This page deals with Mobil-1 brand oils
The Mobil-1 Advanced Full Synthetic (AFS) oil performs very poorly.
N/A = NO ADDITIVES
M# = SQUID INK ADDITIVE MIX VARIATION
C# = CUSTOM MIX, SEE UNDER CHARTS FOR MORE DETAILS
Advanced Full Synthetic 15W50
Recommended blend: M17
SLR-3 Scoring ---
- N/A: 79.36
- M9: 83.93
- M17: 91.85
Mobil-1 Advanced Full Synthetic (AFS) 15W50 performs quite well, but does not react as well to additives as many other oils. Testing was limited with less than 100 mL available. More testing is planned in the future.
High required power and operating temperatures marred the otherwise good results and relegated the score to a slightly above average 79.36 for the base oil, with an improvement to 83.93 using SQUID INK blend M9, and a very respectable 91.85 using SQUID INK blend M17 by lowering operating temperatures and required power (see graph below).
There was significant reduction in operating temperature and required power at the 120 minute mark using M17, suggesting that overall performance increases as the friction modifying layers are deposited onto the moving components. Without using M17, an external oil cooler is recommended with the 15W50 blend. When using M17, an external oil cooler is not necessary.
AFS Extended Performance 5W30
Recommended blend: M1 or M12 PLEASE READ FIRST
SLR-3 Scoring ---
- N/A: No score.
- M1: No score.
A very poor performing oil, it would seize the testing machine if the load weight was not eased into over 60-90 seconds (all other oils were full load within just a few seconds). Its maximum loaded start was about half of most other oils.
It became a pain to test this because it wore through the test cylinders down to the clamp, meaning the machine had to be stopped before the full 120 minutes were completed. Very little testing was done in the end due to the effort and time involved. The loss of material in sanding and polishing the rotating wheel enough to remove the huge gouges left in it became too consuming. Avoid this oil!
The temperature sensor was replaced after the M1 test as temperatures were well outside of expected range. Retesting is unlikely due to the poor overall function of this oil. Consider the low temperatures of the M1 test lightly.