The recommended oil for a 2007 Buick Lucerne is SAE 5W-30 that meets API standards, with different oil capacities depending on the engine. The Lucerne offered two engines that year: a 3.8-liter V6 and a 4.6-liter Northstar V8. In general, 5W-30 is suitable, and Dexos branding is not required for this model year.
In more detail, the Lucerne’s oil needs vary by engine. This article outlines the specific guidance for each engine option, including viscosity, API/suitability, and approximate fill volumes. Always consult the owner’s manual or a dealership for the exact specification for your VIN, especially if you operate in extreme climates or have modified engine components.
Engine options and oil specifications
Here is a concise reference for the two engines that could be found in a 2007 Lucerne, covering the recommended viscosity, API category, and typical oil capacity with a filter change.
- 3.8L V6 (3800 Series II): Recommend SAE 5W-30 oil, either conventional or synthetic. Look for API SN or newer; Dexos branding is not required for this year. Typical oil capacity with a filter is about 4.5 quarts.
- 4.6L Northstar V8 (CXS): Recommend SAE 5W-30 oil, either conventional or synthetic. Look for API SN or newer; Dexos branding is not required for this year. Typical oil capacity with a filter is about 7 quarts.
Bottom line: Both engines share the same general viscosity guidance (5W-30) but differ in how much oil they hold—roughly 4.5 quarts for the V6 and about 7 quarts for the Northstar V8.
Practical notes on oil type and climate
In very cold climates, some owners consider 5W-20 as an alternative in certain GM engines, but 5W-30 remains the standard recommendation for the 2007 Lucerne in most conditions. Synthetic oil can offer better high-temperature stability and longer intervals if your driving profile supports it, while conventional oil is perfectly acceptable if you follow the manufacturer’s change schedule.
Always verify the exact specification for your vehicle’s engine and climate. Using a high-quality oil filter and adhering to GM’s recommended change intervals are important for engine longevity.
How to check and top up
Park on level ground and allow the engine to cool before checking the oil. Using the dipstick, assess the current level and add oil in small increments if needed, rechecking after each addition to avoid overfilling. If you’re unsure about the capacity for your specific model, start with about half a quart and confirm the reading.
With the engine type in mind, replace the oil filter with every oil change and use a filter that meets OEM specifications. Keeping to a regular maintenance schedule helps ensure long-term engine health.
Summary
The 2007 Buick Lucerne requires 5W-30 engine oil for both available engines, with an approximate capacity of about 4.5 quarts for the 3.8L V6 and about 7 quarts for the 4.6L Northstar V8. Dexos certification is not required for this year. Always consult the owner’s manual for the exact oil specification for your VIN and climate, and maintain your oil and filter changes on schedule to maximize engine life.
Quick reference takeaway
For a 2007 Buick Lucerne, use SAE 5W-30 oil meeting API SN or newer. The 3.8L V6 uses roughly 4.5 quarts; the 4.6L Northstar V8 uses roughly 7 quarts. Dexos is not required for this year.