1.Q.. What makes Varouh Oil,Inc. Products
A..Varouh Oil, Inc starts from the beginning with
good relationships with the major oil companies who supply us with superior
base oils. Through these relationships and dealing with reputable chemical companies
we have developed unique additives that meet current specifications, as well
as upcoming specifications before they are required. This is how we have met
all of the following standards. API SF/CD in all grades API SG/CD API SH/CD
API SJ ILSAC GF-1 ILSAC GF-2 Energy Conserving II SAE 5W-30 and SAE 10W-30 Our
unique additives provide excellent viscosity and thermal protection properties
to our formulations. Our research laboratory, where all oils are developed,
is maintained to high standards. This assures that the procedures we use to
develop products are properly documented and have the highest consistency. Varouh
Oil, Inc. specifies, and therefore controls the quality of its base stocks.
We are continually attending seminars and classes with major oil suppliers who
produce the high quality pure base stocks we require. Varouh Oil Inc. has sales
representatives, packaging plant, and distribution center to get the quality
product you need when you want it.
2.Q..What happens if API GL-5 gear oil is
used in an API GL-4 gear oil application? API GL-4 and API GL-5 products typically
use the same extreme pressure (EP) additive system, with the API GL-5 having
about twice the concentration of a API GL-4?
service, these additives become active under extreme load and temperature when
the protective oil film can be squeezed away. EP additives work by forming wear-resistant
compounds with the metal of the gear tooth surface. As the gears mesh, these
compounds shield the gear teeth from direct metal-to-metal contact that would
cause wear and damage to the gears. If too little of the active additive is
present, proper protection would be compromised. Too much of this additive could
cause excessive chemical corrosion of the gear surface. If an API GL-5 gear
oil is used in a application where API GL-4 gear oil is called for, chemical
corrosion of "yellow metal" components may occur, such as bronze synchronizers,
brass bushings, etc. This may lead to shifting difficulties or shortened equipment
3.Q.. What are the GLS products and why
doesn't Varouh Oil, Inc. have equivalents?
A..GLS stands for Gear Lubricant Special and this is usually a product
available only from the original equipment manufacturers. General Motors has
several GLS products, and various other manufacturers also have their own.
4.Q.. Does Varouh Oil, Inc.'s products have
paraffin's which cause sludging while other brands don't? A..Sludging
is prevented by, not caused by, the use of paraffinic oils. Varouh Oil, Inc.
as well as all other major motor oil producers use paraffinic base oils to produce
motor oil. This type of base oil has advantages over the other types of mineral
oil available, which is why they are universally used. The only exceptions are
synthetic motor oils, which of course cost much more than mineral oil based
motor oils. Synthetic base stocks are 100% paraffinic. Technically, paraffinic
oil is a term used to describe the chemical structure, not the wax content.
Through dewaxing in the refinery and the addition of pour point depressants
during blending any harmful effects of wax are eliminated or neutralized.
5.Q.. How does a VI improver thicken at
high temperatures but not thicken at low temperatures?
A.. VI (Viscosity Index)
improver can be thought of as a very long string which at low temperatures is
tightly coiled into a small ball and floats suspended in the oil with little
effect on the viscosity of the oil. At high temperatures this ball expands and
uncoils and encloses a much larger volume of oil within its structure. This
effectively prevents the oil from thinning because of the greater volume taken
up by the expanded balls of VI improver molecules.
6.Q.. What is TBN?
A..TBN stands for Total
Base Number. It is a measure of the ability of an oil to neutralize the acids
that enter the crankcase as byproducts of combustion. A base neutralizes an
acid, so the higher the TBN, the more acid can be neutralized. With today's
low sulfur fuels, TBN is not as much of an issue as it was several years ago.
7.Q.. Why do we really need lighter viscosity
A..Most late model engines were designed to use lighter viscosity oils
compared to older models, which required a thicker film of oil to provide proper
separation of parts, such as main bearings from the crankshaft. Oil passages
were larger to accommodate these thicker oils. To take advantage of the fuel
economy benefits of lighter viscosity oils (SAE 5W-30, SAE 10W-30), late model
"low friction" engines are designed with smaller oil passages and film thickness
requirements. Lighter viscosity oils also flow much more quickly at engine startup
especially in cold weather. Severe engine wear can result if oil fails to circulate
rapidly to critical areas. Lighter viscosity oils also circulate more efficiently
through the engine and remove heat faster.
8.Q.. What is the relationship between the
API GL specifications and limited-slip?
A..A gear oil suitable for limited
slip applications (listed as GL-5* or HP* in Chek-Chart Lubricant Recommendation
and Capacities Guides) is an API GL-5 gear oil containing limited slip additive.
This is a requirement for most differentials with limited slip traction control.
9.Q.. What is the difference between DEXRON®-II
and DEXRON®-IIE? What about DEXRON®-III?
is an automatic transmission fluid specification from General Motors and is
an upgrade and replacement for DEXRON®-IID, with the major difference being
far superior low temperature flow properties. There is also improved high temperature
oxidation and wear protection. This product was necessitated partly to facilitate
shifting at low temperatures in electronically controlled transmissions. DEXRON®-III
is the latest automatic transmission fluid specification issued by GM, and fluids
meeting this specification can be used in all GM ATF applications including
those calling for DEXRON® through DEXRON®-IIE. The enhanced frictional characteristics
of DEXRON®-III are different than previous automatic transmission fluids and
have been developed to provide smoother shifting for a longer period of time.
10. Q.. What does AAMA that I see in some
of the pages of my new vehicle handbook stand for?
It stands for American Automobile Manufacturers Association.
11. Q.. What does ASTM stand for?
It stands for American Society for Testing and Materials.
12. Q.. What does ASLE stand for?
A.. It stands for American Society of Lubrication Engineers. This society
is now known as the Society of Tribologists and Lubrication Engineers (STLE)
and have published standards for machine tool lubricants.
13. Q.. What does Blending oils mean?
A.. It is the process of mixing lubricants or components for the purpose
of obtaining the desired physical and chemical properties.
For more information on these and other topics, remember,Varouh
Oil, Inc.'s Technical Service is only a
phone call away -
1- 440- 324-5025.
Varouh Oil, Inc.