Choosing the right engine oil is one of the most critical maintenance decisions for your Subaru XV Crosstrek. The correct 0W-20 synthetic oil ensures your vehicle’s Boxer engine runs smoothly, efficiently, and is protected for the long haul. With so many options on the market, from the factory-fill choice to advanced aftermarket formulas, finding the best fit for your driving needs can be a challenge.
This 2025 review guide is designed to simplify your search. We have compiled a list of top-tier 0W-20 motor oils that meet or exceed the requirements for your Subaru XV Crosstrek. Whether your priority is maximum fuel economy, enhanced protection for towing, or advanced engine cleaning technology, there is a product here to help you maintain your vehicle’s performance and reliability.
Our Top Picks for Subaru XV Crosstrek 0W-20 Oil
- Subaru Synthetic Motor Oil SAE 0W-20 5 Quart
- Mobil 1 Advanced Fuel Economy Full Synthetic 0W-20
- Mobil 1 Truck & SUV Full Synthetic Motor Oil 0W-20
- Mobil Full Synthetic Motor Oil 0W-20, 5 Quart Case
- Valvoline Restore & Protect Full Synthetic 0W-20
- Pennzoil Ultra Platinum Full Synthetic 0W-20 Motor Oil
- Mobil 1 Advanced Full Synthetic Motor Oil 0W-20
- Valvoline Advanced Full Synthetic SAE 0W-20 Motor Oil
Subaru Synthetic Motor Oil SAE 0W-20 5 Quart
For Subaru XV Crosstrek owners who prefer to stick with the manufacturer’s original equipment, this Genuine Subaru Synthetic Motor Oil is the direct choice. It is the same formulation used in factory fill and is specifically recommended for models from 2018 to 2023. Using this oil ensures you are meeting the precise engineering specifications set by Subaru for your vehicle’s engine.
This oil is designed to provide optimal lubrication and protection for the unique configuration of the Subaru Boxer engine. It helps maintain engine efficiency and is formulated to work in harmony with all factory components. For those who value adherence to manufacturer standards above all else, this product offers complete peace of mind.
Mobil 1 Advanced Fuel Economy Full Synthetic 0W-20
Mobil 1 Advanced Fuel Economy is an excellent option for Crosstrek drivers focused on maximizing their miles per gallon. Its low-viscosity formula is engineered to reduce friction in the engine, which can directly contribute to improved fuel efficiency. This makes it a smart choice for daily commuting and long highway drives where fuel savings are most noticeable.
Beyond its economic benefits, this oil utilizes Mobil 1’s Triple Action Formula to deliver outstanding engine performance, protection, and cleanliness. It is designed to protect critical engine parts for up to 10,000 miles between oil changes, controlling oxidation to prevent oil breakdown. This combination of fuel economy and long-lasting protection makes it a very popular and reliable selection.
Mobil 1 Truck & SUV Full Synthetic Motor Oil 0W-20
If your Subaru XV Crosstrek is frequently tasked with carrying heavy loads, towing a small trailer, or driving in demanding conditions, the Mobil 1 Truck & SUV formula is worth considering. This oil is specially engineered for the higher stresses that SUVs experience, providing robust protection for engine components under strain.
It offers the same 10,000-mile protection potential as other Mobil 1 advanced synthetics but is fortified for the specific challenges of towing and hauling. The formulation has been proven in rigorous tests, including a 10,000 lb. towing test, ensuring it can handle the extra demands you might place on your Crosstrek during adventurous trips or practical chores.
Mobil Full Synthetic Motor Oil 0W-20, 5 Quart Case
For the Subaru owner looking for a balance of quality and value, particularly when buying in bulk, this case of Mobil Full Synthetic is a practical solution. This oil provides guaranteed protection for up to 7,500 miles between oil changes, which fits well with standard service intervals for many drivers.
The formulation provides excellent resistance to oil breakdown, ensuring long-lasting engine protection throughout its service life. It also features a balanced additive package that helps prevent the formation of engine deposits and sludge, contributing to a cleaner engine over time. Purchasing a case of three 5-quart containers ensures you have enough oil on hand for multiple changes.
Valvoline Restore & Protect Full Synthetic 0W-20
Valvoline Restore & Protect stands out with its innovative dual-action technology. It is the first motor oil designed to actively clean your engine while also protecting it from future wear. Its Active Clean Technology works with continuous use to remove up to 100% of engine deposits, which can help restore performance and efficiency.
In addition to its cleaning power, the Liqui-Shield Technology forms a protective layer on engine parts to help prevent new deposits from forming. Valvoline also states this formulation provides 79% stronger anti-wear protection than industry standards. This makes it a compelling option for older engines or for any owner who wants to prioritize engine cleanliness.
Pennzoil Ultra Platinum Full Synthetic 0W-20 Motor Oil
Pennzoil Ultra Platinum represents the top tier of the brand’s full synthetic lineup, designed to provide what the company calls unbeatable engine protection. A significant benefit is the impressive 20-year, 750,000-mile warranty that accompanies this oil, offering substantial long-term confidence in the product’s ability to protect your investment.
This oil is uniquely made from natural gas, which Pennzoil states allows it to provide better performance by keeping pistons cleaner than the toughest industry standards. For drivers who demand a premium product with a strong warranty and advanced formulation, Pennzoil Ultra Platinum is a top-tier contender for your Subaru’s engine.
Mobil 1 Advanced Full Synthetic Motor Oil 0W-20
As a flagship product from a leading brand, Mobil 1 Advanced Full Synthetic is a proven and reliable choice for the Subaru XV Crosstrek. It is engineered to deliver exceptional performance across a wide range of driving conditions, from extreme temperatures to stop-and-go city traffic. This oil is designed to provide comprehensive protection for all critical engine components.
