A few years back in the UK Edge obtained a good reputation as a top of the range oil but was only available in a few grades; and it was good. 'Building' on that success the range was expanded and cheapened. It is not universal in that some of the harder to find grades are still true full synthetics but the rest are not but can be called a full synthetic because of case law (a hydro cracked mineral oil can be called synthetic) which was incidentaly brought and won by Castrol in the USA. So you cannot even believe what they say on the cans!