Composition for cleaning combustion engine systems

A composition for cleaning a combustion engine system, wherein the composition comprises:

• a hydrocarbon, wherein the hydrocarbon comprises respective first and second hydrocarbons, wherein the first hydrocarbon comprises a lubricant, wherein the lubricant has a flash point, measured according to ASTM D93, of less than 80° C., wherein the second hydrocarbon comprises an aromatic hydrocarbon, wherein the aromatic hydrocarbon has a flash point, measured according to ASTM D93, of greater than 62° C.;
• an oxygen donor, wherein the oxygen donor comprises respective first and second oxygen donors, wherein the first oxygen donor comprises a hydroxyl group and has a flash point, measured according to ASTM D93, of from 45° C. to 95° C., wherein the first oxygen donor comprises benzyl alcohol, and wherein the second oxygen donor comprises a carbonyl group or an ether group and has a flash point, measured according to ASTM D93, of from 50° C. to 120° C.;
• and wherein the composition comprises 5 to 15% by volume lubricant, 40 to 60% by volume aromatic hydrocarbon, 10 to 30% by volume benzyl alcohol, and 10 to 30% by volume second oxygen donor.