Oils and Numbers
Submitted: Thursday, Mar 25, 2004 at 21:16
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Wayne (NSW)
This question is directed at Russell from Synforce but if some one else knows the answers than type away.
We all know the difference between a XD9000 and a TX3400 but what are all those letters and numbers mean?
15w/50, 20w/50
75w/80 GL4
CH4, CG4
Ash can I get it from the
camp fire if I run low on a trip, and what about this detergent. Can it be used for the washing up or only for the motor.
Who ever answer, please keep it as simple as possible, some of us were up late last night.
Wayne
Reply By: Member Colin - NSW Bungendore - Thursday, Mar 25, 2004 at 21:46
Thursday, Mar 25, 2004 at 21:46
Wayne
"We all know the difference between a XD9000 and a TX3400"
No - I don't !
I use Valvoline Gold 20/50. It has a moderate level of detergent - this keeps the dirt from the moving parts - I think oil for diesel motors have a higher detergent level?
My understanding is -
The Nos. refer to the viscosity or stickyness of the oil at different temperatures - if we lived in Antarctica we may use a No 10 oil?
The letters after - SG/SI etc refer to the SAE (engineers) standard that the oil meets.
A quick Google search gave me too much data - but this may help.
"Engines need oil that is thin enough for cold starts, and thick enough when the engine is hot. Since oil gets thinner when heated, and thicker when cooled, most of us use what are called multi-grade, or multi-viscosity oils. These oils meet SAE specifications for the low temperature requirements of a light oil and the high temperature requirements of a heavy oil. You will hear them referred to as multi-viscosity, all-season and all-weather oils. An example is a 10W-30 which is commonly found in stores."
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51971