Stabilized distillate fuel oils and additive compositions therefor

Claim 1

A DISTILLATE HYDROCARBON FUEL OIL CONTAINING (A) FROM 0.00017% TO ABOUT 0.01% BY WEIGHT OF AN OIL-SOLUBLE POLYMERIC DISPERSANT TAKEN FROM THE GROUP CONSISTING OF (A1) A COPOLYMER COMPRISING IN COPOLYMERIZED FORM FROM 10% TO 30% BY WEIGHT OF A C8-C18 ALKYL CHLOROPROPYLENEOXY ESTER OF A C4C5 UNSATURATED CONJUGATED DIBASIC ACID AND FROM 90% TO 70% BY WEIGHT OF A COPOLYMERIZABLE MONOMER TAKEN FROM THE GROUP CONSISTING OF VINYL ESTERS OF C1-C4 FATTY CARBOXYLIC ACIDS, C8C20 ALKYL MALEATES, C8-C20 ALKYL FUMARATES, AND MIXTURES THEREOF, SAID COPOLYMER HAVING A MOLECULAR WEIGHT BETWEEN 6,000 AND 20,000 STAUDINGER, AND (A2) A COPOLYMER COMPRISING IN COMPOLYMERIZED FORM FROM 5% TO 30% BY WEIGHT OF AN N-VINYL PYRROLIDINONE TAKEN FROM THE GROUP CONSISTING OF N-VINYL PYRROLIDINONE AND RING-ALKYLATED NVINYL PYRROLIDINONES HAVING FROM 7 TO 10 CARBON ATOMS IN THE MOLECULE, 65% TO 95% BY WEIGHT OF AT LEAST ONE ACYLIC ESTER OF FORMULA CH2=C(R)COOR1 WHEREIN R IS A MEMBER OF THE GROUP CONSISTING OF HYDROGEN AND METHYL RADICALS AND R1 STANDS FOR AT LEAST ONE ALKYL GROUP OF FROM 4 TO 18 CARBONS AND HAVING AN AVERAGE OF AT LEAST 8 CARBON ATOMS, AND 0% TO 5% BY WEIGHT OF AN AMINOALKYL ACRYLATE OF THE FORMULA CH2=C(R)COOCNH2NNR2R3 WHEREIN R IS A MEMBER OF THE GROUP CONSISTING OF HYDROGEN AND METHYL RADICALS, CNH2N STANDS FOR AN ALKYLENE RADICAL WHEREIN N IS AN INTEGER OF FROM 2 TO 3, AND R2 AND R3 ARE MEMBERS OF A GROUP OF C1-C4 ALKYL RADICALS WHEN TAKEN INDIVIDUALLY AND MEMBERS OF A GROUP OF ETHYLENE, TRIMETHYLENE, TETRAMETHYLENE AND DIETHYLENEOXY RADICALS WHEN TAKEN TOGETHER, AND (B) FROM 0.00017% TO ABOUT 0.01% BY WEIGHT OF AN N-SUBSTITUTED CYCLOHEXYLAMINE IN WHICH THE SUBSTITUENTS CONSIST OF 2 ALKYL GROUPS OF 1 TO 2 CARBON ATOMS.