"
MOBIL DELVAC 1630 30wt HIGH ZINC, 1400ppm ZDDP, MOTOR OIL, 55 Gallon Drum. Mobil Delvac 1630, 1640, and 1650 are high performance monograde diesel engine oils formulated from advanced technology base oils and a balanced additive system."


Do a web search on "mobil 15w-40 Delvac ZDDP"

Tim
1954Advance-Design.com
1954 3106 Carryall Suburban
1954 3104 5-window pickup w/Hydra-Matic
The 216 and early 235 engines are not "splash oilers" -- this is a splash oiler.