MOTOR TRUCKS ON EASTERN FARMS. 
27 
are shown in Table XVI. The average price which these men paid 
for gasoline at the time they made their reports (January and Feb- 
ruary, 1920), was 27 cents per gallon, and the average price of lubri- 
cating oil was 65 cents per gallon. The costs per mile traveled are 
computed from these figures. No attempt was made to learn the 
amount and value of the grease used, but in any case its value should 
be only a fraction of that of the lubricating oil. 
Table XVI. — Gasoline and oil requirements of trucks of different sizes. 
[Gasoline at 27 cents per gallon; lubricating oil at 65 cents per gallon.] 
Gasoline. 
Oil. 
Total 
cost per 
Size of truck. 
Miles per 
gallon. 
Number 
of reports. 
Cost per 
mile. 
Miles per 
quart. 
Number 
of reports. 
Cost per 
mile. 
mile for 
gasoline 
and oil. 
14.8 
12.1 
11.2 
9.5 
8.0 
138 
92 
332 
64 
75 
$0,018 
.022 
.024 
.028 
.034 
59 
58 
48 
49 
40 
93 
71 
281 
54 
62 
$0. 003 
.003 
.003 
.003 
.004 
$0. 021 
3-ton 
.025 
.027 
.031 
2-ton 
.038 
TIRES. 
Each man was asked to state what he paid for tires and the mileage 
obtained. The cost per mile for tires as shown in Table XVII is 
figured by simply dividing the average cost per tire by the average 
number of miles which the tire runs, and multiplying this result by 
four to obtain the cost for four tires. According to the estimates of 
318 men, the pneumatic tires on these trucks run an average of 4,500 
miles, and according to the estimates of 206 men the solid tires run 
an average of 8,200 miles. Such a large percentage of the ^-ton 
and f-ton trucks used are equipped with pneumatic tires that no 
figures for solid tire costs for these sizes are given, and such a large 
percentage of the trucks over 1 ton in size are equipped with solid 
tires that no figures for pneumatic tire costs for them are shown. 
An allowance for the mileage obtained from the tires with which a 
machine is equipped when purchased must be made in order to deter- 
mine the net tire cost to the user, as the cost of the first set of tires 
is included in the purchase price of the truck. 
According to the estimates of these men the percentage of the total 
mileage of the trucks obtained from the tires with which they are 
equipped when purchased is as follows : 
Pneumatic tires on the £-ton trucks run 18 per cent of the total mileage. 
Pneumatic tires on the f-ton trucks run 17 per cent of the total mileage. 
Pneumatic tires on the 1-ton trucks run 19 per cent of the total mileage. 
Solid tires on the 1-ton trucks run 36 per cent of the total mileage. 
Solid tires on the 1{- and lj-ton trucks run 40 per cent of the total mileage. 
Solid tires on the 2-ton trucks run 26 per cent of the total mileage. 
