1975 NASCAR International Stock Car Racing Rule Book Grand National Championship Division Section 20-8 -- Lubrication

a. Any oil is permissible.

b. Oil pressure may be regulated at discretion of owner or driver.

c. Any NASCAR approved oil filters and breather caps may be used. Dry sump oiling system may be used, but must be NASCAR approved. During running of the race, oil must be added from the engine compartment. The reservoir capacity shall be limited to 1.155 cubic inches and location and installation must be NASCAR approved.

NOTE: For AeroWarriors.com users, the "1.155" figure found above is certainly in error, and in all likelihood should be "1,155".