I agree with light weight oil comments although HTHS is importent re wear, but the following re MB indicates this but 0W40 M1 is top product for say 25-30k mile 2yr OCI, which indicates additive package is up to scratch for top class machinery including SLR-McLaren
recommended OCI based are still based on absolute longest wear, although the oil choice may be influenced by fuel economy?
Although most oil companies do not directly advertise their base those promoting top quality oils emphasise the base oil usually esters. The benefits of using esters are at the extremes as as expensive not used in any quantity for road oils. However they can be used instead of mineral oil as additive carriers. The claims by Synlube ignore this aspect and hide behind "formula are proprietary " with regard to base oils since they do not need to disclose exact mix, this is somewhat perplexing compared to Redline who are open about this matter to develope niche market.
A warranty based on very few cars having Synlube as first fill can easily be made.