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Taxicab Fuel Economy and Engine and Rear Axle Durability with Low-Viscosity and Friction-Modified Lubricants
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1982 by SAE International in United States
Annotation ability available
A 55-taxicab fleet test was conducted for 160 000 km to determine the effects of low-viscosity and friction-modified engine oils and rear axle lubricants on fuel economy and durability. In GM City-Suburban and 80 km/h constant-speed tests conducted at the Indianapolis Motor Speedway, fuel economy with low-viscosity engine oil and rear axle lubricant combinations was about 1 to 2 percent greater than that with SAE 10W-40 engine oil and SAE 80W-90 rear axle lubricant. These improvements were obtained after 40 000 and 80 000 km of taxicab service. Fuel economy with a graphite-containing SAE 10W-40 engine oil was about 2.5 percent better in both tests. No differences in either engine or rear axle durability were observed among the lubricants. However, oil economy with low-viscosity engine oils was about 20 to 30 percent less than that with the SAE 10W-40 oil. Adding either graphite or MoS2 to an SAE 5W-30 engine oil did not affect oil economy or oil performance, but oil filter plugging was increased in high-mileage cabs. Oil filter plugging increased with increasing engine oil viscosity, filter change interval, and cab mileage.
It is concluded that the use of energy-conserving lubricants improves fuel economy for both low- and high-mileage vehicles, without adversely affecting vehicle durability. The significance of this conclusion is that vehicles on the road can benefit from the use of such lubricants.
CitationHaviland, M. and Linden, J., "Taxicab Fuel Economy and Engine and Rear Axle Durability with Low-Viscosity and Friction-Modified Lubricants," SAE Technical Paper 821227, 1982, https://doi.org/10.4271/821227.
- ASTM Fuel-Efficient Engine Oils Task Force Report on the Pilot and Demonstration Programs American Society for Testing and Materials Philadelphia, Pennsylvania May 1982
- Goodwin M. C. Haviland, M. L. “Fuel Economy Improvements in EPA and Road Tests With Engine Oil and Rear Axle Lubricant Viscosity Reduction SAE Paper 780596
- Haviland M. L. Goodwin, M. C. “Fuel Economy Improvements With Friction-Modified Engine Oils in EPA and Road Tests,” SAE Paper 790945
- Whitehouse J. A. Metcalf, J. A. “The Mechanical Efficiency of I.C. Engines,” The Motor Industry Research Association Warwickshire, England June 1958
- Waddey, W. E. Shaub, H. Pecoraro, J. M. Carley, R. A. “Improved Fuel Economy Via Engine Oils,” SAE Paper 780599
- Ghirla P. J. Smith, R. K. “Automotive Engine Friction and Fuel Efficiency-Viscous versus Non-Viscous Effects,” SAE Paper 780984
- McGeehan, J. A. “A Literature Review of the Effects of Piston and Ring Friction and Lubricating Oil Viscosity on Fuel Economy,” SAE Paper 780673
- Papay, A. G. “Energy-Saving Gear Lubricants,” ASLE Paper 79-AM-2E-1 May 1979
- Lohuis, J. R. Murphy, J. A. Rogers, T. W. “The Performance of Fuel-Saving Engine Oils,” SAE Paper 800436
- ASTM Special Technical Publication 315H “Multi-Cylinder Test Sequences for Evaluating Automotive Engine Oils,” September 15 1979 American Society for Testing and Materials Philadelphia, Pennsylvania
- Marciante A. Chiampo, P. “Influence of Lubricating Oil Ash on the ORI of Engines Running on Unleaded Fuel,” SAE Paper 720945
- Comparative Climatic Data Through 1977 U.S. Department of Commerce Wallis, A. L. National Oceanic and Atmospheric Administration May 1978
- Society of Automotive Engineers Handbook 1982
- Davison E. D. Haviiand, M. L. “Lubricant Viscosity Effects on Passenger Car Fuel Economy,” SAE Paper 750675
- Bennington, J. E. Cole, D. E. Ghirla, P. J. Smith, R. K. “Stable Colloid Additives For Engine Oils — Potential Improvements in Fuel Economy,” SAE Paper 750677
- Coordinating Research Council Manuals 4 January 1969 Atlanta, Georgia
- Kabel, R. H. “Engine Oils for the 1980's,” Presented at the American Petroleum Institute Automotive and Petroleum Industry Forum Southfield, Michigan January 23 1980
- SAE Recommended Practice “Oil Filter Test Procedure” HS J806b Warrendale, Pennsylvania August 1976
- Talbot, A. F. Wright, W. A. Morris, H. I. “A Bench Scale Engine Test For Shear Stability of Multigrade Engine Oils,” SAE Paper 730485
- Pless L. G. Rodgers, J. J. “Cam and Lifter Wear As Affected by Engine Oil ZDP Concentration and Type,” SAE Paper 770087
- Gallopoulos, N. E. “Engine Oil Thickening in High Speed Passenger Car Service,” SAE Paper 700506
- Asseff, P. A. “Used Oil Analyses - Significance,” Presented at the Farm and Construction Equipment Fuels and Lubricants Forum Chicago, Illinois January 1975
- Hudgens R. D. Feldhaus, L. B. “Diesel Engine Lube Filter Life Related to Oil Chemistry,” SAE Paper 780974
- Experimental Statistics Natrella, M. G. National Bureau of Standards Handbook 91 U.S. Department of Commerce 1963