Yeah, that's right Jason. I don't know what I was thinking with longer than year intervals recommended by an oil manufacturer. But I do know I have read about PAOs dealing with water better than polyolesters. Whether it is 100% true fact, I don't know. I did find this on the mobil1.com website however:
Q: Red Line Oil claims to have 100 percent polyolester base stocks. Are these different or better than the base stocks used in Mobil 1 with SuperSyn™?
A: We are very familiar with polyolesters. In fact, we manufacture them and use them in our aviation jet engine oils such as Mobil Jet Oil II® and Mobil Jet Oil 254® and in our refrigeration compressor lubricants, where the polyolesters are utilized for their compatibility with new HFC refrigerants. Polyolesters are indeed excellent at high-temperature oxidation stability and low volatility.
However, our work on automobile engines and jet engine designs has shown that polyalphaolefins (PAOs) offer the best all-around performance for gasoline engines due to their:
* Being completely compatible with conventional oils and gasoline engine seals.
* Providing both low- and high-temperature performance.
* Providing a stable oil in the presence of water and moisture.
* Having anti-rust capabilities.