As far as OCI intervals, I remain convinced that OEM recommendations do not envisage the longest possible engine life.
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.
Would you please redo this paragraph? I am not sure what it means. Thank you.