TECHNICAL INSIGHT · 29 JUNE 2026
NTUA analysis reveals a new dimension of fuel performance: torque quality.
High-frequency analysis indicates that conditioned fuel reduced low-frequency engine speed hunting by 34.2% and materially changed how combustion energy was expressed through the rotating system.
Fixed RPM does not mean perfectly constant rotation.
The original National Technical University of Athens research established that the test engine could deliver the same independently verified average torque and RPM while using less fuel. Further analysis by Associate Professor George Papalambrou examined the rapid variations that conventional averages can hide.
The analysis compared untreated operation on 23 September 2025, immediate post-treatment operation on 25 September, and conditioned operation after approximately 12 hours of contact time on 26 September.
A stronger combustion-frequency response.
Activity in the 14.5–15.5 Hz combustion-cycle range increased by 109.8%. That should not automatically be described as either improvement or deterioration. It demonstrates that the engine’s dynamic response changed materially at the frequency associated with combustion.
Considered alongside lower governor hunting and lower rotational variation, the result raises a technically important possibility: combustion energy may have become more clearly concentrated at the combustion-cycle frequency while less energy appeared in slower corrections and instability.
The engine appears to have responded more directly to combustion while requiring fewer slow corrections to maintain its target speed.
An important, preliminary finding.
The work is based on selected files rather than the complete NTUA dataset. It does not yet directly quantify instantaneous torque variability or torque jerk, and it does not represent a new fuel-saving percentage. The next phase should synchronise mean RPM and torque with instantaneous torque, torque jerk, combustion-cycle consistency and useful work per unit fuel.
From work quantity to work quality.
Conventional efficiency asks how much mechanical work is produced from the fuel. Torque quality asks how consistently and usefully that work is delivered. The original NTUA tests established an improvement in work quantity per unit fuel. The latest analysis indicates that fuel conditioning may also influence the quality and stability of rotational output.