thank you sir.
i see....as you said.
what i would like to understand is, do we really have to use those standards to decide what oil we use in the gear box (transmission)? and we use the term to include the differential too?
i mean, the gear oils of SAE J306?
this does NOT match with the data for gear box (transmission) in the car manual, which to me, is what we have to use instead of whatever any1 brings.
in the manual, this is what we are told to use in parts other than the engine:
2-automatic transmission: only use ATF approved to MB 236.10, MB 236.12
3-manual transmission fluid: only use fluid approved to MB 236.2. SAE 5W-20 engine oil, meeting API SL or GF-3
4-rear axle fluid: only synthetic SAE 75W85 axle lubricant that meets MB 231.1
notice: all say "only"
these specifications are for oils of multiple numbers (like 75W85), and the SAE J306 specs are for single number, so i think if only for this, it does not match.
but mainly, these SAE J306 specs are not the same as those mentioned in the manual.
would any1 trade the specs of the manual for anything else?