AMSOIL Signature Series 0w30
- Thread starter GW.
- Start date
Nice Oxidation Number, will Amsoil Signature Series Oil's keep piston rings cleaner than there less expensive line of oils?
Yes the SS has superior piston deposit control.
Thanks for sharing! Added to the VOA Database.
FYI, here is a table I created of 0W-30 alternatives for low temperature applications:
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where did you come up with the, say guess on Mobil 1 Advanced Fuel Economy?? 0w-30 & AMSOIL Signature Series mrv?? ,ccs and mrv are not always related to pour points., lower ccs and mrv in its perspective test temps, (lower is better) are what is only comparable to its intended low temp use. the new SQ,GF-7 oils can be different to the older SP, GF-6 specs.
An MRV of 60,000 and CCS of 6200 are the API limits for the 0W-30 classification. My guess is that when the manufacturers are reluctant to reveal their MRV and CCS numbers (especially in this group of products that is oriented at minimizing MRV and CCS), they probably just managed to squeeze in below the maximums. Mobil 1 EXP is an example of this behavior: they were advertising 6100 for CCS but are no longer advertising any number, possibly because their most recent formulation moved even closer to the maximum or they came to believe that squeezing in just below at the maximum at 6100 is not really a good selling point versus just making us guess.
Casterol is funny because they uniquely advertise the two maximums as their specs for their oil.
Castrol has had a long history of publishing specification limits as their PDS values.
All of this goes to show how sketchy it is to rely on PDS “typical values” as a basis for fine-tuning oil selection, especially within a grade.
All of this goes to show how sketchy it is to rely on PDS “typical values” as a basis for fine-tuning oil selection, especially within a grade.
I switched to AMSOIL Signature Series 0w20 on the last oil change for our 2016 Outback w/58,500 miles. Planning on going 7,500 miles or 12 months, whichever comes first before sending oil for analysis. I'm running Valvoline Restore and Protect 0W30 in our 2003 Camry w/144k and 0/W20 in 2016 Forester w/115k miles. I plan on running the Valvoline Restore and Protect for 4 full 3-4k cycles in those cars before considering any change there.
add Valvoline and Mobil to the list also.
- Joined
- Dec 10, 2025
- Messages
- 10
Send for analysis at 5k miles and then at 7.5k to get a trend. Also, consider sending in sample of the virgin oil that way you can see changes from unused and used oil, particularly the oxidation value. Something to consider.
