Re: what oil do u recomend?
Your currently using a hydrocracked oil with a tiny percentage of ester to make it polar.
You need a full ester/pao blend if you want the best.
The likes of
Silkolene PRO S and PRO R
For the rest, most are "hydrocracked" oils (petroleum based) and are not true synthetics, they are labelled as such because of the US court case Mobil vs Castrol.
Now, you may ask, why are these special mineral oils called “synthetic”? Well, it was all sorted in a legal battle that took place in the USA about ten years ago. Sound reasons (including evidence from a Nobel Prize winning chemist) were disregarded and the final ruling was that certain mineral bases that had undergone extra chemical treatments could be called “synthetic”.
Needless to say, the marketing executives wet their knickers with pure delight! They realised that this meant, and still does, that the critical buzz-word “synthetic” could be printed on a can of cheap oil provided that the contents included a few percent of “hydrocracked” mineral oil, at a cost of quite literally a few pence.
This changed the labelling of oils forever and muddied what was very clear so today, it's difficult. Price is one way though.