Jul 28, 2024 · Can anyone tell me what makes amsoil signature series so great? Anyone able to explain why? Is it marketing ? I’m genuinely curious if this really is so much better then say Mobil 1, Castrol, …

Nov 26, 2006 · You want to use the Mobil 1 0W-20, as it is API-certified, and that will most likely be required for your warranty. Amsoil has 2 0W-20's that are API-certified, the 'XL' and 'OE' 0W-20. IF …

Jan 3, 2021 · Similar threads Amsoil Signature Series 0w-20 rstcso Jun 13, 2025 Virgin Oil Analysis - PCMO/HDEO 2 3 Replies 45 Views 4K Jul 31, 2025

May 3, 2025 · Similar threads Amsoil Signature Series 0w-20 rstcso Jun 13, 2025 Virgin Oil Analysis - PCMO/HDEO 2 3 Replies 45 Views 4K Jul 31, 2025

May 7, 2025 · Per Amsoil Magazine: "....Amsoil Signature Series is undergoing a revolutionary reformulation that promises to usher in the next generation of motor-oil technology." For the XL, HM …

2024 GMC Sierra with 3.0 Duramax diesel. At 11820 miles on truck took a oil sample with 4500 miles on the oil using amsoil 0w-20 diesel oil. They flagged a few things so we changed the oil and took …

Jun 13, 2006 · "AMSOIL European Car Formula 0W-20 Synthetic Motor Oil is engineered for use in gasoline or diesel vehicles that require any of the following specifications:" API SN-PLUS ACEA C5 …

May 7, 2025 · Replies 34 Views 1K Nov 11, 2025 Japanese Amsoil Signature Series 0w-20 4k, Honda Pilot 3.5L, 4.5k rstcso Jun 27, 2025 Used Oil Analysis - Gasoline Replies 7 Views 955 Jun 28, 2025

Apr 2, 2023 · Welcome to bitog. Thick vs thin and daily Amsoil threads. I'd use any 5w30 that meets dexos 1 gen 3, and leave thinner oils on the shelf. Can't decide on a brand? Use the one everybody …

Aug 30, 2007 · We just purchased a new 2023 Suburban with the 3.0 Duramax, our first diesel. GM calls for 0W-20 Dexos D certified oil, which sadly, is in short supply. I'd like to find an alternative oil that I …