I definitely do much less spirited driving and less longer drives in the winter.well with the exception of the occasional hoon in fresh snow (ice covered by 6 inches of snow last weekend baby)ДЄccording to my recent reading, the better low temp viscosity and higher VI usually indicate real synthetic (maybe better) base stocks in comparison to some (most) 5w30 'Synthetics' that are ultra refined dino-oil-stocks. I wonder if my car ever really reaches normal operating temps for the oil (I don't have an oil temp guage) during these drives.Д«ut I am sacrificing normal op temp viscosity to stay with the Sustina.and I think (THINK-who really knows) we can all agree that the EJ257 could use a thicker oil at operating temp. In the winter most of my driving is cold start (in garage) - 5.5 miles - cold start (in parking lot at work) - 5.5 miles home. So now I wonder if by going to EFE I am sacrificing startup/cold operating protection. one that is closer to the desired operating temp value) will protect better at cold temps than the lower VI oil because it flows better (more like normal) through the passages. It means that an oil with a better/lower 40C viscosity (i.e. s) viscosity and Mid SAPS with reduced content of Sulfated Ash ( 0.8), Phosphorus (0.07 x 0.09) and Sulfur ( 0.3), or an ACEA C2 engine oil i.e.

The desired 30 wt (the 30 in 5w30) viscosity at operating temp is between 9.3 and 12.5.ДЄ higher viscosity index (VI) is better because it means that at low temps the oil is closer to the desired running viscosity. X-clean EFE 5w30 40C viscosity = 70.1 100C viscosity = 12.1 viscosity index = 169 HTHS = 3.5 I am currently using (but considering going away from to X-clean EFE)Д®neos Sustina 5w30 40C viscosity = 51.5 100C viscosity = 10.3 viscosity index = 194 HTHS = 3.1 Viscosity that is ~25% higher than other oils with an HTHS ~3.0-3.1. One thing that I have noticed is that while the X-clean EFE is a HTHS 3.5 oil it also has a cold

8100 eco vs xclean