If you are claiming Motor Vehicle or Travel expenses for your rental property, CRA requires you to record your KMs travelled and a total of your expenses (fuel,repairs,insurance) and claim only the percentage that applies.
From the CRA Rental Income guide:
Personal use of a motor vehicle:If you use a motor vehicle (including passenger vehicle) for both earning rental income and for personal use, you can deduct only the percentage of expenses related to earning the rental income. To support the amount you can deduct, keep a record of both the total kilometres you drove and the kilometres you drove to earn rental income.
https://www.canada.ca/en/revenue-agency/services/tax/businesses/topics/rental-income/completing-form...
