I have been trying to figure out what is the difference between regular M1 and M1 EP (Extended Protection). One thing I noticed is that in 5W-30 and 5W-20, the regular M1 has a significantly lower specific gravity (what M1 calls density) than EP oils of the same weight, and also lower than competitors, and also lower than the other regular M1 oils in different weights.
Are there any experts (seriously, I mean real experts--guesses not allowed) who know whether there is any significance to these differences and how it effects oil performance?
Here is the data taken from manufacturer product or MSDS data sheets:
Specific Gravity, Water = 1.0 (called Density by Mobil)
Mobil 1 5W-30 0.80
Mobil 1 EP 5W-30 0.86
Amsoil 5W-30 ASL 0.8571
Amsoil 5W-30 XLF 0.8524
Castrol Edge 5W-30 0.847
Castrol Syntec 5W-30 0.854
Pennzoil Plat. 5W-30 0.855
Mobil 1 5W-20 0.80
Mobil 1 EP 5W-20 0.86
Mobil 1 0W-20 0.85 (Advanced Fuel Economy)
Mobil 1 0W-30 0.845 (Advanced Fuel Economy)
Mobil 1 0W-40 0.855
Are there any experts (seriously, I mean real experts--guesses not allowed) who know whether there is any significance to these differences and how it effects oil performance?
Here is the data taken from manufacturer product or MSDS data sheets:
Specific Gravity, Water = 1.0 (called Density by Mobil)
Mobil 1 5W-30 0.80
Mobil 1 EP 5W-30 0.86
Amsoil 5W-30 ASL 0.8571
Amsoil 5W-30 XLF 0.8524
Castrol Edge 5W-30 0.847
Castrol Syntec 5W-30 0.854
Pennzoil Plat. 5W-30 0.855
Mobil 1 5W-20 0.80
Mobil 1 EP 5W-20 0.86
Mobil 1 0W-20 0.85 (Advanced Fuel Economy)
Mobil 1 0W-30 0.845 (Advanced Fuel Economy)
Mobil 1 0W-40 0.855