A 5w20 should generally be more shear stable and contain less VII’s than a 0w20 counterpart within the same oil family (meaning brand/chemistry being equal/similar). I’ve been wondering about the Mobil 1 EP 5w20 vs 0w20. The 0w20 is 70% PAO and has a NOACK of 10%, which is outstanding for a 0w20. The HT/HS of the 0w20 is 2.7 and the VI is 173. The M1 EP 5w20 on the other hand is 30% (maybe more?) PAO per the MSDS, has a HT/HS of 2.75 and a VI of 161.
My car has seen a steady diet of the EP 0w20 and never shows any sign of any oil loss at all over a 8k OCI. Unfortunately I have not done a UOA yet on this car/engine oil to compare results. I’m tempted and curious to see if the 5w20 EP would compare to the 0w20. I’m also wondering if the NOACK is as good or better. It’s hard to say being the base oil blends are so different. The VI of the 0w20 is much higher, but that could be a result of the higher level of PAO.
Mobil also did some extensive testing on the 0w20 running it in two cars up to 210,000 miles and doing a tear down. Both were 15k mile drains. Results were very good, per XOM.
I prefer to use an oil that has a low NOACK, less VII'ers and a lower VI.
Mobil 1 oils tend to have good VI due to the naturally higher VI of the Synesstic™ Alkylated Naphthalenes used in their oils. AN's are categorized within the V group.
As Tooslick would say, I'm picking nits here....
My car has seen a steady diet of the EP 0w20 and never shows any sign of any oil loss at all over a 8k OCI. Unfortunately I have not done a UOA yet on this car/engine oil to compare results. I’m tempted and curious to see if the 5w20 EP would compare to the 0w20. I’m also wondering if the NOACK is as good or better. It’s hard to say being the base oil blends are so different. The VI of the 0w20 is much higher, but that could be a result of the higher level of PAO.
Mobil also did some extensive testing on the 0w20 running it in two cars up to 210,000 miles and doing a tear down. Both were 15k mile drains. Results were very good, per XOM.
I prefer to use an oil that has a low NOACK, less VII'ers and a lower VI.
Mobil 1 oils tend to have good VI due to the naturally higher VI of the Synesstic™ Alkylated Naphthalenes used in their oils. AN's are categorized within the V group.
As Tooslick would say, I'm picking nits here....