AMSOIL 0W-30 is 57.3 cST @ 40 deg. C, & 11.3 cST @ 100 deg. C
AMSOIL 5W-30 is 59.3 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 0W-30, 5W-30 or the 10W-30 is
strictly a matter of choice. With the small differences in the kinematic
viscosity you would be hard-pressed to detect these differences on initial
engine start-up without specialized engine test equipment.
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.
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 the 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.
T's Advanced Synthetics
Greg and Marcy Thurman
Your Nationwide
AMSOIL
Authorized Independent
Dealer
Nationwide US Warehouses,
Canada and Palm Harbor, FL
727-798-8552
E-Mail:
greg@tsadvancedsynthetics.com
If you
experience problems or have questions or comments about
our website please email us at
greg@tsadvancedsynthetics.com
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