Briggs & Stratton Oil: Change It Or Not?

Maintaining a lawn mower can sometimes feel like navigating a maze of conflicting advice, especially when it comes to engine oil. For years, the golden rule has been regular oil changes, a fundamental step in prolonging engine life. However, Briggs & Stratton, a household name in small engines, has introduced a significant shift with their new EXi engine series, claiming these engines may never need an oil change. This radical departure from tradition has understandably sparked curiosity and, for some, a degree of skepticism. So, what’s the truth? Does your Briggs & Stratton lawn mower truly defy the need for an oil change, or are there nuances to this bold claim?

The answer, like many things in engine maintenance, isn't a simple 'yes' or 'no' for all models. It hinges entirely on the specific engine series powering your lawn mower. Understanding these distinctions is paramount to ensuring your machine remains in peak condition, avoiding costly repairs, and ultimately, extending its lifespan. Let's delve into the specifics of Briggs & Stratton's innovative approach and what it means for your garden equipment.

The EXi Engine Revolution: The 'Just Check and Add' Philosophy

Briggs & Stratton's EXi engine series marks a significant leap forward in lawn mower maintenance, simplifying what was once a routine, albeit messy, task. These engines are engineered with a groundbreaking 'Just Check and Add' philosophy, meaning they are designed to operate without the need for traditional oil changes. This isn't magic; it's the result of several key design improvements:

• Improved Air Cleaner Seals: A tighter seal on the air cleaner significantly reduces the amount of dirt and debris that can enter the engine. Contaminants are a primary reason for oil degradation and the need for frequent changes.
• Cooler Engine Temperatures: Engines that run cooler experience less thermal breakdown of the oil. This helps the oil maintain its lubricating properties for longer.
• High-Precision Manufacturing: Tighter tolerances and superior manufacturing processes minimise wear and tear within the engine, reducing the shedding of microscopic metal particles that would normally contaminate the oil.

These combined advancements mean that the oil in an EXi engine remains cleaner and more effective for extended periods. The company states that with regular scheduled mower maintenance, the EXi series lawn mower engine is the first that never needs an oil change. However, this doesn't mean you can forget about oil entirely. The EXi engine still requires consumers to check the oil level regularly and add oil as necessary. The emphasis shifts from changing the oil to simply topping it up.

Understanding the 'Just Check and Add' Debate

The concept of an engine that never needs an oil change can be hard to reconcile with decades of automotive wisdom. Many, like a relative who recently acquired a 'Just Check and Add' mower, laud it as a revolutionary convenience. Yet, memories of past engine failures, such as a neighbour's three-year-old riding mower with a dry sump after being told he 'never had to add oil', linger. This anecdote highlights a critical point: while the EXi engine might not need an oil change, it absolutely needs its oil level checked and maintained.

The reasoning behind Briggs & Stratton's 'Just Check and Add' approach likely stems from a pragmatic understanding of user behaviour. If some owners neglect oil changes entirely, it's perhaps better to have some oil in the sump, even if it's aged, than no oil at all. An engine running on old oil is generally preferable to one running dry. The question remains, however, whether this marketing strategy translates to lower engine failures compared to similar engines that still recommend traditional oil changes. While specific comparative data isn't readily available, the design improvements in EXi engines suggest a genuine effort to reduce reliance on oil changes by improving internal engine cleanliness and efficiency.

Traditional Oil Change Requirements for Other Briggs & Stratton Engines

It's crucial to remember that the 'Just Check and Add' feature is specific to the EXi engine series. If your Briggs & Stratton engine is not an EXi model, then the traditional rules of oil maintenance still apply. Experts recommend changing the oil in such engines every 50 hours of operation or at the end of every mowing season, whichever comes first. For new lawn mowers with non-EXi engines, there's an even more critical initial oil change: it's necessary to change the oil after the first five hours of operation. This initial change helps remove any manufacturing debris or break-in contaminants that might be present in the engine oil after its first few hours of running.

