TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The fuel composition further comprises a demulsifier, an antifoam agent, cold flow agent, and/or a dispersant/detergent additive. The fuel composition is a fuel additive composition. Preferred Components: The substituted hydrocarbon is a hydrocarbyl substituted acylating agent having di-acid functionality. The substituted hydrocarbon is a succinic acylating agent. The hydrocarbyl group of the substituted hydrocarbon comprises polyisobutylene. The substituted hydrocarbon agent is selected from hydrocarbyl substituted succinic anhydrides; and/or hydrolyzed hydrocarbyl substituted succinic anhydrides. The dispersant/detergent additive comprises succinimide dispersants and/or quaternary ammonium salts. EXAMPLE - An EU certification diesel fuel, known as RF-06, was treated with 200 parts per million (ppm) of a commercially available succinimide dispersant. Two 500 Ml graduated cylinders were prepared for testing by placing in each a 4 cm section of a ZN007902 (RTM: zinc rod having a length of 200 mm and a diameter of 2.0 mm). The weight of each rod section was recorded and an amount of fuel was added to each cylinder so that the combined mixture of fuel composition and zinc rod was 1% by weight zinc. Each cylinder was charged with a slightly different amount of fuel to ensure the zinc content of each sample was the same. One sample was kept as a baseline (control) and the other sample (test) was treated at 200 ppm of the additional additive Pentasize 68F (RTM: succinic anhydride derived from 16-18C polyolefin). The containers were stored at ambient conditions in a dark test location for 14 days. Each sample was tested at the 7 day mark and the 14 day mark by Inductively Coupled Plasma (ICP) analysis to determine zinc content. The results showed that the test sample showed zinc level of 0.0 ppm at 7 days and 0.1 ppm at 14 days whereas the control sample showed a zinc level of 0.6 ppm at 7 days and 1.3 ppm at 14 days.