INTAKE 
COMPRESSION 
POWER 
EXHAUST 
Piston moves downward. 
Worn ring at top of groove. 
Piston moves upward. Worn 
ring at bottom of groove. 
Piston moves downward. 
Worn ring at top of groove. 
Piston moves upward. Worn 
ring at bottom of groove 
NO 
Heavier Oil can never replace 
metal worn away 
Y ou are sometimes ad¬ 
vised: “As your auto¬ 
mobile engine becomes worn 
use a heavier oil." Heavier 
oil,some people will tell you, 
provides a better seal forclear- 
ances enlarged through wear. 
But first consider these 
facts: 
As your car grows older, 
metal is worn away by the 
wear between moving surfaces, 
oil replace this lost metal? NO. 
WORN RINGS 
cause Carbon Deposits 
Worn piston rings move per¬ 
ceptibly upward on the down 
stroke of the piston; the oil ac¬ 
cumulates under and behind the 
rings. The./ as the piston moves 
upward the rings move to the 
bottom of the recess, forcing the 
oil by the rings. This is some¬ 
times termed “oil pumping.” 
The oil ultimately reaches the 
combustion chamber causing 
carbon deposit. 
Will heavier 
The' oiling system of your engine was de¬ 
signed specifically to circulate lubricating oil 
of a certain body. Will this oiling system— 
pump, screen, oil pipes, etc.— distribute as 
effectively a heavier oil ? NO. 
Any oil, whether heavy or light, when 
used in worn engines will work past the pis¬ 
tons and piston rings and enter the combus¬ 
tion chambers, forming carbon. The heavier 
the oil, the more aggravated will usually be 
the carbon deposit. 
viously, have the hearings 
adjusted, have new pistons 
and piston rings fitted, and 
continue to use the correct 
grade of oil fop which your 
engine and oiling system were 
designed . 
This whole subject of en¬ 
gine wear and heavier oils is 
dealt • with in our folder, 
“Lubrication — Its Relation 
to Engine Wear." Rather than invite addi¬ 
tional repairs and trouble through the use of 
too heavy oil, it will pay you to write to our 
nearest Branch for a copy of this paper. 
What are the wise and only 
proper measures to take when 
your engine is badly worn? Ob- 
0 r^Gci^ 
The Correct Oil for your car—during its entire 
life—is specified by the Gargoyle Mobiloils Chart 
of Recommendations. 
If your car is not listed in the partial Chart 
shown here, consult the complete Chart at your 
dealer’s, or send for booklet, “Cor¬ 
rect Lubrication,” which lists the 
correct grades of Gargoyle Mobiloils 
for all automobiles, tractors and 
motorcycles. 
Mobiloils 
A grade for each type of motor 
T 
Chart of 
Recommendations 
(Abbreviated Edition) 
How to Read the Chart: 
HE- correct grades of Gargoyle Mobiloils for 
engine lubrication of both passenger and com¬ 
mercial cars are specified in the Chart below. 
A means .Gargoyle Mobiloil “A’* 
B means Gargoyle Mobiloil “B” 
E means-Gargoyle Mobiloil “E.’* 
Arc means Gargoyle Mobiloil Arctic 
Where different grades arc recommended for summer 
and winter use, the winter recommendations should 
be followed during the entire period when freezing 
temperatures ’ may' be experienced. 
The recommendations for prominent makes of engines 
used in many cars arc listed separately for convenience. 
The Chart of Recommendations is compiled by the 
Vacuum Oil Company’s Board of Automotive 
Engineers, and represents our professional advice on 
correct automobile lubrication. 
1921 
1920 
1919 
1919 
1917 
NAMES OF 
At rOMOBII.rS AND 
k 
V 
<- 
o 
E 
o 
JJ 
MOTOR TRUCKS 
F 
C 
E 
c 
F 
c 
F 
c 
F 
C 
a 
05 
S 
a 
05 
> 
a 
05 
■s 
a 
o; 
p” 
3 
05 
A 
A 
A 
Arc 
A 
Arc 
A 
Arc. 
A 
A 
A 
A 
A 
A 
A 
A 
Arc 
Arc. 
Arc. 
Arc. 
A 
Arc. 
Arc. 
Rcll (York, !».. . 
A 
Arc 
Arc 
A 
Arc 
Arc 
Biddle . 
B 
A 
B 
A 
B 
B 
Arc. 
Arc. 
Arc 
Bnirk .. 
Arc. 
Arc 
Arc 
Arc. 
Arc. 
Arc. 
Arc 
A 
A 
Arc. 
Chandler Six. 
Arc. 
Arc 
Arc 
Arc. 
Arc. 
Arc 
Arc. 
Chevrolet (8 cvJ.). 
A 
A 
A 
(MfideM90). 
Arc. 
Arc 
Arc 
Arc. 
Arc 
Arc. 
Arc. 
Arc 
* AH Other Model*.... 
A 
A 
Arc. 
A 
Arc. 
