Cadillac 1967 VVI Data Book page 177

Operation in Foreign Countries
If you plan to drive your car outside the continental
limits of the United States or Canada, there is a possibility
that the best fuels available are so low in anti-ksock quality
that excessive knocking and serious engine damage may
result from their use. To minimize this possibility, write
to the Cadillac Motor Car Division, Service Department,
Detroit, Michigan giving;
• The car's vehicle identification number (obtain from car
registration or title).
• The country or countries in which you plan to travel.
You will be furnished details of adjustments or modifica-
tions which should be made to your engine at your Cadillac
dealership prior to your departure. Failure to make the neces-
sary changes to your car and subsequent operation under
conditions of continuous or excessive knocking constitutes
misuse of the engine for which the Cadillac Motor Car
Division is not responsible under the terms of the Manu-
facturer's New Vehicle Warranty. After arriving in a foreign
country, contact the nearest authorized General Motors Dealer
for brand names of the best fuels available and advice as to
where they may be purchased.
Gasoline tank
Capacity of the fuel tank is approximately 26 gallons on all
48
styles except the Commercial Chassis, which has a 20 gallon
capacity fuel tank. The gasoline filler cap is located behind the
rear license plate. To reach the cap, pull out on the top of
the license plate.
CAUTION: Gasoline is extremely flammable and highly
explosive under certain conditions. Always stop the
engine and do not smoke or allow open Sames or sparks
near the vehicle when refueling. If gasoline fumes are
noticed while driving, the cause should be determined
and corrected without delay.