After reading this post and other post about generator oils I decided to change mine out from Mobil 1 10/30
synthetic oil, Over to Amsoil 10/30 Small Engine synthetic oil. I read that the Mobil 1 has taken some of the chemicals out of the oil over the years to make it more eco friendly. The Amsoil small engine oil is formulated to better cool and lubricate small air cooled engines and is not stripped down of its beneficial qualitys that make synthetics superior to dino oil.
It may be nothing more than BS, but I needed to change all my generators oil and the Amsoil dealer cut me a better deal than I could get the Mobil 1, so why not try it.
I bought a case of the Amsoil so as to have plenty on hand for all my small engines.
Both my EU2000's gets the Amsoil.
Both my EU 1000's get the new Amsoil also.