Franchised dealers made an average loss of £16,000 in August, typical of the month before the plate change in September.
The new car market has reached a level where the industry is being damaged by such high volume being pushed into the UK.
The more pre-regs that enter the market, the stronger price distortions become.
The average UK motor dealership produced a small loss of £384 in May, a contrast to the £5,000 profit made in the same month of the prior year.
The average UK motor dealership produced a marginal profit in April 2015 of £3,000.
There are a number of key factors that can demonstrate the depth of confidence that is showing in the used retail market and the impact of the new car market
Number of nearly new cars in the retail market has nearly doubled in the last six months, indicating that manufacturers are pre-registering increasing numbers.
Car buyers are prepared to pay 32% more for a car than they were two years ago, a sign of rising consumer confidence.
The average UK motor dealership produced recorded a profit of just under £93,000 in March.
Nearly half a million new cars were registered in the UK during the crucial March 2015 plate-change month.