Results of 3,000,000-mi field tests, undertaken to compare multigrade oils with customary single-grade oils in six types of equipment; gasoline and diesel trucks, diesel buses, earthmovers, farm tractors, and taxicabs; qualities studied include fuel and oil mileage, low temperature starting, and engine wear; savings obtained in fuel economy outweigh additional cost.
Multigrade oils pay off in heavy-duty service
Soc Automotive Engrs -- Paper
SAE Meeting ; 1958 Automobile engines
1958
11 pages
Conference paper
English
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MULTIGRADE OILS PAY OFF IN HEAVY-DUTY SERVICE
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