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Which 30 Weight Oil Do I Use, 0W-30,
5W-30 or 10W-30?
Which 30 Weight Oil Do I Use, 0W-30,
5W-30 or 10W-30?
We get asked this question so
often that we have included this special page dedicated exclusively to
answering the question.
AMSOIL 0W-30, 5W-30 and 10W-30 synthetic motor oils are ALL 30 weight
oils. The answer is that ANY one can be used regardless if your
vehicle owners manual says to use, for example, a 5W-30. "W" means
winter. In winter weather the 0W oil will flow like a 0W oil, and the 5W
will flow like a 5W oil and a 10W will flow like a 10W oil just until
the engine warms up. In order to understand the differences one has to
first understand that the numerical values given to these various
weight oils are strictly empirical numbers. For example, 0W does not
mean that the oil has no weight. That is one of the reasons why we say
it is strictly an empirical number.
In order to determine the differences between the three oils one has to
look at the kinematic viscosity of each lubricant. The kinematic
viscosity is essentially the amount of time, in centistokes, that it
takes for a specified volume of the lubricant to flow through a fixed
diameter orifice at a given temperature.
Let's compare the kinematic viscosity of the
three AMSOIL lubricants:
AMSOIL 0W-30 is 57.3 cST @ 40 deg. C, & 11.3 cST @ 100 deg. C
AMSOIL 5W-30 is 59.5 cST @ 40 deg. C, & 11.7 cST @ 100 deg. C
AMSOIL 10W-30 is 66.1 cST @ 40 deg. C, & 11.7 cST @ 100 deg. C.
As you can see from the data above the kinematic viscosities are
extremely close. Therefore, whether you use the 0W-30, 5W-30 or the
10W-30 is strictly a matter of choice. With the small differences in
kinematic viscosity you would be hard-pressed to detect these
differences on initial engine start-up without specialized engine test
equipment.
All three oils are excellent motor oils and ANY
one can be used in a vehicle which requires either a 0W-30, 5W-30 or
10W-30 oil as well as in several other engine applications including an
engine which recommends a 5W- 20 oil.
AMSOIL Signature Series 0W-30 synthetic motor oil is one of the best
synthetic lubricants AMSOIL manufacturers for gasoline engine passenger
vehicles and light trucks. The molecular and chemical technology used to
develop this oil was derived from AMSOIL's Racing Oil. It is a 35,000
mile/1-year motor oil. This is the same oil used by numerous police
vehicles and severe duty fleets nationwide. In fact, many national
racing teams use the 0W-30 ( as well as AMSOIL Series 2000 20W-50 Racing
Oil). The extra horsepower and friction reduction from the 0W-30 often
assists a race driver in attaining superior performance. In fact, we
know which race teams use it, but cannot disclose that information.
This leads to the next topic: many people also ask us if the 0W-30 is
too thin a viscosity oil for high ambient temperature operation. The
answer is absolutely not! Thicker viscosity oils are not always
necessarily better since in addition to its' various engine lubrication
functions, an oil must also effectively transfer heat. Only about 60% of
an engines cooling is performed by the engine coolant, and only on the
upper half of the engine. The remaining 40% of an engines cooling is
performed mainly by the engine oil.
Although a vehicle that is recommended to use a 30 weight oil can also
use a 40 weight oil, it is usually not needed. You will gain absolutely
no benefit from using a thicker viscosity oil if it is not needed. The
only time we recommend a 40 weight oil, such as AMSOIL's 10W-40, to a
customer in a passenger car or light truck application is if the
vehicle's engine is excessively worn and consumes oil at a higher than
normal rate or if the vehicle is being used for very severe duty, high
load, high temperature applications.
We hope this brief discussion has answered your questions. If we have
not sufficiently answered your questions or if you would like an
additional explanation or recommendation for your specific application
please email us using the link at the bottom of this page.
Informative Articles:
The
Immeasurable Benefits of AMSOIL Motor Oil
Chevron
15 years Behind AMSOIL; What Constitutes a True Synthetic?
What
Every Lubricant Must Do
Components
of A Lubricant and How are Synthetic Oils Different
Castrol
vs. Mobil: Synthetic Motor Oil Gets All New Semantics
Just
Say No to Aftermarket Oil Additives
AMSOIL
Proven Best: The History Behind "First In Synthetics"
Oil Color
Auto Industry's Best Kept Secret
Myths about Synthetic Lubrication
Satisfied Customers
API Licensing
Ford PowerStroke Owners
Information
Dodge Cummins Turbo Diesel
Information
AMSOIL
2-Stage Air Filter vs. Competition
Which 30w Oil to Use
Synthetics,
Slipperiness, and Wet Clutches
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AMSOIL
is the undisputed leader in synthetics.............
Since 1972,
AMSOIL Synthetics have
proven to be the BEST.
AMSOIL also engineers and manufactures Ea Oil Filters
with Nanofiber Technology which have a 25,000 mile/1-year
service life as well as specialized filtration systems for
commercial and fleet applications in cars and light, medium and
heavy trucks which can filter particles down to less than one
micron (a standard full flow oil filter can only filter to 20-25
microns, and at a reduced efficiency) making oil changes
virtually unnecessary and virtually eliminating engine wear.
These filters have been proven by millions of miles of over-the
road trucks, construction equipment and fleet service.
-
AMSOIL saves you time and money.
-
The only 25,000 mile/one- year and
35,000/one- year motor oil in the world.
-
Exceeds the most stringent
performance specifications of all major U.S. and foreign
automotive and truck manufacturers.
-
Provides up to two-times the wear
protection of other motor oils.
-
Increases the life of your vehicle.
-
Improves performance, fuel economy
and efficiency.
-
Diesel oil and filtration products
designed to deliver 1,000,000 miles for over-the-road trucks
before engine overhaul.
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Used by many national racing teams,
fleets, police departments, construction firms and trucking
companies.
To Sell AMSOIL in Your Store or
Purchase For Use in Your Businesses Equipment
Factory Direct Catalog Request
Form |
Superior Oils and Lubricants
ken@oilsandlube.com
Phone 918-269-0081
Toll Free 1-877-237-6323
8555 E. Wesson Ct., Claremore, OK. 74019
AMSOIL Synthetic Motor Oils
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