Energy Ontario DriveSave Fuel Economy Calculator Slide Rule

In 1982 the government of the Canadian province of Ontario prepared this silver and orange paper linear slide rule for motorists. The front cover is marked: Energy (/) Ontario. It is also marked: fuel (/) economy (/) calculator. It is also marked: DriveSave (/) Improving the Fuel Economy (/) of Automobiles in Ontario. Inside are instructions for tracking distances driven and fuel purchases on a provided "fuel economy log" and for calculating miles per gallon or liters per 100 kilometers with the provided slide rule.
The back cover contains driving and maintenance tips for improving fuel economy. It is marked: Ontario. It is also marked: Ministry of (/) Transportation and (/) Communications (/) Hon. James W. Snow (/) Minister. It is also marked: Ministry (/) of (/) Energy (/) Hon. Robert Welch (/) Minister. DriveSave was located in the Ministry of Transportation offices in Downsview, Ontario. Snow served from 1975 to 1984, and Welch served from 1979 to 1983.
Currently not on view
Object Name
calculating rule
slide rule
date made
Province of Ontario
Physical Description
paper (overall material)
overall: .2 cm x 17.9 cm x 8.5 cm; 1/16 in x 7 1/16 in x 3 3/8 in
place made
Canada: Ontario
ID Number
nonaccession number
catalog number
Science & Mathematics
Slide Rules
Rule, Calculating
Energy & Power
See more items in
Medicine and Science: Mathematics
Slide Rules
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Transfer from Division of Engineering and Industry
Additional Media

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