Performance Stats

AMSOIL Independent Performance Test Data

We don’t just say synthetic is better — here’s the third-party, independently verified testing behind it. This is the same data AMSOIL publishes and stands behind, pulled straight from their published performance testing. Application matters, so always check your OEM spec first — then use this to see why we default to AMSOIL Signature Series within it.

Motor Oil

  • Up to 62% better deposit prevention — TEOST 33C test
  • 67% less sludge — Mod. Sequence VH test
  • 37% more cleaning power — vs. OE Synthetic
  • Up to 16% better cold-temp viscosity — vs. Mobil 1, ASTM D5293
  • 75% more wear/horsepower-loss protection — Signature Series, Sequence IVA
  • 100% LSPI protection — Signature Series, GM dexos1 Gen 2 test
  • 72% better turbo protection — Signature Series, vs. dexos1 Gen 2 requirement
  • 90% better sludge protection — Signature Series, ASTM D6593
  • 40% cleaner pistons at 2x test length — Signature Series, Sequence IIIH
  • 28% more acid-neutralizing power — vs. Mobil 1, ASTM D2896

Diesel Oil

  • 4X wear protection — Heavy-Duty Synthetic, vs. Detroit Diesel standard
  • Up to 66% less oil consumption — Heavy-Duty Synthetic
  • 6X wear protection — Signature Series Max-Duty
  • Up to 76% less oil consumption — Signature Series Max-Duty, vs. API CK-4
  • 60% better turbo cleanliness — CAT C13 test
  • Up to 2X rust protection — NMMA FC-W test
  • 4X better cold-temp performance — 0W-40, vs. 15W-40

Powersports & Specialty

  • 6X better resistance to viscosity breakdown — V-Twin motorcycle oil, vs. Harley-Davidson SYN3
  • 96% carbon-free — SABER Professional 2-stroke, spark-arrestor testing
  • Proven across 1,617 miles — INTERCEPTOR 2-stroke, rental snowmobile test

Fuel Additives

  • Up to 14% restored horsepower — P.i., 3rd-party test on a 2016 Silverado 1500
  • 8X longer fuel stability — Gasoline Stabilizer, vs. Sea Foam

Filters

  • 99% efficiency at 20 microns — ISO 4548-12 test

Testing referenced above is independent, third-party laboratory testing conducted per the industry-standard test methods noted (ASTM, NMMA, ISO, and OEM-specified sequence tests). Full methodology and source detail available at amsoil.com.

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