Fleet diesel sales in July were up 35.1% year-on-year to 21% of the market, up from 19% at the start of the year. Diesel sales rose year-on-year in July from 12,848 to 17,359, while petrol sales were just 0.8% higher at 59,932 compared to 59,475 at the same period in 2000.
For the year-to-date, the overall fleet market dropped slightly, down 3.9% to 614,169, but diesel sales are booming, up 20.3% on the same period last year at 126,425, while petrol sales were down by 8.7% to 487,744 from 534,040 at the same period last year.
Most manufacturers offering diesel options are enjoying a booming market, with Ford's diesel sales up 32.8% in July to 3,322 from 2,502 last year.
Volkswagen's diesel sales rocketed by 79% last month to 2,943, while Citroen saw sales jump 108.3% to 1,104, Renault by 158.1% to 1,035 and Audi by 121.7% to 696. For the year-to-date, manufacturers are also showing healthy increases in diesel sales, with Citroen, Audi and BMW posting increases of more than 60%.
Mercedes-Benz saw sales jump 137% in July to 423, up from 178, while Nissan diesel sales in July grew to 376, up from 251, with year-to-date sales up 44.6% to 2,261.
Peugeot went against the trend, with diesel sales in July down 12.7% to 2,686 and year- to-date diesel sales down 2.6% to 24,218.
Steve Lambert, Peugeot fleet marketing manager, said: 'The 306 has been on run-out for a while and the 307 has just come to market. We have yet to get the 1.4 and 110bhp diesel engines, so supply is restricted.'