Engine Oil
Protects the engine, turbocharger where equipped, timing components, bearings and other lubricated parts.
Subaru engine oil information
Red Seal 310T Technician · AMSOIL Dealer Since 2006
Subaru Lubrication and Maintenance
Subaru Engine Oil, CVT Fluid & Maintenance
Find the correct engine oil, CVT fluid, differential oil and maintenance information for Subaru vehicles. Start with the exact year, model, engine and transmission—because one recommendation does not fit every Outback, Forester, Crosstrek, WRX or Ascent.
Start With the Application
Subaru Fluid Selection Is Vehicle-Specific
Subaru owners pay close attention to oil viscosity, CVT fluid and differential service—and for good reason. Subaru uses different engines, transmissions and fluid requirements across its model years.
A normally aspirated FB-series engine does not automatically use the same engine oil recommendation as a turbocharged FA-series engine. A manual-transmission WRX does not use the same transmission lubricant as a Lineartronic CVT model. The BRZ also differs from most other Subaru vehicles in several drivetrain and maintenance details.
The safe approach is simple: identify the exact vehicle first, then match the lubricant to the specification and viscosity listed for that application. Do not select a fluid from bottle colour, internet habit or a recommendation written for a different model year.
Technician’s Rule
Verify the year, model, engine and transmission before buying fluid.
“It fits a Subaru” is not enough information for an engine oil, transmission fluid or differential lubricant recommendation.
Subaru Fluid Categories
What Fluids Does a Subaru Need?
Most Subaru maintenance questions fall into four main lubricant categories. Each system does a different job and may require a completely different product.
CVT Fluid
Provides the frictional, hydraulic and wear-control properties required by an applicable continuously variable transmission.
Subaru CVT fluid informationDifferential Oil
Lubricates the front and rear final-drive gears used by Subaru’s all-wheel-drive system.
Subaru differential informationManual Gear Oil
Used in applicable manual transmissions and transaxles. The required lubricant must suit the gears and synchronizers in that unit.
Manual transmission information
Subaru Engine Oil
Use the Viscosity Listed for Your Exact Engine
Subaru has used several engine families, including EJ, FB and FA engines. Required viscosity, oil capacity and service information can change with the engine, model year, market and operating conditions.
Many later Subaru applications specify a low-viscosity synthetic oil, while some older, turbocharged or performance applications have different requirements. The fact that two vehicles both have a horizontally opposed engine does not make their oil recommendations identical.
Subaru Owners Should Check
- The viscosity printed in the owner’s manual or oil-fill information.
- The API and ILSAC performance requirements where applicable.
- Whether the engine is naturally aspirated or turbocharged.
- The correct oil capacity with filter replacement.
- The oil level after filling and again after the engine has run.
Do not diagnose oil consumption by changing viscosity alone.
Confirm the oil level, leaks, service history and engine condition. Using a heavier oil without checking the manufacturer’s permitted viscosity range can create another problem instead of fixing the first.
Lineartronic CVT Service
Subaru CVT Fluid Is Not a Universal Fluid Decision
Subaru has used multiple CVT designs and fluid requirements. Before using an aftermarket CVT fluid, confirm that the product manufacturer specifically recommends it for the exact vehicle application.
Confirm Compatibility
Do not assume that every fluid labelled “CVT” meets every Subaru requirement. Check the exact year, model and transmission application.
Use the Correct Procedure
Many CVTs require a controlled fluid-temperature range and a specific level-check procedure. Overfilling or underfilling can affect operation.
Do Not Guess the Level
Measure what was drained when appropriate, follow service information and confirm the final fluid level using the specified procedure.
Canadian maintenance schedules matter.
Subaru Canada’s current maintenance guide recommends replacement of CVT fluid on applicable non-BRZ models at 110,000 km or 66 months. Older model-year schedules and other markets may list different inspection or replacement intervals. Use the schedule issued for the exact vehicle.
Subaru AWD Drivetrain
Front and Rear Differential Oil
Subaru’s all-wheel-drive system depends on lubricated final-drive components. Differential oil protects gears and bearings under the sliding and rolling loads created as torque is delivered to the wheels.
The front differential arrangement depends on the transmission. In some applications the front differential is housed with the transmission assembly but uses a separate lubricant compartment. That makes correct drain-plug and fill-plug identification especially important.
Common Service Mistakes
- Draining the wrong compartment.
- Removing a drain plug before confirming the fill plug can be opened.
- Using the CVT fill opening for differential oil or the reverse.
- Installing the wrong gear-oil viscosity.
- Assuming front and rear capacities are identical.
- Failing to replace sealing washers where required.
Manual Subaru Models
Manual Transmission and Transaxle Lubricants
A manual transmission requires more than an oil with the correct number on the label. The lubricant must also suit the gears, bearings and synchronizer materials used in that transmission.
Shift Quality Matters
A lubricant can provide strong gear protection and still be a poor match for synchronizer engagement. Use a product specifically recommended for the transmission rather than a random axle lubricant.
BRZ Is Its Own Application
The Subaru BRZ uses a different drivetrain layout from Subaru’s mainstream all-wheel-drive vehicles. Do not transfer WRX, Crosstrek or Outback fluid advice directly to a BRZ.
