AMSOIL vs Every Big Oil Brand
AMSOIL comparison hub: 23 head to head comparisons in one place. Where independent lab data or a real field study exists, you will see the actual numbers, not just a claim. Where a comparison still needs that same rigor applied, it is marked honestly rather than dressed up. Not sure which comparison matters for your vehicle? Call Alan directly at 225-441-6397.
Alan Williams · AMSOIL Direct Jobber #1243776 · Tomball, TX
Flagship Comparison
AMSOIL vs. Mobil 1
Full independent lab testing across 6 specifications, an interactive cost calculator, and vehicle-specific breakdowns for trucks, motorcycles, cold climates, diesel, and track use.
Major Synthetic Motor Oil Brands (AMSOIL comparisons)
The most searched brand to brand comparisons for passenger cars and light trucks.
AMSOIL vs. Pennzoil
How AMSOIL’s full synthetic chemistry compares to one of the most recognized names on the parts-store shelf.
AMSOIL vs. Castrol
A look at how Castrol’s synthetic lineup stacks up against AMSOIL Signature Series.
AMSOIL vs. Valvoline
Lab data comparison and cost analysis against Valvoline’s full synthetic line, including extended drain claims.
AMSOIL vs. Havoline
Which oil offers stronger engine protection between AMSOIL and Chevron’s Havoline line.
AMSOIL vs. Motorcraft
How AMSOIL compares to Ford’s factory branded Motorcraft oil.
AMSOIL vs. Redline
Two ester and PAO focused premium synthetic brands compared head to head.
AMSOIL vs. Motul
How AMSOIL’s synthetic lineup compares to Motul, a brand well known in European and performance circles.
AMSOIL vs. Liqui Moly
Comparing AMSOIL against the German engineered Liqui Moly synthetic line.
AMSOIL vs. Royal Purple
Independent TEOST 33C data shows AMSOIL producing 3.6x fewer turbo deposits, plus a look at Royal Purple’s 2009 advertising claim history.
AMSOIL vs. Schaeffer
How AMSOIL compares to Schaeffer’s lineup of synthetic and synthetic blend lubricants.
AMSOIL vs. Amazon Basics
A look at whether a budget marketplace brand synthetic oil holds up against AMSOIL’s chemistry.
Diesel & Heavy Duty
For truck and fleet owners comparing diesel specific formulations.
AMSOIL vs. Shell Rotella T6
Also covered in depth inside the Diesel Truck Oil Guide. How AMSOIL’s diesel line compares to the most widely used synthetic diesel oil in North America.
AMSOIL vs. Delvac 1
Includes a real independent field study, Nordic Waste in Duluth MN, testing AMSOIL directly against Mobil Delvac 1 ESP in a working refuse hauler.
Motorcycle & Powersports
Wet clutch safe comparisons for riders weighing AMSOIL against OEM and other powersports oils.
AMSOIL vs. Harley-Davidson SYN3
Also covered in depth inside the Harley-Davidson Oil Guide, including full JASO and TEOST data against Harley’s own factory SYN3.
AMSOIL vs. Polaris Oil
Comparing AMSOIL’s powersports line to Polaris’s factory branded oil for ATVs and side by sides.
AMSOIL vs. Yamalube
How AMSOIL compares to Yamaha’s own factory branded Yamalube oil.
AMSOIL vs. Super DiaQueen
A hands on comparison against Super DiaQueen for powersports and small engine applications.
Additives & Specialty Products
Comparisons against fuel system and specialty treatment brands, not straight motor oil.
AMSOIL vs. Sea Foam
How AMSOIL’s approach to engine cleanliness compares to Sea Foam’s fuel system treatment products.
AMSOIL vs. Lucas
Comparing AMSOIL’s synthetic oil line to Lucas Oil’s products and additive philosophy.
Choosing Between AMSOIL Products
Not a competitor comparison, help deciding between two AMSOIL product lines.
AMSOIL High Mileage vs. Signature Series
Which AMSOIL product line actually fits your engine’s mileage and condition.
Not Sure Which Comparison Applies to You?
No obligation, tell me what you’re running and I’ll give you a straight answer.
AMSOIL and all competitor brand names referenced are registered trademarks of their respective owners. Lube Oil Sales is an Authorized AMSOIL Independent Dealer (Dealer #1243776). This page contains affiliate links. Last updated: July 2026.