A fuel composition for powering a combustion engine, the composition comprising: a liquid base fuel; and a (co)polymer obtainable by (co)polymerizing at least the following monomers: • at least one bicyclic (meth)acrylate ester, wherein the bicyclic (meth)acrylate ester is of the general formula wherein R is H or -CH 3, A is -CH 2 -, -CH (CH 3)- or -C(CH 3) 2 -, and M is covalently bonded to a carbon atom of the six-membered ring and is selected from the group consisting of hydrogen and a methyl group or a plurality thereof, • at least one lower-alkyl (meth)acrylate, wherein the lower-alkyl (meth)acrylate is a C 1 -C 7 alkyl (meth)acrylate, • optionally at least one aromatic vinyl monomer, and • optionally other ethylenically unsaturated monomers, wherein the copolymer comprises: • 22 to 95 wt% of the bicyclic (meth)acrylate ester; • 5 to 78 wt% of the lower-alkyl (meth)acrylate; • 0 to 45 wt% of the aromatic vinyl monomer; • 0 to 50 wt% of other ethylenically unsaturated monomers, up to a total of 100 wt%, wherein the weight percentages of the monomer are based on the total weight of all the monomers, and wherein the copolymer has a weight averaged molecular weight (Mw) of 1, 500, 000 to 10, 000, 000 Dalton, wherein Mw is determined in accordance with GPC-MALS method d) as herein described. a liquid base fuel; and a (co)polymer obtainable by (co)polymerizing at least the following monomers: • at least one bicyclic (meth)acrylate ester, wherein the bicyclic (meth)acrylate ester is of the general formula wherein R is H or -CH 3, A is -CH 2 -, -CH (CH 3)- or -C(CH 3) 2 -, and M is covalently bonded to a carbon atom of the six-membered ring and is selected from the group consisting of hydrogen and a methyl group or a plurality thereof, • at least one lower-alkyl (meth)acrylate, wherein the lower-alkyl (meth)acrylate is a C 1 -C 7 alkyl (meth)acrylate, • optionally at least one aromatic vinyl monomer, and • optionally other ethylenically unsaturated monomers, wherein the copolymer comprises: • 22 to 95 wt% of the bicyclic (meth)acrylate ester; • 5 to 78 wt% of the lower-alkyl (meth)acrylate; • 0 to 45 wt% of the aromatic vinyl monomer; • 0 to 50 wt% of other ethylenically unsaturated monomers, up to a total of 100 wt%, wherein the weight percentages of the monomer are based on the total weight of all the monomers, and wherein the copolymer has a weight averaged molecular weight (Mw) of 1, 500, 000 to 10, 000, 000 Dalton, wherein Mw is determined in accordance with GPC-MALS method d) as herein described. • at least one bicyclic (meth)acrylate ester, wherein the bicyclic (meth)acrylate ester is of the general formula wherein R is H or -CH 3, A is -CH 2 -, -CH (CH 3)- or -C(CH 3) 2 -, and M is covalently bonded to a carbon atom of the six-membered ring and is selected from the group consisting of hydrogen and a methyl group or a plurality thereof, R is H or -CH 3, A is -CH 2 -, -CH (CH 3)- or -C(CH 3) 2 -, and M is covalently bonded to a carbon atom of the six-membered ring and is selected from the group consisting of hydrogen and a methyl group or a plurality thereof, • at least one lower-alkyl (meth)acrylate, wherein the lower-alkyl (meth)acrylate is a C 1 -C 7 alkyl (meth)acrylate, • optionally at least one aromatic vinyl monomer, and • optionally other ethylenically unsaturated monomers, wherein the copolymer comprises: • 22 to 95 wt% of the bicyclic (meth)acrylate ester; • 5 to 78 wt% of the lower-alkyl (meth)acrylate; • 0 to 45 wt% of the aromatic vinyl monomer; • 0 to 50 wt% of other ethylenically unsaturated monomers,