Capacities vary by engine, not just by year. Overfilling a Subaru boxer engine is a real problem, so the dipstick is always the final word. Buy a 5-quart jug for a 4-cylinder and you will have a little left over. The 3.6L needs nearly seven quarts, so plan for two jugs or a 7-quart container.
🛢️ Oil capacity by engine
Here is the breakdown by engine, including the viscosity and approximate capacity with a filter change. These are typical figures; your owner's manual and oil cap are the authoritative source for your exact build.
| Engine / Years | Capacity (w/ filter) | Viscosity |
|---|---|---|
| 2.5L H4 (2010-2019) | 4.4-4.8 qt | 0W-20 synthetic |
| 2.5L H4 (2020-present) | ~4.8 qt | 0W-20 synthetic |
| 2.4L Turbo XT (2020-present) | ~5.1 qt | 0W-20 synthetic |
| 3.6L H6 (2010-2019) | ~6.9 qt | 5W-30 synthetic |
| 3.0L H6 (2005-2009) | ~6.3 qt | 5W-30 |
Note the outlier: the 3.6L 6-cylinder is the only common Outback engine that calls for 5W-30 instead of 0W-20. If you have a 6-cylinder Outback, do not grab 0W-20 by habit.
🔧 Which filter does it use?
Most 4-cylinder Outbacks built since 2011 use the smaller Subaru cartridge-style oil filter (part 15208AA15A, sometimes sold as AA160). It is the well-known compact filter and is easy to over-tighten, so hand-snug plus a quarter turn is plenty.
- 2.5L and 2.4L 4-cylinder: Subaru 15208AA15A (Tokyo Roki). Compatible options from Fram, Purolator, and K&N exist.
- 3.6L H6: larger spin-on filter (Subaru 15208AA12A). Different size, so confirm before buying.
- Always replace the crush washer on the drain bolt to avoid a slow leak.
If your dashboard is showing an oil pressure or maintenance light after a change, double-check the filter seal and oil level before driving. A loose filter or low fill can mimic a sensor fault. Our guide on the oil pressure light staying on walks through the quick checks.
📅 How often to change it
Subaru recommends an oil change every 6,000 miles or 6 months on full synthetic for most recent Outbacks. Older 3.6L and some early 2.5L models used a 7,500-mile interval, but synthetic at 6,000 is a safe, conservative target.
Switch to the severe-service interval of roughly 3,000 to 5,000 miles if you do mostly short trips under 5 miles, tow, idle a lot, or drive in heavy dust or extreme cold. Short-trip driving never fully burns off moisture and fuel, which thins the oil faster.
Watch for oil consumption
Some 2013-2014 2.5L Outback engines were known for higher-than-normal oil consumption. If you are topping off between changes, check your level every other fill-up and keep a log. Burning oil can point to ring or PCV issues. See our breakdown of why a car burns oil if your level keeps dropping.
💵 What an oil change costs
Because capacity drives cost, the 6-cylinder is pricier to service than the 4-cylinder simply due to the extra two-plus quarts. Here is a realistic range.
| Option | 4-Cylinder | 3.6L 6-Cylinder |
|---|---|---|
| Dealer / shop (synthetic) | $75-$120 | $90-$150 |
| Quick-lube chain | $65-$95 | $85-$130 |
| DIY (parts only) | $35-$50 | $45-$65 |
Quoted way more than this? Run the number through our repair quote checker before you pay. A basic synthetic oil change should never cost $200 unless something else is bundled in.
⚠️ Common mistakes to avoid
- Overfilling. Boxer engines are sensitive to overfill. Add about 4.2 quarts to a 4-cylinder first, run it, then top to the dipstick. Too much oil can foam and cause a rough idle.
- Wrong viscosity. Using 5W-30 in a 0W-20 4-cylinder hurts cold-start protection and fuel economy. Check the oil cap, not a forum.
- Reusing the crush washer. A flattened washer leaks. Replace it every change.
- Over-tightening the cartridge filter. The small 4-cylinder filter cracks or seizes if cranked down. Hand-tight plus a quarter turn.
- Ignoring the consumption history. If your model year is known to burn oil, do not rely on the maintenance light. Physically check the dipstick monthly.
✅ Quick step-by-step
- Confirm your engine and the matching oil type from the table above and your oil cap.
- Buy the right amount: a 5-quart jug covers any 4-cylinder; grab 7 quarts for the 3.6L.
- Warm the engine briefly, then drain. Replace the crush washer.
- Swap the filter. Lightly oil the new gasket. Hand-snug only.
- Add about 90% of the capacity, run for 30 seconds, wait, then top to the full mark.
- Reset the maintenance reminder and check for leaks after a short drive.
❓ Frequently asked questions
📋 TL;DR
How much oil does a Subaru Outback take? 4.4 to 4.8 quarts of 0W-20 for the 4-cylinder, about 5.1 quarts for the 2.4L turbo XT, and about 6.9 quarts of 5W-30 for the 3.6L 6-cylinder. Use the cartridge filter on 4-cylinders, change every 6,000 miles on synthetic, replace the crush washer, and always finish by the dipstick to avoid overfilling.