Oil Change Frequency Comparison

Beyond Oil: Essential Lawn Mower Maintenance Steps

Regardless of your engine type – EXi or otherwise – regular scheduled maintenance is vital for ensuring your lawn mower runs efficiently and has a long life. The oil system is just one component; several other elements require your attention:

1. Change the Air Filter: A clean air filter is paramount for engine health. It prevents dirt and debris from entering the engine, which can cause significant wear. For the EXi engine series, changing the air filter is incredibly simple, often requiring no tools. Always consult your owner's manual to determine your specific air filter type (foam, paper, or combination) and replace it regularly.
2. Check the Spark Plug: The spark plug is responsible for igniting the fuel-air mixture in the engine. A worn or fouled spark plug can lead to difficult starting, rough running, and reduced power. Briggs & Stratton genuine spark plugs are typically pre-gapped and straightforward to replace. It's a good practice to replace your spark plug each season to avoid frustrating stalled-starts and ensure reliable operation.
3. Fuel Treatment and Stabilisation: Did you know that petrol can go stale in as little as 30 days? Stale petrol can cause significant problems for your engine, leading to gumming up carburettors and fuel lines. Using a high-quality fuel treatment and stabiliser, such as Briggs & Stratton's Advanced Formula Fuel Treatment and Stabilizer, regularly can prevent these issues. This is especially important for mowers stored over winter.

Navigating Oil Changes on Challenging Engines

While the EXi series simplifies oil maintenance, some other Briggs & Stratton engines, even newer ones like the 500e series mentioned by users, can pose a challenge when it comes to draining the oil. Unlike older models with easily accessible drain plugs, some designs make it incredibly awkward, often requiring the mower to be tipped significantly, which can lead to spills and mess. This design choice, while perhaps having a valid manufacturing reason, can be a real hassle for home mechanics and professionals alike.

For those encountering such difficulties, investing in an oil extractor kit can be a game-changer. These kits allow you to draw the old oil out through the dipstick tube, eliminating the need to tip the mower or struggle with hard-to-reach drain plugs. This not only makes the process cleaner but also much more efficient, especially for those who regularly service multiple mowers or refurbish machines for resale.

Frequently Asked Questions (FAQs)

Do all Briggs & Stratton engines never need an oil change?

No, only the new EXi engine series is designed with the 'Just Check and Add' feature, meaning it doesn't require traditional oil changes. Other Briggs & Stratton engines still require regular oil changes.

How often should I check the oil level on my EXi engine?

While specific intervals aren't always provided, it's generally good practice to check the oil level before each use, or at least every few uses, to ensure it remains within the recommended range. Add oil as necessary.

What happens if I don't change the oil on a non-EXi engine?

Neglecting oil changes on engines that require them can lead to severe engine damage. The oil degrades over time, losing its lubricating properties, leading to increased friction, overheating, and ultimately, premature engine failure. A dry sump, as in the anecdote, is catastrophic.

What type of oil should I use for my Briggs & Stratton engine?

Always consult your lawn mower's owner's manual for the correct oil type and viscosity recommended for your specific Briggs & Stratton engine model. Using the wrong oil can damage your engine.

Why is changing the air filter important, even if the oil doesn't need changing?

A clean air filter is crucial because it prevents dirt, dust, and debris from entering the engine's combustion chamber. Contaminants can cause significant wear on internal components, regardless of how clean the oil is, leading to reduced performance and engine damage.

Why does lawn mower petrol go stale?

Petrol contains volatile compounds that evaporate over time, especially when stored in an open or vented fuel tank. This evaporation leaves behind heavier, gummy residues that can clog fuel lines, carburettors, and injectors, making starting difficult or impossible. Fuel stabilisers help slow down this degradation process.

In conclusion, the question of whether a Briggs & Stratton lawn mower needs an oil change is answered by understanding your specific engine model. While the innovative EXi series offers the convenience of 'Just Check and Add' – eliminating the need for traditional oil changes – it's crucial to remember that regular oil level checks and additions are still required. For all other Briggs & Stratton engines, adhering to the recommended oil change schedule (every 50 hours or annually, with an initial change after 5 hours for new engines) is non-negotiable for engine longevity. Beyond oil, don't overlook the importance of a clean air filter, a healthy spark plug, and stabilised fuel. By following these comprehensive maintenance steps, you can ensure your Briggs & Stratton powered lawn mower remains a reliable workhorse for many seasons to come, cutting smoothly and efficiently without unexpected breakdowns.

If you want to read more articles similar to Briggs & Stratton Oil: Change It Or Not?, you can visit the Maintenance category.