At Engine Clean UK we help private, trade and commercial customers keep their vehicles on the road for longer saving on expensive repair bills.Our proven technology works to improve any vehicle that runs on either petrol or diesel, reducing emissions and improving performance has also seen by scores of people save hundreds of pounds per year with improved MPG. Our proven technology works to improve any vehicle that runs on either petrol or diesel, reducing emissions and improving performance has also seen scores of people save hundreds of pounds per year with improved MPG.