Quote:
Originally Posted by endless_pain
100 percent synthetic only uses base IV and V synthetic base oils while "Full Synthetic" can use as little or less of 10 percent of a IV base mixed with mineral based oils (I, II and III) and still be called "synthetic" thanks to Castrol back in 1999.
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According to this if you have an oil that uses primarily group IV and V base stocks, with a small amount of Group III base stocks, then it is not "Full Synthetic".
The only thing that I asked you to do is show me where you found these guidelines and your reply was that it's all over the internet. Sort of senseless to debate this though as someone above that used to work in the industry stated the great debate over "synthetic" vs "full synthetic" is dead anyway.
This same sentiment can be seen in posts from other oil blenders at bitog as well as an oil blender that used to post in this forum. And unless you are an oil blender for a company, you really don't know what the entire make-up of any oil is.
I'm aware that Exxon Mobil uses Group III base stocks (their proprietary base stock called Visom), and that Mobil1 0W40 used to be primarly Visom, but nobody on here knows much about the specifics of any of their base stock blends.
And every Mobil1 oil isn't blended the same way either. They use a mix of various base oils and one "synthetic" oil
may be predominately Group IV/V and another
may be a mix of Group III+ and IV, or whatever.