Toronto's Auditor General says nearly a fifth of the city's fleet of light-duty trucks and vans are rarely used.
Some of them sit parked for so long that they're literally collecting dust.
The case is made in an upcoming report obtained by CTV Toronto.
It argues these vehicles are not being used enough to justify the cost.
The Auditor found that 230 of them were driven less than 5,000km per year.
The City paid $10 million for those vehicles and spends more than $300,000 each year to maintain them.
The city is also paying out large sums of money in mileage expenses to employees who use their own vehicles for city business, instead of ones that are owned by city hall.
A total of six city divisions and Toronto's social housing agency paid out a total of $1.5 million in mileage last year.
More than 90 employees were reimbursed for driving more than 5,000 km in their personal cars over the same period.
The Auditor is calling for stronger oversight.
City officials say they will not comment until the full report is released next week.