F+L Week 2019 | R. Ramaprabhu | Potential & challenges in fuel economy improvement of automotive vehicles by lubricants
Fuel Efficiency improvement by optimal lubricant selection has potential benefits as well as constraints with respect to engine design and durability beyond certain threshold limits. The objective of this work is to study the effect of lubricant formulations on efficiency improvement, challenges of durability protection and limitations of formulations.
The potential possibilities of fuel efficiency improvement were experimented with various combination of additives and base oils. The study tried to establish fuel economy improvement in both controlled and on-road real world driving condition.
Fuel Economy improvement and its variation between different type of engines was established. The effect of low viscosity lubricants on wear protection is also analyzed.
This study considered already established fuel economy engine oil (with 2.5% improvement) as reference for passenger cars and about 2% in heavy duty vehicles compared to regular reference fluids.
This study also considered measuring a very narrow band of improvement (0.5 to 1.5%).