Inside the Castrol EDGE 'Thrill of Driving' Study

This week, Castrol published the findings of its 'Thrill of Driving' study, an independent research project exploring what actually happens in the brain and body when a driver experiences genuine thrill behind the wheel. Our team here at Brainbox led the neurophysiological data capture and analysis behind the study, and it marks one of our first full contract research projects: taking a client from a scientific question, through study design and live field data collection, to a validated set of findings. 

The question: is thrill about speed, or something else?  

Castrol wanted to understand what separates a genuinely thrilling drive from one that's simply fast, or worse, one that tips into anxiety. Ten participants were monitored across six driving conditions at a closed test facility, from slow off-road driving in a Land Rover Defender through to a McLaren Artura GT4 on track, karting, and a high-speed passenger ride. We recorded EEG, heart rate variability, galvanic skin response and eye tracking simultaneously across every condition, then integrated the four datasets to see where they agreed and where they told different stories. 

The headline finding: thrill tracks focus and a feeling of control, not raw speed. The karting session, run at comparatively modest speeds, produced clearer signatures of engaged, positive arousal than being driven at high speed as a passenger, which read instead as anxiety. 

What it takes to get research-grade EEG on a racetrack 

Collecting research-grade EEG in a moving vehicle is a different problem to collecting it in a lab. Participants were wearing helmets, subject to genuine cornering forces, and moving between vehicles throughout the day, all of which are classic sources of motion artefact and electrode displacement that can wreck a signal.  

This is exactly the kind of environment mBrainTrain's Smarting PRO mobile EEG system was built for. It's a lightweight, wireless, dry-and-semidry-compatible amplifier designed for EEG recording during real movement rather than in a shielded booth, and it was the system we relied on throughout the study. 

A few things we had to get right:  

• Helmet compatibility. We ran a recce day ahead of the main study to confirm the cap could be worn cleanly under a helmet without compromising electrode contact, and to establish a re-check protocol every time a helmet came off between sessions, since that was the point at which signal quality was most at risk. 

• 30-channel coverage with reliable impedances from the Smarting PRO system, checked and monitored throughout a long field day rather than a single lab session. 

• Isolating the signal that mattered. The measure at the centre of the study was frontal-midline theta, an EEG marker of focused cognitive engagement. Extracting a clean theta signal from a driver's brain while they're taking corners at speed, rather than sitting still in a booth, is a meaningfully harder analytical problem than a typical EEG study. 

The result held up well. The McLaren session showed the clearest flow-state signature of any condition: elevated frontal-midline theta alongside healthy alpha activity, indicating sustained, focused engagement rather than overload. That pattern was distinguishable from the passenger ride, where theta and alpha both dropped and faster beta activity, associated with stress, increased instead. Getting a clean enough EEG signal to draw that distinction, in a car, at speed, is the part we're most proud of. 

Where eye tracking and skin conductance fit in  

EEG didn't do this alone. Eye tracking picked up the same story from a different angle: drivers in a flow state fixated on the racing line for longer and blinked infrequently, while the anxious passenger condition showed rapid, fragmented eye movements. Skin conductance added a general measure of physiological arousal, though on its own it can't tell excitement from anxiety apart, which is exactly why a multimodal approach was needed. 

If you're exploring how neurophysiological data, EEG in particular, could support a research question of your own, whether in a lab, a clinical trial, or a field setting like this one, we'd be happy to talk it through!