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Why Musk is supporting former Exxon Mobil CEO for Secretary of State
Elon Musk shocked social media when he tweeted an endorsement of Rex Tillerson as the next US Secretary of State on Tuesday. Musk has a few good things to say about Donald Trump leading up to his Presidency and Trump’s choice of the former CEO of Exxon Mobil seems to be a slap in the face to anybody who is concerned about global warming and the role fossil fuels have played in it.
Exxon Mobil is currently being investigated by the attorneys general of the New York and Massachusetts. Both contend the company knew of the harm that burning fossil fuels could do to the environment 40 years ago but elected to spend billions funding special interest groups to oppose the climate change message being put forth by James Hansen, The Union of Concerned Scientists, and others.
Weaning the world off fossil fuels is one of the central themes of Elon Musk’s plan to build compelling electric cars and promote solar power. What could he possibly find appealing about the CEO of the largest oil company in the world?
Yesterday, The Economist endorsed Tillerson and Musk tweeted shortly afterwards that he agreed with The Economist.
This may sound surprising coming from me, but I agree with The Economist. Rex Tillerson has the potential to be an excellent Sec of State.
— Elon Musk (@elonmusk) January 24, 2017
Musk added, “Rex is an exceptionally competent executive, understands geopolitics and knows how to win for his team. His team is now the USA. I share The Economist’s opinion that he should be given the benefit of the doubt unless his actions prove otherwise.
Has Elon deserted his loyal fans who tend to be rather more ecologically aware than the norm? Apparently not. Later in the day, he revealed the reason why he supports Tillerson for Secretary of State.
Rex Tillerson supports a carbon tax. This is what is really needed to move the needle. https://t.co/6ne01TOzs1
— Elon Musk (@elonmusk) January 25, 2017
Musk is betting that Tillerson will be able to influence Donald Trump to accept a carbon tax, something Musk has been advocating for since he first joined Tesla Motors. It is a way to eliminate what economists refer to as an “untaxed externality,” something that is a cost of doing business that is not incorporated into the price of finished goods.
Musk delicately refers to the fact that fossil fuel companies largely avoid paying the environmental and societal costs of their activities as “the turd in the punchbowl.” During the COP21 Paris climate summit, he made a compelling case for a carbon tax to a distinguished audience at the Sorbonne. In Tillerson, he seems to believe he has an important ally.
Musk has also been present at a number of meetings with Donald Trump, leading some to question whether his apparent support for the new President could alienate some of Musk’s traditional supporters. Until now, Musk and Tesla have been careful not to become embroiled in the divisive political storm that is roiling America.
Treading carefully between the needs of his businesses, the needs of his customers, and the policies of the new government may be one of the toughest challenges Musk has ever faced. Uber, for instance, has suffered a backlash from people incensed that CEO Travis Kalanik has accepted an appointment to one of Trump’s policy forums for business leaders. Musk is also a member of the same forum, but so far there has been no political backlash against Musk and Tesla.
Tesla is doing what Trump wants other car companies to do — build more American factories that employ American workers. But SpaceX is dependent on NASA for a significant portion of its future income. Of all Musk’s business ventures, it can least afford to alienate the current occupant of the Oval Office.
Musk may have made a carefully calibrated political calculation with regard to his working arrangements with the administration, but his support for and trust in Rex Tillerson seems to be grounded in the belief that a carbon tax is vital step to the fight to limit the damage from the consumption of fossil fuels. Unless and until he does something to break that trust, Tillerson and Musk will remain what Washington watchers for decades have called “strange bedfellows.”
Although the two vehicles are built for completely different use cases, Tesla utilized engineering expertise while developing both the Cybercab and Semi to build a thermal architecture that would fit both vehicles. Of course, with some slight revisions.
The development was noted by Lars Moravy and Dan Priestley last week at Tesla’s Semi Handover event in Sparks, Nevada, where the company showed off its dedicated production facility for the Class 8 truck.
🚨 Tesla designed the integrated thermal systems for Cybercab and Semi at the same time as the vehicles were both in development
Tesla wanted to build one thermal system that worked with both vehicles, apart from small modifications.
Semi and Cybercab share parts 🤯 pic.twitter.com/KmzSsUbrcg
— TESLARATI (@Teslarati) September 25, 2026
Tesla’s decision to develop one thermal architecture for both the Cybercab and Semi is one of the more revealing engineering choices in the company’s 2026 lineup:
“We designed it at the same time we designed the Cybercab and we said okay we’re going to take our most efficient vehicle and our biggest vehicle and we’re going to take one thermal system and make it work for both.”
Core parts, meaning the compressor, pumps, and heat exchangers, are shared, with only modest changes to cooling-loop sizing and a larger radiator on the truck. The result, they said, is a compressor and thermal stack already proven across millions of miles, delivering “reliability from day one.”
Priestley also highlighted a practical payoff of the indirect design:
“There’s no AC lines, there’s no refrigerant lines…It comes from the factory fully charged, sealed with refrigerant, and it just exchanges coolant. It doesn’t actually run refrigerant up to the front of the vehicle.”
This eliminates potentially leak-prone plumbing that would otherwise require hands-on service, reducing overall uptime and potentially cutting into business margins. The megamanifold runs cabin HVAC and every powertrain heating and cooling loop at once, recapturing waste heat from motors and the battery instead of dumping it the way a diesel engine does.
