Can't speak for the original poster, but the theory may be throttling back on your burn rate (oxidation of fuel) might make your machine last longer.
Mice with more uncoupled mitochondria have a higher metabolic rate and live significantly longer.
Speakman JR et al. 2004. Uncoupled and surviving: individual mice with high metabolism have greater mitochondrial uncoupling and live longer. Aging cell, 3(3), pp.87-95.
One can mimic this effect with uncouplers like 2,4-DNP, which as body builders will tell you, carries the risk of cooking from within.
Caldeira da Silva CC et al. 2008. Mild mitochondrial uncoupling in mice affects energy metabolism, redox balance and longevity. Aging cell, 7(4), pp.552-560.
C60 may function primarily as a mitochondrial uncoupler as well.
Chistyakov VA et al. 2013. Possible mechanisms of fullerene C60 antioxidant action. BioMed research international, 2013.
Why would increasing the burn rate extend lifespan? Mitochondrial ROS production varies nonlinearly with membrane potential and thus ROS production is highly sensitive to a small decrease in membrane potential. A 10 mV decrease in membrane potential is enough to abolish around 70% of the ROS produced by complex I.
Miwa S and Brand MD, 2003. Mitochondrial matrix reactive oxygen species production is very sensitive to mild uncoupling. Biochemical Society Transactions, 31(6), pp.1300-1301.
This holds true for humans, as well:
Its a striking enough effect that I've delved into the literature on uncoupling protein inducers, which include:
β3 adrenergic agonists (mirabegron, solabegron)
PPARγ agonists (benzafibrate, pioglitazone)
AMPK activation (exercise, fasting, metformin, berberine, salicylates, telmisartan, dietary polyphenols)
capsaicin and capsaicin-analogs
fucoxanthin
retinoids
dietary methionine restriction
cold exposure