The advanced full synthetic formula helps to prevent sludge and deposit formation, contributing to a cleaner engine over the long term. It also offers excellent viscosity stability, ensuring the oil maintains its protective properties throughout the recommended drain interval. For those who trust the Mobil 1 name and want a no-compromise oil, this is a solid option.
Valvoline Advanced Full Synthetic SAE 0W-20 Motor Oil
Valvoline Advanced Full Synthetic is another high-quality option that meets the needs of modern engines like the one in your Crosstrek. This oil is formulated to deliver robust protection against wear, heat, and deposits, helping to extend your engine’s life. It is designed to perform reliably under a variety of operating conditions.
The advanced additives in this formulation help to fight sludge and varnish buildup, maintaining engine cleanliness and efficiency. It provides a dependable layer of protection for daily driving and is engineered to meet or exceed the latest industry and engine manufacturer requirements. It is a trustworthy choice for consistent, quality engine maintenance.
How to Choose the Best 8W-20 Oil for Your Subaru XV Crosstrek
As a Subaru XV Crosstrek owner, I know that choosing the right oil isn’t just about ticking a box; it’s about protecting the heart of the car, the boxer engine. This unique engine design, with its horizontally opposed pistons, has specific lubrication needs. For most model years, especially newer ones, the manufacturer strongly recommends 0W-20 synthetic oil. However, some older models or specific driving conditions might make a 5W-20 or even a 5W-30 a consideration, but you should always consult your owner’s manual first. This guide is focused on finding the best 8W-20 oil for Subaru XV Crosstrek models, understanding that this specific viscosity is not a standard industry grade and is often a typo or miscommunication for the correct 0W-20.
The most critical factor is the API (American Petroleum Institute) certification. Look for the starburst symbol on the bottle that indicates it meets the latest API SP standard. This is non-negotiable for modern engines like the FA and FB series found in the Crosstrek. This certification ensures the oil has the right additives to prevent low-speed pre-ignition (LSPI), which is a big deal for turbocharged and even high-compression naturally aspirated engines. It also provides better protection against deposits and wear.
Next, you need to decide between conventional, synthetic blend, and full synthetic. For the Crosstrek, I always go with full synthetic. It simply performs better across a wider temperature range, offers superior protection against thermal breakdown, and helps with fuel economy. Given that many Crosstreks are all-wheel-drive systems that can be worked hard, the extra protection is a smart investment. Synthetic oil also flows better at cold starts, which is when a lot of engine wear happens.
Brand reputation matters, but the specification matters more. Brands like Pennzoil Platinum, Mobil 1, and Valvoline Advanced Full Synthetic are consistently highly rated and have formulations that meet and exceed Subaru’s requirements. Look for oils that also carry the ILSAC GF-6 specification, as this goes hand-in-hand with API SP and is designed for modern gasoline engines. Finally, think about your driving style. If you do a lot of short trips, towing, or drive in extreme temperatures, sticking with a high-quality full synthetic 0W-20 is your safest bet for keeping your Crosstrek running smoothly for years to come.
Frequently Asked Questions
Is 0W-20 oil really necessary for my Subaru Crosstrek?
Yes, it is strongly recommended and often required to maintain your warranty. Subaru engineers specifically designed the FA and FB series boxer engines to use this thinner, low-viscosity oil. It flows almost instantly at startup, providing critical lubrication to critical components and helping to achieve the advertised fuel economy. Using a heavier oil can lead to reduced fuel efficiency, increased engine wear, and potentially void your powertrain warranty if it leads to a failure.
Can I use 5W-20 instead of 0W-20 in my Crosstrek?
You should always default to what’s printed in your owner’s manual. For most modern Crosstreks, that is 0W-20. While 5W-20 is a common weight and shares the same hot viscosity, its cold-weather performance isn’t as good. The “0W” part means it flows better in freezing temperatures, protecting your engine during cold starts. In a pinch, it might be acceptable, but for long-term health and performance, I stick with the 0W-20 specification.
How often should I change the oil in my Subaru XV Crosstrek?
This depends on your model year and driving conditions. Newer models with the oil life monitoring system will tell you when it’s time, which is typically between 6,000 to 10,000 kilometers. If you have an older model without a monitor, the standard recommendation is every 6,000 kilometers or 6 months, whichever comes first. However, if you do a lot of stop-and-go driving, short trips, or operate in very dusty or hot conditions, changing it more frequently, like every 5,000 kilometers, is a good practice.
What is the difference between synthetic and conventional oil?
Conventional oil is refined directly from crude oil. Synthetic oil, on the other hand, is chemically engineered from base oils and additives to have a more consistent molecular structure. This gives it several advantages: it flows better in the cold, resists breaking down under high heat, and generally provides superior engine protection and cleanliness. For the best 8W-20 oil for Subaru XV Crosstrek performance and engine longevity, full synthetic is the clear winner.
Does the brand of oil really make a difference?
While the specifications (API SP, ILSAC GF-6) are the most important thing, brand can be an indicator of quality and additive package consistency. Major brands like Mobil 1, Pennzoil, and Castrol invest heavily in research and development. As long as the bottle has the correct certification starburst, a reputable brand gives me extra confidence that the oil will perform as expected over the entire drain interval.
Can I switch between different brands of oil?
Yes, you can. Modern synthetic oils from different brands are fully compatible with each other. There’s no need to “flush” the engine when switching brands, as long as the new oil meets the same API and viscosity specifications required by your Subaru. The important thing is to maintain the correct oil level and stick to a consistent change schedule.