You are correct about the detergents, although 8100 0W-20 is a 100% synthetic, ester based oil.
http://www.motul.com/us/en-US/produc...iscosity%5D=36
There's a new Motul 8100 0W-20 available in Australia and it is likely PAO based.
http://www.motul.com/system/product_...pdf?1339474108
Only the 6100 series is synthetic blend.
http://www.motul.com/us/en-us/produc...%5Brange%5D=25
-Dennis