The 94,000 litres of toxic sludge dumped by criminals involved in the illegal operations was enough to fill 500 domestic wheelie bins, according to HMRC staff.
It costs an estimated £1.13m in public funding to dispose of the waste.
New details were disclosed as senior officials warned there would be no let-up in 2013 in the crackdown against the gangs involved, mostly in the border regions.
Pat Curtis, national oils co-ordinator for HMRC, said: "Laundered fuel is sold at a reduced price and motorists may think they are getting a good deal because it is cheaper. But I would caution them to think again as the true cost is far from a bargain for anyone.
"We will continue to carry out raids and roadside checks to detect those attempting to smuggle, launder, sell or use illicit fuel. We are all losing out."