A 
Arc 
A 
A 
Collier . 
Arc. 
Arc. 
Arc 
Arc. 
A 
Arc. 
A 
Arc 
A 
Arc. 
Crawford. 
Arc. 
Arc. 
Arc 
Arc. 
Arc. 
Arc. 
Arc. 
Arc 
Arc. 
A 
A 
A 
A 
A 
A 
A 
Dart (l'ton). 
A 
Arc. 
Arc. 
Arc. 
A 
Arc. 
A 
“ All Other Model;. 
A 
A 
A 
A 
Arc. 
Arc. 
Arc. 
Arc*. 
Arc. 
Arc. 
Dodge Brother-.. 
Arc. 
.Arc. 
Arc. 
Arc. 
Arc. 
Arc. 
Arc. 
Arc. 
Fnc (Erie, Pa.). 
A 
A 
A 
A 
Arc. 
Arc. 
Arc. 
Arc 
Arc. 
/Arc. 
E 
E 
F. 
E 
E 
E 
E 
E 
E 
E 
A 
A 
A 
A 
A 
A 
A 
.Arc. 
Arc. 
Arc. 
Arc. 
Arc. 
Arc. 
** (Co'm’Jj (Model 12)...’.. 
A 
•* ” All Other Mods 
Hanson Six. 
Arc. 
Arc 
Arc. 
Arc. 
Arc. 
Arc. 
. r 
Arc. 
Arc. 
Arc. 
Aro. 
Arc. 
A 
Arc. 
A 
A 
*' (12 cyl.). 
A 
A 
■Arc. 
Hollier (6c>?)... 
Arc. 
Arc. 
Arc. 
A 
Arc. 
A (Arc. 
“ (8 cyl.).. 
A 
A 
A 
B 
A 
Hudson Super Six. 
Arc. 
Arc. 
Arc. 
Arc. 
Arc. 
Arc. 
Arc. 
Arc. 
Arc. 
Arc. 
A 
A 
A 
A 
A 
** <5 ton). ... 
Arc. 
Arc 
Arc. 
Arc. 
Arc. 
.Arc. 
**- AllOthcr Models.... 
A 
A 
A 
Arc. 
A 
A 
A 
A 
Arc 
A 
.Axe. 
fArc. 
’ OK ton). 
A 
Arc. 
A 
(2 ton). 
*’ <5 ton). 
A 
A 
A 
A 
A 
A 
A 
A 
A 
Arc. 
A 
Arc. 
A 
A 
** All Other Models. 
A 
A 
A 
A 
A 
A 
A 
Arc. 
A 
Arc. 
Arc. 
A 
Arc. 
A 
Arc. 
Ak. 
Arc 
Arc. 
A 
.Arc. 
Arc. 
•' *' All Other Models... 
A 
Arc. 
A 
Arc. 
A 
Arc. 
A 
A 
Lexington (Continental Eng.).. 
Arc. 
Arc 
Arc. 
Arc. 
Vrc. 
Arc 
Arc 
Arc. 
Arc. 
Liberty. 
Arc. 
Arc. 
Ate. 
Arc 
A K. 
Arc. 
Arc. 
Arc. 
Arc. 
Arc. 
E 
A 
'A 
E 
Arc. 
A 
E 
Arc. 
Arc. 
A 
E 
Arc. 
Arc. 
E 
E 
Arc. 
Arc. 
McFarlan.,. 
A 
A 
A 
A 
A 
A 
A 
A 
. •• (8 cyl.). 
Waibohm.. 
Arc. 
A 
Arc. 
A 
Arc. 
A 
Arc 
A- 
Arc 
A 
Arc. 
Maxwell.✓.... 
A 
Arc. 
A 
Arc 
A 
Arc. 
A 
Arc. 
A 
Arc. 
A 
Arc 
A 
Arc 
A 
Arc. 
A 
Arc. 
A 
Arc 
Mitchell. 
A 
A 
Arc 
A 
Arc 
A 
Art 
A. 
Arc. 
M. 11. M. 
Arc. 
Arc. 
Arc. 
Arc. 
Arc. 
Arc. 
Arc 
Arc. 
Arc. 
Arc 
Arc 
Arc 
A 
A 
** (Commercial; iCLad)- 
A 
A 
A 
Arc 
A 
A 
A 
A 
Arc. 
Arc. 
A 
Arc. 
A«c. 
Arc 
Arc. 
A 
“ (12 cyl.). 
A 
A 
A 
A 
A 
A 
Arc 
Arc. 
Arc 
Arc. 
Arc. 
Old Hickory. 
Arc. 
Arc 
Arc. 
Arc. 
Arc. 
Arc. 
A 
Arc. 
A 
Arc. 
A 
Arc 
Arc. 
Arc. 
Arc. 
Arc. 
A 
A 
A 
A 
Arc. 
Arc. 
©shko'h. 
A 
Arc 
Arc. 
Overland... 
A 
A 
Arc. 
Arc. 
Packard.. 
