Viscosity index
Definitions
A measure of an oil's resistance to changes in viscosity due to temperature fluctuations.
Gerry community context
Related mailing-list messages and current discussions from Gerry. These are community context for the dictionary term.
- Re: vanagon Digest - 5 Feb 2007 to 6 Feb 2007 - Special issue
(#2007-165)
Historical mailing list · Tue, 6 Feb 2007 11:59:45 -0700
...Synthetic lubes can be extended for both extremes as not only do they have better viscosity indexes, they do not have the waxes that...
- Re: should 10W-40 be avoided?
Historical mailing list · Sun, 15 Oct 2000 17:32:54 EDT
...40 with no viscosity index improvers but uses some in the 10W-40 and 5W-30. Mobil 1 uses no viscosity improvers in their...
- should 10W-40 be avoided?
Historical mailing list · Sun, 15 Oct 2000 15:40:49 -0300
...20W-50 is the same 30 point spread, but because it starts with a heavier base it requires less viscosity index improvers (polymers) to...
Related Terms
- ViscosityEngine and fuel systems
A measure of an oil's thickness and flowability.
- Bypass filterEngine and fuel systems
A type of filter that allows oil to bypass the main filter and flow directly to the engine.
- dry-sump engineEngine and fuel systems
Engine type where oil is stored in a separate tank, not in the crankcase.
- oil drain plugEngine and fuel systems
plug that allows for the drainage of engine oil
- oil filterEngine and fuel systems
device that filters the engine oil
- Oil pressure gaugeEngine and fuel systems
Instrument that measures oil pressure