Automotive Lubrication Guides
Practical automotive lubrication guides for choosing the right oil, fluid, specification and maintenance path without guessing from the label on the bottle.
Quick Answer | Start With the Application
Start with the exact vehicle, engine or equipment application. Confirm the required specification and approved viscosity before choosing a lubricant. If you already know the application, use the lookup tools. If you need to understand the specification, viscosity or product choice first, use the automotive lubrication guides and reference sections below.
Choose the Right Path
Vyscocity separates application lookup, technical reference and product-selection content so you can go directly to the information you need.
Motor Oil Selection
The best synthetic motor oil depends on the specification your engine requires, the viscosity the manufacturer lists and how long you plan to run each oil change. Compare the leading synthetics on approvals, drain intervals and cost per mile.
First guide: Best Synthetic Motor Oil | Top Brands Compared
Diesel & Heavy-Duty
Diesel oil selection depends on the engine, emissions system, required specification, viscosity and service conditions. This section will cover diesel pickups, heavy-duty applications and lubricant selection without treating every diesel engine as the same application.
First guide: AMSOIL Diesel Oil | Which Formula Is Right for Your Truck?
Oil Specifications & Standards
Viscosity tells you how an oil flows. The specification tells you how the lubricant must perform. Use the Vyscocity specification library for API, ACEA, OEM and other lubricant requirements.
Oil Capacity & Application Lookup
Need the likely oil capacity, viscosity, required specification, filter information or refill notes for a specific vehicle or engine? Start with the application lookup rather than guessing from a general article.
AMSOIL Product Lookup
If you already know the vehicle or equipment and want the correct AMSOIL product path, use the lookup guide to reach application tools, filters, product references and ordering resources.
Not Sure Which Oil Your Vehicle Takes?
Enter the year, make, model and engine to see the AMSOIL products listed for that application, or shop the full AMSOIL motor oil line.
How to Use Vyscocity's Automotive Lubrication Guides
Use a guide when you need help making a decision or understanding why one lubricant fits an application better than another. Use a specification page when you need the technical requirement itself. Use a lookup tool when you already know the vehicle or equipment and need application-specific information.
The owner's manual, current service information and exact application remain the final check for vehicle-specific capacities, specifications and service requirements.
Specification First | Viscosity Second
Two lubricants can carry the same SAE viscosity grade and still be intended for different engines or operating requirements. A viscosity such as 5W-30, 5W-40 or 15W-40 does not by itself prove that the oil meets the specification required for the application.
Confirm the required specification, then choose an approved viscosity for the exact engine, model year, market and operating conditions.
Buy From the Mechanic | Not the Salesman
Vyscocity is built around getting the application right before recommending the product. The goal is not to put the most expensive bottle into every engine. It is to identify what the application requires, verify the specification and viscosity, then choose a lubricant that fits how the vehicle or equipment is actually used.
Technical claims, product claims and application recommendations should be traceable to the appropriate source rather than repeated because they appeared on another website.
Know the Vehicle? | Find the Oil
If you have the year, make, model and engine, start with the application tools. If you are comparing AMSOIL products or trying to understand the requirement first, continue through the Vyscocity guides and technical references.