Silkoline aint that special and is known to make ur tappets rattle there tits off !!!

Im speaking from experiance here

i used castrol rs for years and no problems with it

also used others with no probs

i think some peeps just enjoy silkoline cos its different colour and looks like blackcurrant juice thats going in and thats cool

oils are good in diff ways and some are better in engines depending on its condition in first place