[QUOTE=semtex;285750]The word ester does not appear for any of their three synthetic 5W-30 formulations. You said you did the research, so please show us EXACTLY where Mobil claims that their 5W-30 formulation -- any of them -- contain esters.
These links go directly to the Product Data Sheets for each of their synthetic 5W-30 formulations.
Mobil 1 5W-30
Mobil 1 High Mileage Oils
Mobil 1 ESP Formula 5W-30[/QUOTE
https://www.mobiloil.com/USA-English...n_Engines.aspx]
"We have not been able to get much information on the Nissan Ester Oil but our analysis indicates that it is part or full synthetic oil. Many synthetic oils, including Mobil 1, contain a variety of synthetic fluids, and usually this includes esters."