders have resulted in Sanhua Intelligent Controls’ stock rising. Interestingly enough, a Tesla China representative has stated that “no official information about this order that could be disseminated externally.” A representative from Sanhua, on the other hand, simply stated that the company’s robotics business is progressing smoothly, but they could not comment on market rumors.
While these reports are rumors for now, there are some optimistic hints that Tesla might have all but finalized the design for Optimus V3, and the company might be looking to start the robot’s production. For one, Sanhua is already a Tesla supplier, providing components for the company’s electric cars. A report from The Information also alleged that Tesla is no longer looking to produce 5,000 Optimus robots in 2025. This was reportedly due to challenges in the robot’s hands.
If Tesla is really starting to order large volumes of components for Optimus’ production, it would suggest that the company might have overcome the challenges it was facing with the humanoid robot earlier this year. It would then not be farfetched if Tesla were able to start the initial production of Optimus V3 next year.
-
News1 week ago
Tesla FSD (Supervised) V14.1 with Robotaxi-style dropoffs is here
-
Elon Musk5 hours ago
Starship’s next chapter: SpaceX eyes tower catch after flawless Flight 11
-
News1 week ago
Tesla all but confirms that affordable Model Y is coming Tuesday
-
Elon Musk2 weeks ago
Elon Musk announces ‘Grokipedia’ as Wikipedia alternative from xAI
-
Elon Musk1 week ago
Tesla releases cryptic teaser for something massive and it’s coming this week
-
News6 hours ago
Tesla reportedly places large order for robot parts, hinting that Optimus V3 design is all but finalized
-
Investor's Corner2 weeks ago
Tesla Q3 deliveries expected to exceed 440k as Benchmark holds $475 target
-
News6 days ago
My Tesla did this on FSD (Supervised) v14.1 and the internet went crazy