Certain data about the German use of fuel and lubricants for their
mechanized equipment are reported as a result of the examination of specimens.
Analysis of German yellow gasoline shows that this normally has an
octane number of 74 (similar to our "regular" as sold in American service
stations) or better. The chemical composition of German gasoline varies
considerably. It frequently contains a rather high proportion of benzol or of
alcohol, and this should result in a slightly higher consumption per mile
than with our regular 72 to 75 octane gasoline.
Specimens have shown cases which might cause difficulties in starting in
cold weather, owing to lack of front-end volatility (low boiling-point
fractions), but, in general, this yellow gasoline should be usable in
all automotive equipment which has an octane requirement of 75 or less.
Gasoline containing alcohol is deleteriously affected by even small
quantities of water mixed with it.
b. Lubricating Oils from a German Pz Kw 3
(1) Engine Oil
This has a high viscosity-index (95) and a low pour-point (below 0° F). It
is intermediate between SAE 30 and SAE 40 in viscosity grade, but rather
nearer to the latter.
(2) Gear Box Oil
This is probably a straight mineral-oil product with an original viscosity
approximating that of an SAE 140 gear lubricant.
c. Final Drive Oil
This is probably a compounded lubricant, of viscosity grade similar to
Hypoid 90 with a pour-point below 0° F.
d. Shock-Absorber Fluid
This is a straight mineral-oil product of rather lower quality than
normal light, non-freezing, mineral oil of low viscosity, but within
the limits of the specification of this oil as regards specific
gravity and viscosity index.