Here is a direct comparison between Mobil 1 EP 0w-20 and Amsoil Signature Series 0w-20 oil. Both in use for 1 year, 70% Hwy, 30% city.
Both had 1/2 quart makeup oil added over the interval. Both very good oils with similar TBN retention. The only difference to notice is the small increase in iron for the M1 sample as compared to Amsoil.
Code:
miles on oil 9,816 9,538 7,780 5,842 6,358 Universal
miles on unit 101,611 91,795 82,257 74,477 68,635 Averages
sample date 9/16/2016 08/30/2015 08/26/14 10/26/13 03/10/13
make up oil added 1/2 1/2 1/3 0 0
OIL Type M1EP 0w-20 ASM 0w-20 ASM 0w-20 MC 5w-20 HG 5w-20
Aluminum 3 3 3 2 2 3
chromium 1 0 0 0 0 0
iron 9 6 6 4 5 9
copper 1 1 1 2 2 2
lead 0 0 0 1 0 1
tin 0 0 0 0 0 1
molybdenum 82 135 116 23 43 73
nickel 0 0 0 0 0 0
manganese 1 1 1 1 0 1
silver 0 0 0 0 0 0
titanium 0 0 0 0 0 1
potassium 0 1 8 0 4 2
boron 34 64 74 49 3 46
silicon 20 18 19 15 9 12
sodium 14 15 8 0 3 48
calcium 1447 3387 3434 2283 2192 2026
magnesium 592 11 16 12 14 213
phosphorus 557 592 676 760 688 684
zinc 695 729 770 794 799 806
barium 0 0 0 0 0 0
SUS viscosity @210F 52.0 54.8 53.9 48.2 49.5
cSt viscosity @100C 7.88 8.70 8.45 6.72 7.12
Flashpoint 375 350 430 380 375
Fuel %
Antifreeze % 0.0 0.0 0.0 0.0 0.0
Water % 0.0 0.0 0.0 0.0 0.0
Insolubles % 0.3 0.2 0.2 0.3 0.3
TBN 3.2 3.3 4.2
TAN
Both had 1/2 quart makeup oil added over the interval. Both very good oils with similar TBN retention. The only difference to notice is the small increase in iron for the M1 sample as compared to Amsoil.
Code:
miles on oil 9,816 9,538 7,780 5,842 6,358 Universal
miles on unit 101,611 91,795 82,257 74,477 68,635 Averages
sample date 9/16/2016 08/30/2015 08/26/14 10/26/13 03/10/13
make up oil added 1/2 1/2 1/3 0 0
OIL Type M1EP 0w-20 ASM 0w-20 ASM 0w-20 MC 5w-20 HG 5w-20
Aluminum 3 3 3 2 2 3
chromium 1 0 0 0 0 0
iron 9 6 6 4 5 9
copper 1 1 1 2 2 2
lead 0 0 0 1 0 1
tin 0 0 0 0 0 1
molybdenum 82 135 116 23 43 73
nickel 0 0 0 0 0 0
manganese 1 1 1 1 0 1
silver 0 0 0 0 0 0
titanium 0 0 0 0 0 1
potassium 0 1 8 0 4 2
boron 34 64 74 49 3 46
silicon 20 18 19 15 9 12
sodium 14 15 8 0 3 48
calcium 1447 3387 3434 2283 2192 2026
magnesium 592 11 16 12 14 213
phosphorus 557 592 676 760 688 684
zinc 695 729 770 794 799 806
barium 0 0 0 0 0 0
SUS viscosity @210F 52.0 54.8 53.9 48.2 49.5
cSt viscosity @100C 7.88 8.70 8.45 6.72 7.12
Flashpoint 375 350 430 380 375
Fuel %
Antifreeze % 0.0 0.0 0.0 0.0 0.0
Water % 0.0 0.0 0.0 0.0 0.0
Insolubles % 0.3 0.2 0.2 0.3 0.3
TBN 3.2 3.3 4.2
TAN