A 
A 
\ 
A 
A 
Arc 
Arc. 
Arc. 
Arc. 
Arc 
Arc 
Ajc. 
A 
A 
A 
“ All Other Model*.,... 
J 
Arc. 
Arc. 
Arc. 
A 
Pierce-Arrow... 
A • 
A 
A 
A 
A 
A 
A 
A 
A 
“ “ (Corn'll (5 ton). 
A 
A. 
A 
A 
'a 
A 
Arc 
Arc. 
Arc. 
“ All Other Mod*. 
A 
A 
Arc 
Arc. 
Arc. 
Arc. 
Arc. 
Arc 
Arc. 
A 
\ 
Arc. 
Arc 
A 
Arc. 
Arc. 
Arc 
Arc. 
Arc 
“ All Other Models. 
Arc 
Arc 
Arc. 
Arc. 
A 
Arc 
A 
Arc. 
A 
Arc. 
Arc 
A 
Arc 
A 
Arc. 
A 
Arc 
Arc. 
ReVcrc -.. i. 
A 
A 
A 
A 
R & A Kmght . 
B 
A 
B 
A 
A 
A 
Arc. 
Arc. 
Arc. 
Arc. 
Arc 
“ All Other Models..... 
Arc. 
Arc. 
Arc 
A 
A 
A 
A 
Arc. 
E 
A 
A 
Arc 
Arc. 
Arc. 
A 
Arc 
Arc 
Arc. 
Arc. 
Arc. 
*' • All Other Model*. 
Arc. 
Arc 
Arc. 
Arc. 
Arc. 
Arc. 
Singer.. 
A 
A 
A 
A 
A 
A 
Standard Commercial (Detroit) 
Arc. 
Arc 
Arc 
Arc. 
Arc. 
Arc. 
Arc. 
Arc. 
B 
\ 
B 
B 
B 
A 
A 
Arc. 
A 
Arc. 
Arc. 
Arc. 
Arc. 
A 
Arc 
Studebakcr.. 
A 
Arc. 
A 
Arc 
A 
A 
A 
A 
A 
A 
A 
A 
A 
A 
Arc 
A 
A 
A 
A 
A 
A 
A 
' “ All Other Model,. 
Arc. 
Arc 
Arc. 
Arc. 
Willw-Knighl .. 
L 
,\ 
B 
A 
It 
B 
A 
Willy* Six.. 
Arc. 
Arc. 
Arc, 
Arc 
Arc. 
V‘il <x 
AVinton........ 
Arc. [Arc 
Arc. 
Arc 
Arc.|Arc. 
Arc.[Arc 
,Arc.(Arc.- 
Prominent Ma 
ces o 
Engines 
Beaver (Models J-IA-JB andJC' 
A 
A 
A 
A 
A 
A 
A 
A 
A 
Ate 
\ 
Arc. 
Arc 
Art 
A 
Arc. 
Hilda (Model. ATC-BTU-CTU-; 
DTU-FTU-KTl -HIMM U-IL-. 
A 
A 
A 
A 
A 
A 
A 
A 
A 
A 
ITU-XU-.\Tl'-YU-YTU...I 
Buda All Other Model-.. 
A 
•\ r c 
A 
Arc. 
A 
^Arc. 
A 
Arc. 
Arc, 
A 
A 
A 
A 
“ (Model T) . 
Arc. 
Arc. 
Arc 
Arc 
Arc. 
Arc. 
“ All Other Model*.. 
Arc. 
Arc 
Arc. 
Arc 
Arc. 
Arc. 
Arc 
<;. B &S. (Model A A)_ 
A 
A 
A 
A 
A 
A 
All Other Models... 
Arc. 
Arc. 
Arc. 
Arc. 
Art 
Arc. 
Arc 
Arc. 
Arc. 
(Model* H'-S-V and VA 
A 
A 
A 
\ 
Arc. 
A 
Arc. 
Arc. 
A 
A 
A 
A 
A 
A 
Arc 
A 
Arc. 
Arc. 
Arc. 
Arc. 
Ate. 
A 
Arc 
A 
V All Other Model.... 
A 
A 
A 
A 
A 
A 
A 
A' 
A 
A 
A 
A 
Waukesha (Models Ct!-DU- 
f.u & n.:>. 
A 
A 
A 
A 
A 
A 
** All Other Model*.... 
A 
Arc. 
A 
Arc. 
A 
Arc. 
A 
Arc 
A 
A 
A 
A 
\ViMon;'n (Models Q 2c QU;... 
*' AlIOtherModcIs.^ 
A 
Arc 
A 
Arc 
A 
Arc, 
A 
A 
A 
Ji 
A 
A 
4- 
A 
A. 
.A. 
DOMESTIC BRANCHES. 
New York (Main Office) Philadelphia Detroit Minneapolis Kansas City, Kan. Boston Pittsburgh Chicago Indianapolis Das Moines ’ Buffalo 
Dallas 
VACUUM OIL COMPANY 
I 
