Understanding how to properly check your motorcycle’s oil is crucial for engine health and longevity. For BMW motorcycle owners, especially those with older models like the R1100 and R1150, the Oil Check procedure might seem a bit unusual, particularly the instruction involving the sidestand. Let’s delve into the reasons behind BMW’s recommendations and explore the best practices for getting an accurate oil level reading.
For owners of the BMW R1100 and R1150 series, the sidestand isn’t just for parking; it’s a key part of the oil check process. These older engine designs had a characteristic where oil could become trapped in areas outside of the sump when the bike was parked upright. Parking the motorcycle on its sidestand for a few minutes allows this trapped oil to drain back into the sump. This drainage is essential for ensuring an accurate oil level reading through the sight glass. Without using the sidestand, you might get a falsely low reading, leading to unnecessary oil top-ups.
BMW also advises checking the oil level when the engine is fully warmed up. The rationale behind this is that oil expands slightly when hot. However, this recommendation has been questioned by experienced riders. Waiting for the engine to fully warm up before each oil check isn’t always practical, especially as part of a pre-ride inspection routine. Many riders, including seasoned BMW owners, find it more convenient and equally effective to check the oil level when the engine is cold.
Checking your oil cold is a perfectly viable alternative. When cold, the oil level will typically be a bit lower in the sight glass compared to a hot reading – approximately 1/8″ lower is a reasonable expectation. This difference between hot and cold readings is generally less significant than the difference between the minimum and maximum oil level marks on the sight glass. Therefore, a cold oil check can still provide a reliable indication of whether your oil level is within the acceptable range.
Ultimately, the goal is to maintain the correct oil level in your motorcycle’s engine. While BMW’s official procedure emphasizes a warm engine and sidestand for older models, understanding the underlying reasons allows for some practical adjustments. Whether you choose to check your oil hot or cold, the crucial takeaway is to perform regular oil checks and ensure the level is consistently between the minimum and maximum marks on your motorcycle’s sight glass. This proactive approach to maintenance is what truly safeguards your engine’s health.