Subaru Model Information
Subaru Models Covered by This Section
Model-specific DPS pages will be added one at a time. Each page will direct owners to the correct engine, transmission and drivetrain information instead of repeating one broad Subaru recommendation.
Outback
Engine oil, CVT fluid, differentials, capacities and service intervals.
Forester
Engine oil, Lineartronic CVT fluid, AWD drivetrain and maintenance.
Crosstrek
Oil viscosity, filters, CVT service and differential lubricant.
WRX
Turbo engine oil, manual transmission, CVT and differential information.
Ascent
Turbo engine oil, high-torque CVT application and AWD maintenance.
Impreza
Engine oil, CVT or manual transmission and drivetrain service.
Legacy
Engine oil, CVT fluid, differential oil and scheduled maintenance.
BRZ
Engine oil, rear-wheel-drive transmission and rear differential service.
Preventive Maintenance
Maintenance Is More Than an Engine Oil Change
Engine oil gets most of the attention, but the CVT, manual transmission and differentials also depend on clean, correct lubricant.
| Service Area | What Must Be Confirmed | Why It Matters |
|---|---|---|
| Engine oil | Viscosity, specification, capacity and interval. | Protects bearings, timing components, pistons and turbocharger where equipped. |
| CVT fluid | Exact transmission application, fluid compatibility and level procedure. | Supports hydraulic control, friction performance, cooling and wear protection. |
| Front differential | Correct compartment, gear-oil requirement, capacity and plug location. | Protects the front final-drive gears and bearings. |
| Rear differential | Required viscosity, capacity, drain/fill plugs and service interval. | Protects the rear final-drive gears and bearings. |
| Manual transmission | Gear protection and synchronizer-compatible recommendation. | Affects wear protection, cold shifting and synchronizer operation. |
| Oil level checks | Correct measuring procedure, vehicle position and fluid temperature. | Prevents operation with too much or too little lubricant. |
Modified Subaru vehicles need additional judgment.
Increased boost, tuning, track use, larger tires, towing and other modifications can increase lubricant temperature and load. A modified vehicle should not automatically follow advice written for a stock daily driver without considering how the vehicle is actually used.
Buy From the Mechanic. Not the Salesman.
Practical Lubrication Information
Vyscocity is an authorized AMSOIL dealership serving the USA and Canada. Product recommendations are approached from a technician’s point of view: identify the application, confirm the specification and use the correct service procedure.
The goal is not to put the same expensive product into every hole. The goal is to use the right lubricant in the right system and prevent avoidable failures.
DPS Subaru Roadmap
Building the Subaru Section One Page at a Time
This hub is the starting point. Detailed pages will be added as each Subaru topic is researched and built.
Fluid Topics
- LiveSubaru hub
- NextSubaru CVT fluid
- FutureSubaru engine oil
- FutureSubaru differential fluid
- FutureSubaru manual transmission fluid
- FutureSubaru oil filters
Model Pages
- FutureSubaru Outback
- FutureSubaru Forester
- FutureSubaru Crosstrek
- FutureSubaru WRX
- FutureSubaru Ascent
- FutureSubaru Impreza, Legacy and BRZ
Frequently Asked Questions
Subaru Oil and CVT Fluid Questions
What engine oil should I use in my Subaru?
Use the viscosity and performance specification listed for the exact model year and engine. Subaru oil requirements vary between engines, including naturally aspirated and turbocharged applications. Confirm the application before selecting oil.
Can I use AMSOIL in a Subaru?
AMSOIL offers engine oils, CVT fluids and gear lubricants recommended for many Subaru applications. Use the AMSOIL vehicle lookup to confirm the exact year, model, engine and transmission before ordering.
Does Subaru CVT fluid need to be changed?
Subaru Canada’s current maintenance guide recommends replacing CVT fluid on applicable non-BRZ vehicles at 110,000 km or 66 months. Requirements can differ by model year, vehicle and market, so follow the schedule issued for the exact vehicle.
Can I use any universal CVT fluid in a Subaru?
No fluid should be used merely because the bottle says “universal CVT.” The fluid manufacturer must recommend the product for the specific Subaru application. Confirm compatibility before servicing the transmission.
Do Subaru vehicles have front and rear differential oil?
Most Subaru all-wheel-drive vehicles have front and rear final-drive components that require the correct gear lubricant. The arrangement, lubricant specification and capacity vary by transmission and model.
Is the Subaru BRZ the same as other Subaru models?
No. The BRZ uses a rear-wheel-drive layout and has different transmission, differential and maintenance requirements from Subaru’s mainstream all-wheel-drive models.
How do I find the oil capacity for my Subaru?
Check the owner’s manual or a reliable application guide using the exact year, model and engine. After filling, verify the level using the specified procedure rather than relying only on the listed capacity.
Vehicle-Specific Product Lookup
Find AMSOIL Products for Your Subaru
Select the exact year, model and engine to see AMSOIL recommendations, capacities and available filters. Confirm the transmission application before purchasing CVT fluid or gear lubricant.
Maintenance information varies by model year, vehicle configuration and market. Always verify the owner’s manual and current service information for the exact vehicle.
Subaru and its model names are trademarks of their respective owner. Vyscocity is an independent authorized AMSOIL dealership and is not affiliated with Subaru.