According to:
Customer ConnectIndustry Standards for Normal Engine Oil Consumption:
Mileage below 50,000 miles / 80,000 kilometers: Normal oil consumption is one quart for each 1,000 miles driven / one litre for every 1600 km's driven.
Mileage above 50,000 miles / 80,000 kilometers: Normal oil consumption is one quart for each 750 miles driven / one litre for every 1200 km's driven.
Oil consumption can vary, in each vehicle, due to many different circumstances. Some of the following are examples under which oil consumption may increase on a vehicle:
1. Age and mileage due to normal engine wear.
2. During engine break-in time, typically up to about 7500 miles
3. During severe service use such as heavy loading, towing, off road, etc.
4. Sustained high speed driving.
5. If there is a failure to comply with recommended oil type and viscosity ratings as outlined in the owners manual.
In order for excessive oil consumption to be determined, a supervised oil consumption test must be performed by the dealership, and an evaluation made.
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