ProEdge Lubricants
AMSOIL Signature Series Motor Oil
Signature Series is AMSOIL's premium gasoline motor oil family for passenger cars and light trucks. Use the AMSOIL guide to confirm the right viscosity, capacity and filter, then open the Signature Series product that matches your vehicle.
Start here
Quick answer
For most shoppers, Find Your Fit should be the first step. It uses your exact vehicle details to point you to the right viscosity, capacity and filter. Use the product cards when you already know the Signature Series oil you need.
Find the right viscosity
For most shoppers, this is where to start. The lookup guide matches your exact vehicle to the right viscosity, oil capacity and filter.
- Enter your exact year, make, model and engine so the guide can show the recommended oil and filter.
- Use the guide result to choose the right product directly from the recommendation.
Shop Signature Series
Open the Signature Series product list when the family is clear.
Shop Signature Series
Build the oil change
Confirm the correct AMSOIL filter for the same vehicle before ordering the oil-change setup.
- Oil filters complete the oil change by matching the vehicle's filter part number to the selected oil family.
- Use the vehicle lookup result or product details to confirm the exact filter before ordering.
Monitor oil condition
Use oil analysis when condition monitoring or interval decisions need lab-backed context.
- Oil analysis can support condition monitoring and service-interval decisions.
- Use it when equipment value or operating conditions justify lab feedback.
Signature Series
Choose your Signature Series viscosity
For most shoppers, start with Find Your Fit. It confirms the right Signature Series viscosity, oil capacity and filter before you choose a product.
Product benefits
What AMSOIL says about Signature Series
These are some of the main Signature Series benefits shown on the product pages. Use this as a quick overview, then use the guide to check the right oil weight, fill amount and filter for your vehicle.
- Engine protection 75% more engine protection against horsepower loss and wear. It also helps protect key parts like pistons and cams.
- Startup protection Better cold cranking viscosity helps improve wear protection for engine parts at startup.
- Cleaning power 50% more cleaning power than AMSOIL OE Motor Oil. It also helps keep oil passages cleaner and control heat.
- Sludge protection Signature Series provides 90% better protection against sludge and helps support oil flow.
- Piston cleanliness It delivered 40% cleaner pistons than required by the standard, even after the test length was doubled.
- Turbo and LSPI protection 72% better turbocharger protection than required by the GM dexos1 Gen 2 specification. AMSOIL synthetic motor oils, including Signature Series, achieved 100% protection against LSPI.
- Viscosity control Signature Series showed only a 0.1% viscosity increase and delivered twice the viscosity control required by the standard when the test length was doubled.
- Service interval Guaranteed protection for up to 25,000 miles or one year. Use the guide and current service details to confirm the right oil, filter and interval for your vehicle.
Complete the oil change
Filters, oil analysis and buying options
Once the Signature Series viscosity is chosen, use the guide or product details to confirm the matching filter and any supporting service items. Open the product detail page for current application guidance, then verify the exact fit through the lookup guide when the vehicle or equipment controls viscosity, capacity or part numbers.
Oil filters
Confirm the exact filter through the guide or product detail page before ordering.
- Oil filters complete the oil change by matching the vehicle's filter part number to the selected oil family.
- Use the vehicle lookup result or product details to confirm the exact filter before ordering.
Oil analysis
Use oil analysis when condition monitoring or interval decisions need supporting data.
- Oil analysis can support condition monitoring and service-interval decisions.
- Use it when equipment value or operating conditions justify lab feedback.
Preferred Customer option
Use this option when you expect to buy AMSOIL products more than once.
- Personal repeat-buyer account option after the oil, filter and maintenance products are chosen.
- Use the Business Account option instead for shop, fleet, farm, contractor or other business purchasing.
Business Account option
Use this option for shops, fleets, farms, contractors and other business purchasing needs.
- Business Account option for shops, fleets, farms, contractors and organizations buying for work vehicles or equipment.
- Use when AMSOIL products are being purchased for business vehicles, equipment or operations.
Other Signature Series products
Diesel and transmission products
Looking for Max-Duty diesel oil or Signature Series transmission fluid? Those products have dedicated ProEdge Lubricants pages with the right service context.
Need Signature Series Max-Duty diesel oil?
Use the diesel page for diesel oil, fuel additives, filters, bypass filtration and diesel service context.
- Use this diesel oil category to compare current AMSOIL diesel oil families and viscosities.
- Confirm the exact application before choosing viscosity, package size or service guidance.
Need Signature Series transmission fluid?
Use the drivetrain page when the job is ATF, CVT, DCT, manual transmission fluid, gear oil or another drivetrain fluid.
- Transmission designs require the correct ATF, CVT, DCT or manual fluid family.
- Use product details and lookup results before choosing a fluid.
Vehicle and product match
Confirm the exact match before ordering
Use the AMSOIL lookup guide or the product detail page when year, make, model, engine, transmission, capacity, operating conditions or product specifications matter. ProEdge Lubricants is operated by an Authorized AMSOIL Dealer and points shoppers to current AMSOIL product information.
FAQ
Common questions
Should I pick products from this page or use the lookup guide?
Use Find Your Fit when viscosity, capacity, service interval or product selection depends on your exact vehicle or equipment. Use the product cards when you already know the family you need.
Can ProEdge Lubricants choose exact products for every model?
This page keeps selection conservative. Use the current AMSOIL lookup guide and product detail pages for final vehicle match and application details.
Is this page only for gasoline motor oil?
Yes. This page is focused on AMSOIL Signature Series gasoline motor oil. Diesel oil shoppers should use the diesel page, and transmission-fluid shoppers should use the drivetrain fluids page.
Should I choose by viscosity first?
No. Start with Find Your Fit or the Signature Series product list when the vehicle, viscosity, capacity, filter or service plan controls the correct product.
Where should diesel shoppers go?
Use the ProEdge Lubricants diesel page for diesel oil, fuel additives, filters and diesel service context.
Where should transmission-fluid shoppers go?
Use the ProEdge Lubricants drivetrain-fluids page for ATF, CVT, DCT, manual transmission fluid, gear oil and related drivetrain products.
Can ProEdge Lubricants publish prices here?
No. Current pricing belongs on amsoil.com, so this page keeps the public copy focused on product selection and application guidance.
Next step
Ready to choose?
Most shoppers should start with Find Your Fit when the vehicle determines viscosity, capacity or filter choice. Open Signature Series details when you already know the product, or use the buying options after the product choice is clear.
Find the right Signature Series oil
For most shoppers, this is the right place to start. The AMSOIL guide matches your vehicle to the right viscosity, oil capacity, filter and service notes.
- Use exact vehicle or equipment details before choosing viscosity, capacity or filters.
- Return to product details after the guide narrows the correct family.
Shop Signature Series
Open the Signature Series product list when the family is already clear.
Shop Signature SeriesRepeat buyer option
Preferred Customer is the personal repeat-buyer option after the Signature Series product, viscosity and filter are known.
- Choose this option after you know the product family, viscosity and filter you plan to order.
- Use Business Account instead for shop, fleet, farm, contractor or other business purchasing.
Business buying option
Business Account is for shops, fleets, contractors, farms and organizations buying for work vehicles or equipment.
- Use this buying option for business vehicles, equipment, shop inventory, fleet service, farm operations or contractor use.
- For personal vehicle purchases, choose the product first and then use Preferred Customer if you buy repeatedly.