transmission flush fluid choice
05-28-2012, 10:54 AM
#51
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2001 C320 Automatic
Ordered 12 quarts from ryder . They didnt deliver after 3 days called every other hour complaining .... They sent me 2 x 12 quarts so now im set . Also why does shell post semi synthetic on there containers ?
05-28-2012, 11:19 AM
#52
Super Moderator
It's just Shell being honest & living by the European definition of what one may term synthetic vs. the US definition which is different.
All these fluids are by German definition semi - synthetic.
As one goes up in base oil classification i.e. Group II & above so additive miscibility in the BO becomes a greater challenge.
So to achieve a balanced product with the desired characteristics we make the majority of the base oil VHVI synthetic for the viscometrics & oxidation stability we require while using a proportion of petroleum derived base oil to act as a co-solvent to get the additives into the blend & achieve stability.
So - semi-synthetic!
All these fluids are by German definition semi - synthetic.
As one goes up in base oil classification i.e. Group II & above so additive miscibility in the BO becomes a greater challenge.
So to achieve a balanced product with the desired characteristics we make the majority of the base oil VHVI synthetic for the viscometrics & oxidation stability we require while using a proportion of petroleum derived base oil to act as a co-solvent to get the additives into the blend & achieve stability.
So - semi-synthetic!
