Originally Posted By: Solarent
Originally Posted By: JHZR2
Curious if anyone has insight to VII use in 0w-20 lubes, particularly between regular, EP and AFE Mobil 1 0w-20.
It seems that some may have a higher PAO concentrations than others, but in curious how that affects the use of VII and the stability of the oil.
Thanks!
It greatly depends on what cuts and types of PAO is being used, as well as which VII. For Example Exxonmobil Chemical has a product called mPAO
Link which is sometimes used to balance out a formulation. Also the type of VII is important. For example I've seen some PAO based 0W20 formulas with as little as 2.5% VII, others with 6-8%. Depending on your desired viscosity curve you can also choose VII that have optimized treat rates (in the 5-7% range) but still hit really high (200+) viscosity index.
Thanks, but I'm trying to get away from generalities. I've tried to find the 0w-20 AFE MSDS without success, and I'm trying to consider the best choice for my car. I suspect that with 90% oil life at 2000 miles, that this oil has the potential to be in use for 20k miles. Since I have a hybrid, the engine sees far more start stop events, and may have a greater challenge in terms of fuel and shearing due to this.
It seems like the EP oil may be my best bet, but we were doing 15k mile ocis on regular M1 10w-30 (with UOA) long before EP came out.
I'm not one who goes chasing value proposition of an oil based upon PAO content, but I am interested in if one uses more Viis than the other.