F1 Sustainable Fuel Explained: What Powers a 2026 F1 Car
Welcome to the Happy Hour Racing Formula 1 Tech Breakdown, where we take one confusing part of F1 and make it make sense. No engineering degree required.
The Short Version
Starting this season, F1 sustainable fuel is the only thing that goes in the tank. The sport calls it Advanced Sustainable Fuel, and nothing in it comes out of the ground as crude oil. It is built from three approved sources: non-food plant waste, household and municipal waste, and carbon dioxide pulled out of the air and stitched back together with renewable hydrogen. At the same time the FIA stopped limiting how many kilograms of fuel an engine can drink and started limiting how much energy it can drink. That one change is the reason a 2026 car finishes a Grand Prix on roughly 70 kg of fuel instead of 100.
What Advanced Sustainable Fuel Is Actually Made Of
Think of ordinary petrol as a recipe. The ingredients are hydrogen and carbon atoms arranged in a few hundred useful shapes. Crude oil is just a cheap, convenient bucket of those atoms that has been sitting underground for a very long time.
F1's new rule does not change the recipe. It changes where you shop for the ingredients. The FIA says the carbon has to come from one of three places: non-food biomass, which is farm and forestry waste such as rice husks and straw rather than crops grown on land that could feed people; genuine municipal waste, including household rubbish and used cooking oil; or renewable fuel of non-biological origin, which is the mouthful of a name for grabbing carbon dioxide directly from the air or from a factory chimney, splitting water with renewable electricity to get hydrogen, and building fuel molecules out of the two.
There is one more catch that most people miss. The factory that makes the fuel has to run on renewable power too. You cannot make a clean fuel in a plant burning coal and call it clean.
Why the Limit Moved From Kilograms to Megajoules
Here is the clever part, and it is the bit that actually changes lap times.
From 2014 through 2025, the rule capped how much fuel could flow into the engine by weight: 100 kg per hour, no more. That works fine when every team burns basically the same petrol. It falls apart the moment teams are allowed to design their own molecules, because one supplier could simply cook up a fuel with more energy packed into each kilogram and get free horsepower.
So the FIA changed the unit. For 2026 the cap is on energy: 3,000 megajoules per hour, and the car's own electronics do the conversion based on certified samples of that team's fuel. Everyone is now allowed the same amount of energy per hour no matter what their chemists come up with. To keep it honest at the other end, the regulations also cap how much energy can be packed into a kilogram in the first place, at roughly 43 to 44 megajoules, which is about what F1 fuel already carried.
Pat Symonds, who was Formula 1's chief technical officer while these rules were written, put the reason plainly: "We are putting a limit on energy density because we want to feel that is relevant to the road."
Less Fuel, Same Speed
Cutting a car's fuel by 30 kg should make it slower. It does not, because the electric side picked up the slack. The FIA moved the combustion engine down from around 550 to 560 kW to about 400 kW, and moved the electric motor up from 120 kW to 350 kW. That is a 300 percent jump in battery power, the MGU-H heat recovery unit is gone, and the split between petrol power and electric power is now roughly even. F1 still expects the package to clear 1,000 horsepower.
So the car carries less fuel, the tank is smaller and lighter, and the driver still has the same shove. If you want the full picture of how the rest of the 2026 car works, we broke down the active aero system that replaced DRS and the new wings and power units earlier this year.
The Paperwork Nobody Expected
Making the fuel turned out to be the easy half. Proving it is the hard half.
The FIA brought in an outside auditor, the Zemo Partnership, and built a scheme called SRFAS to check every fuel before it is allowed near a race weekend. Two separate checks have to pass. One is the normal chemistry test against the fuel specification. The other traces the entire supply chain backward, with site audits on where the raw material came from, to confirm it really is waste or captured carbon and not something dressed up to look like it.
That took longer than anyone budgeted for. When the cars ran in pre-season testing at Barcelona and Bahrain, not every supplier had finished the process, and the FIA gave temporary permission to run a chemically identical but not-yet-certified fuel. Petronas got its Mercedes fuel signed off before the season opener in Australia, and BP got Audi's approved within the two weeks before it. BP's Luc Jolly said the company started the process more than three years earlier because it saw the complexity coming.
Powering the cars in 2026
— Formula 1 (@F1) January 24, 2026
Advanced sustainable fuel is here, created from cutting edge sources of energy! #F1 pic.twitter.com/HK7wTp0Slu
What This Means for You
Two things, and they both matter more than they sound.
The first is that this fuel is a drop-in. That is the whole design goal. It has similar ingredients and a similar octane rating to what comes out of a pump at your local station, and it is meant to work in an engine without redesigning the engine. F1 spent a decade building technology no road car would ever use. This is the opposite: if the chemistry scales, the same stuff can go into cars already on the road today.
The second is that fuel is now a performance item you can actually follow. Five suppliers are in the fight in 2026: Petronas, Shell, ExxonMobil, Aramco and BP. Their blends are certified, capped for energy density and capped for octane, but inside those walls the chemists have real freedom. When a team finds a tenth nobody can explain, the fuel is now a legitimate place to look.
The Bottom Line
F1 did not put a science project in the tank. It put ordinary petrol chemistry made from garbage, plant waste and captured carbon dioxide, then stopped measuring it by the kilogram and started measuring it by the joule. Same speed, 30 kg less fuel, and a recipe that could end up in your own car.
Shop the Story
If you made it this far, you are our kind of F1 fan. Here is what is in stock right now at Happy Hour Racing:
- Formula 1 Tech Limited Edition Belgian GP Hat, White
- Men's Formula 1 Tech Collection Team Softshell Jacket, Black
- New Era Alpine F1 MX 9Fifty Adjustable Cap, White
- McLaren F1 Lifestyle New Era 9Fifty Camo Baseball Hat
- Mercedes-AMG Petronas F1 George Russell 1:2 Scale Helmet
More Formula 1 gear is in the Happy Hour Racing Formula 1 collection.
