Apr 13, 2012 · Amsoil, Shaeffers and T6 are all very capable fluids. But, depending upon individual application of fluid and equipment, there may or may not be a clear "winner" above the others. The …

Nov 8, 2017 · Just had some analysis come back for my 2021 Ford F350 for AMSOIL Signature Series that I recently switched to and the motorcraft that was in it before the change. Both done right around …

Jan 21, 2024 · Amsoil OE is a GrpIII base stock oil while Mobil 1 0w40 is a GrpIV I believe. Both oils should get the Job done for your application That’s the thing, Mobil 1 seems to change their formulas …

Jul 19, 2004 · Amsoil doesn't encourage extending OCI without UOAs, or in severe service conditions. They also recommend regular filter intervals and there are qualifications on 100K+ cars. I don't do …

Mar 13, 2024 · Nov 21, 2025 OilStained J New Amsoil EA15K13 different than Fram Endurance from 2023 Jack_Kieran Apr 30, 2024 Engine Oil Filters Replies 7 Views 4K Jul 11, 2024

Nov 26, 2006 · Amsoil has 2 0W-20's that are API-certified, the 'XL' and 'OE' 0W-20. IF you want to go with Amsoil, maybe choose one of those. I'm not an Amsoil user, but Amsoil fans seem to react …

Nov 4, 2025 · The remaining two Amsoil filters I had on the shelf are in the garage's trash can. The last OCI, I continued using Amsoil SS, but a different filter brand. I chose Pentius, but I'm pretty sure …

Aug 20, 2024 · Amsoil, from the start, has pushed the ‘long drain’ mantra, and kept it very consistent - 25k miles or 1 year. Other oils have offered long-drain guarantees, but they have come and gone. A …

Feb 11, 2007 · Amsoil EAO filters tout 99% filtration @20microns, but the test done by Ascent Filtration Labs shows Fram XG 99% @15microns. For the price, I would hope Amsoil is a better quality filter, …

May 3, 2025 · Similar threads Amsoil Signature Series 0w-20 rstsco Jun 13, 2025 Virgin Oil Analysis - PCMO/HDEO 2 3 Replies 51 Views 5K Feb 28, 2026