How often do you change the oil filter on a Subaru?

Oil filters on Subarus are replaced with every oil change. In practice, expect about 3,000 miles (4,800 km) for conventional oil and about 6,000 miles (9,600 km) for synthetic oil, though exact intervals depend on model year, engine type, and driving conditions and should be confirmed in the owner’s manual.

Understanding Subaru’s maintenance guidance

Subaru’s official maintenance recommendations vary by model year and whether you use conventional or synthetic oil. For many newer Subarus, the oil and filter change interval aligns with the type of oil used: shorter for conventional oil and longer for synthetic. Severe driving conditions can shorten these windows, so owners should consult the manual or a dealer for their exact figures.

Quick reference by oil type and typical conditions:

1. Conventional oil: Change engine oil and filter about every 3,000 miles (4,800 km) or every 3 months, whichever comes first.


2. Synthetic oil: Change engine oil and filter about every 6,000 miles (9,600 km) or every 6 months, whichever comes first. Some models or unusual conditions may allow up to 7,500 miles; always verify with the owner's manual or dealer.


3. Note: Always replace the oil filter with every oil change. For exact intervals, follow your model year’s maintenance schedule in the manual.

In practice, many Subarus that specify synthetic oil use a 6,000-mile/6-month interval, while conventional-oil applications usually fall around 3,000 miles/3 months. Always consult the owner’s manual or a Subaru service adviser for your exact engine and year, and be mindful of driving conditions that can shorten these intervals.

Factors that influence oil/filter change frequency

Several conditions can push you toward more frequent changes or allow longer gaps between them. Here are the primary considerations for Subaru owners.

• Severe driving conditions: frequent short trips, heavy idling, or city driving can degrade oil faster.


• Dusty or off-road environments: particulates can contaminate oil and filter more quickly.


• Extreme temperatures: very hot or very cold climates can stress engine oil and filtration.


• Engine wear and model specifics: higher-mileage engines or turbocharged setups may benefit from shorter intervals.


• Oil type and quality: switching to high-quality synthetic oil can extend intervals, whereas conventional oil typically requires more frequent changes.

Many Subarus include the Maintenance Minder system (where equipped) that helps indicate when an oil-and-filter service is due. Always rely on that system alongside the owner’s manual for your exact vehicle and usage pattern.

Maintenance tips for changing the oil and filter

When you plan an oil change, follow best practices to ensure the filter and oil are replaced correctly. These tips apply broadly across Subaru models, but always consult the service manual for specifics.

• Use the oil grade and viscosity recommended in your owner's manual (many modern Subarus use synthetic 0W-20 oil).


• Install the correct Subaru-approved oil filter designed for your engine; do not reuse the old filter.


• Replace the drain plug washer if specified and torque the drain plug to the manufacturer’s specification.


• Dispose of used oil and filters responsibly at an approved recycling facility.

Following these steps helps protect the engine from contaminants and maintains performance across Subaru models.

Summary

For most Subaru owners, the oil filter is changed with the oil at each service. The typical interval is about 3,000 miles for conventional oil and about 6,000 miles for synthetic oil, though your exact figure depends on model year, engine type, and driving conditions. Always check the owner's manual or consult a Subaru service adviser for the precise schedule, and consider driving conditions that may require more frequent changes. A proactive approach, guided by the Maintenance Minder (where equipped) and factory guidelines, helps keep your Subaru running smoothly.

Why are Subaru oil changes so frequent?

Over time, oil breaks down and becomes contaminated with dust, debris, and sludgy deposits. If you don't get your oil changed regularly, this dirty oil can cause increased friction and engine damage. Subaru recommends getting your oil changed every 6 months or 6,000 miles, whichever comes first.

How long does a Subaru oil filter last?

The oil filter on your Subaru Solterra will generally last over 3,000 miles or 3 months, however, many oil filters can genuinely survive average damage for up to 7,500 miles.

How often should synthetic oil be changed on a Subaru?

For most modern Subarus, the recommended synthetic oil change interval is every 6 months or 6,000 miles, whichever comes first, though this can vary by model and driving conditions. Some newer turbo models may have slightly longer intervals, while older models or those driven under harsh conditions may require more frequent changes. Always check your specific owner's manual for the exact recommendation for your vehicle. 
General guidelines

• Standard interval: Most Subaru vehicles are on a 6-month or 6,000-mile oil change schedule. 
• Time vs. mileage: If you don't drive much, it's still best to change the oil every six months, as oil breaks down over time regardless of mileage. 
• Turbo models: First oil changes for turbo models may be at slightly different mileages (e.g., 3,750 miles) and subsequent changes may need to be more frequent. 
• Harsh driving: If you frequently drive in harsh conditions like off-roading, extreme temperatures, or heavy towing, you should consider changing your oil more often. 

Key takeaways

• Consult your owner's manual: This is the most reliable source for your specific car's requirements. 
• Synthetic oil is designed for longer life: Synthetic oil allows for longer intervals than conventional oil, but Subaru still recommends a specific schedule for it. 
• Do not exceed the time limit: It's crucial to adhere to the 6-month time frame even if you haven't reached 6,000 miles. 

Do I need to change my oil filter every time I change my oil?

Yes, you should change your oil filter with every oil change to prevent contaminants from circulating in the new oil and damaging the engine. While some manufacturers may suggest changing the filter at longer intervals, it is standard practice and recommended by most to replace it every time to ensure proper lubrication and engine longevity. 
Why changing the oil filter is important

• Removes contaminants: The filter traps dirt, debris, and metal particles that can build up in the oil. 
• Protects your engine: By circulating clean oil, the filter prevents these contaminants from causing poor lubrication, performance issues, and premature engine wear. 
• Prevents future problems: If you don't change the filter, new oil will be recirculated through a dirty filter, rendering the oil change less effective. 
• Maintains warranty: Following the recommended maintenance schedule, which includes changing the oil filter with every oil change, helps to keep your vehicle's warranty valid. 

When you might be able to skip a filter change (and why it's risky)

• Some manufacturers recommend changing the filter every other oil change, especially if you're using high-quality synthetic oil and changing it more frequently than the standard interval, notes Firestone Complete Auto Care and AutoZone. 
• However, changing the filter is inexpensive and a crucial part of engine maintenance, making it a small price to pay for avoiding potential engine damage, says this Reddit thread. 
• Note: There are cases where a filter can clog. If your Check Engine light comes on, a clogged filter could be the cause, and replacing it might solve the issue, as mentioned by Richmond Ford West.