Infiniti M45x Engine Oil Specs
Engine oil type, capacity & service interval for the Infiniti M45x (2008–2010). Select your year below for full specifications.
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Oil grade changes by year
Do not assume every Infiniti M45x year uses the same oil. Some years specify 5W-30 (years 2010, 2008) while others specify 10W-30 (years 2009). Select your exact year and engine configuration before buying oil.
Select Year – Infiniti M45x Engine Oil
3 years foundInfiniti M45x Engine Oil Specs by Year
All 3 yearsInfiniti M45x Engine Oil Guide
The Infiniti M45x was produced from 2008 to 2010. This model typically uses 5W-30 full synthetic engine oil — a specification common to most Infiniti M45-series vehicles.
Selecting the correct oil viscosity for your Infiniti M45x is essential. Using a grade that is too thin reduces protection at operating temperature, while too thick an oil impairs cold-start flow and reduces fuel economy. Always match the exact grade shown for your specific model year.
The recommended oil change interval for the Infiniti M45x is every 5,000 miles or 6 months. Under severe driving conditions — track use, towing, or frequent cold starts — shorten this interval by 25–30%.
When servicing your Infiniti M45x, always replace the oil filter at every oil change. Using a quality filter — such as Fram, Mobil 1, or OEM equivalent filters — ensures clean oil circulation through the engine block.
Oil change costs for the Infiniti M45x at a US dealership or local service center typically range from $60 to $110 for a standard synthetic blend or full synthetic service. DIY oil changes cost approximately $30–$65 in parts (oil + filter) and take about 30 minutes with the right tools.
Always consult your vehicle's owner's manual to confirm the exact specification for your specific trim and engine variant, as some Infiniti M45x configurations may have different requirements.
Always use the viscosity grade recommended in your vehicle's owner's manual to ensure proper lubrication and maintain warranty coverage.
Perform periodic dipstick checks to ensure proper oil levels, especially prior to long road trips or heavy load use.