The approach is just the latest chapter in a continuing story of stretching thermal solutions across wildly different vehicles. Model Y’s Octovalve evolved into the Super Manifold used on Cybertruck, and later Model S/X refreshes. Cybercab then introduced Supermanifold V3, which Tesla says is 80 percent automated to build and 38 percent more efficient than typical automotive thermal systems.
This thermal system is also shared with Cybercab – one thermal system for both our most efficient vehicle & our biggest vehicle
— Tesla Semi (@tesla_semi) September 25, 2026
Tesla has done the same with the 4680 cells, both being utilized in the Cybertruck and Semi, and with heat-pump compressors that Priestley noted were already common across the passenger-car fleet.
Concurrent development of crucial vehicle elements buys scale and reliability that a truck-only thermal system could not match. High-volume passenger car parts are cheaper and more accessible, which can give fleets a sealed, low-maintenance loop of operation from their first day of operation.
For owners and operators, that translates into less energy spent on cabin heat in the colder months, fewer refrigerant-related repairs, and a thermal architecture already stress-tested at passenger-car volumes before the first high-volume Semi left the lines in Nevada.
Tesla CEO Elon Musk certainly tipped off some details of the Tesla Roadster event with a broadening of information regarding the company’s decision to delay the unveiling for two weeks.
For years, people have speculated about what the Roadster will be capable of. While there have been plenty of things said about what it *could* do, we have not seen or been told by Tesla what it will actually be capable of.
However, over the past few days, Tesla’s weather updates have truly pushed the speculation into Plaid Mode, basically all but confirming the car will have some sort of aerial capability — whether that would be hovering or fully flying remains to be seen — but it definitely seems that it will be able to leave the ground intentionally.
“Because this event can only be held outdoors…”
Tesla posted on Monday that it would delay the Roadster event until October 15, and it indicated that it had to do this because the event “can only be held outdoors.”
With the potential SpaceX collaboration to develop cold-gas thrusters that will help the vehicle go airborne, doing this indoors is probably not a safe, or even plausible, possibility.
Roadster event update
We’ve been tracking the weather closely with local meteorologists, but given the severe conditions predicted & because this event can only be held outdoors, we’ve made the difficult decision to reschedule.
New date is October 15. Additional details to…
— Tesla (@Tesla) September 28, 2026
FAA Airspace Restriction
The FAA gave Tesla a Temporary Flight Restriction (TFR) for 10,000 feet above ground level, much higher than the typical 2,000-foot restrictions that are usually placed at SpaceX’s McGregor, Texas site.
Tesla Roadster event requires restricted airspace, and the FAA obliges
Some have said that this massive increase is due to Tesla’s need to restrict unauthorized drone use for spying on the event.
Elon Admits High Winds
“Due to high winds, the new Roadster demo is postponed by 2 weeks,” Musk said in a post on X yesterday.
Due to high winds, the new Roadster demo is postponed by 2 weeks https://t.co/dV3ojDh1iT
— Elon Musk (@elonmusk) September 30, 2026
A reply reading, “What’s strong wind got to do with a car demo with four grounded wheels?” was directly below Musk’s post, satirically and sarcastically probing for more details.
All signs are pointing toward an aerial demonstration for the Roadster.
Tesla has secured $30 billion in fresh credit lines from Citibank and Wells Fargo in an effort to scale its biggest current projects.
Tesla agreed to a $20 billion three-year delayed-draw term loan facility from Citibank, it announced on Tuesday. Additionally, it signed a five-year, $8 billion revolving credit facility and a $2 billion, 364-day term credit facility with Wells Fargo.
In a filing with the Securities and Exchange Commission (SEC), that it “may draw” from the $20 billion delayed-draw term “from time to time” and “no more than ten times during the 18 months following the closing date.” This loan matures on September 29, 2029.
The five-year revolving facility from Wells Fargo will also be accessed by Tesla “from time to time,” and will become due and payable on September 29, 2031. Tesla can request two separate one-year extensions.
On the $2 billion, 364-day revolving loan, it becomes due and payable on September 28, 2027. Tesla can also increase its additional commitments to an additional $4 billion across the Revolving Facilities. This would increase the total facilities to $14 billion. Tesla said it does not plan to utilize any of these loans in 2026.
Tesla plans to utilize the money to help prop up its ambitions to scale its biggest products, each of which is either in early launch phases or still in development. Of course, we’re talking about Cybercab and Semi, which have launched, and Optimus, which is still under heavy development and working toward initial release.
All three Tesla products have one thing in common: they’ve all required Tesla to build new manufacturing lines for them.
For the Semi, Tesla built a brand new factory in Sparks, Nevada, adjacent to the Tesla Gigafactory. For Optimus, Tesla sunset Model S and X production at the Fremont Factory, which brought an end to the two flagship models, thus creating manufacturing space for the humanoid robot. Finally, Cybercab is being built at Gigafactory Texas and officially entered production earlier this year.
The cash will help Tesla bolster its finances for the continuing development of these products. Tesla said that it forecasts its CapEx to be over $25 billion, up from just over $8.5 billion last year. These loans surely help with that spending.
Tesla Cybercab and Semi have more in common than you might think
Elon Musk weather update tips Tesla Roadster speculation into Plaid Mode
