Oil Change Interval Calculator
Interval index from conditions and oil type.
Inputs
Results
Recommended interval (miles)
9,000
Oil changes per year2
Cost per oil change (DIY)$48.00
Annual oil cost$96.00
Months between changes6
Max time limit (months)12
How to Use This Calculator
- Enter Oil type, Conventional, and Synthetic blend.
- Set Full synthetic, Driving conditions, and Mostly highway.
- Adjust Mixed driving, Severe (city, towing, dusty, extreme temps) as needed.
- Review the Recommended interval (miles) result.
- Use Oil changes per year and Cost per oil change (DIY) ($) to inform your decision.
What each input means
- Oil type
- Select the oil type
- Driving conditions
- Select the driving conditions
- Annual mileage
- How many miles you drive per year.
- Vehicle age (years)
- Older engines may need more frequent changes.
- Oil cost per quart ($)
- Price per quart of your chosen oil.
- Oil capacity (quarts)
- Your engine's oil capacity (check owner's manual).
What each result means
- Recommended interval (miles)
- Miles between oil changes based on your conditions.
- Oil changes per year
- Number of oil changes needed annually.
- Cost per oil change (DIY)
- Oil and filter cost per change.
- Annual oil cost
- Total yearly cost for oil changes (materials only).
- Months between changes
- Calendar interval between oil changes.
- Max time limit (months)
- Maximum calendar time between changes regardless of mileage.
How this is calculated
Worked example, using the default values
- Identify Input Parameters4 parametersOil type = 2, Driving conditions = 1, Annual mileage = 12000, Vehicle age (years) = 5 = 6 input(s) provided
- Calculate Recommended intervalRecommended interval9000 = 9000
- Calculate Oil changes per yearOil changes per year = max(changesPerYear, timeBasedChangesPerYear)2 = 2
- Calculate Cost per oil changeCost per oil change = oilCost + filterCost48 = $48
Engine last updated . Checked against 2 independently-derived tests — how we verify calculators.
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