NOVELTY - Powering (M1) compression ignition engine using a main fuel comprising methanol and water involves fumigating intake air stream with a fumigant comprising an ignition enhancer; introducing the fumigated intake air into a combustion chamber in the engine and compressing the intake air; introducing the main fuel into the combustion chamber; and igniting the main fuel/air mixture to drive the engine.    USE - For powering compression ignition engine, as power generation system adapted to power rail vehicle and for use on the marine vehicle; for transporting a two-part pre-fuel composition, a two-part fuel in operating compression ignition engine (claimed).    ADVANTAGE - The process results in simplification and lower cost of fuel manufacture and reduced environmental impact by elimination of the need for production of high purity components and by-product components. The water generated during fuel combustion can be recovered, which is major advantage for remote areas where water is scarce. Also heat generated in operation of the diesel engine can be utilized for local area heating requirements. The process provides several benefits such as: development of remote resources that otherwise remain undeveloped due to unsuitability (e.g. high sulfur); provides seamless options for efficient biomass co-processing to reduce CO2; virtually eliminates all non-CO2 pollutants arising from the production stage of electric power; captures hydrogen from resources to the maximum extent possible and convert these resources to water for use by demand centers; provides waste heat to local communities by a hot water loop (HWL) cooling down the exhaust and exchanging this major source of heat energy for heating or refrigeration purposes; efficiently recovers water and heat, high recovery of water is obtained, in the vicinity of 0.7-1 ton irrigation water per ton of methanol consumed; provides pH neutral irrigation water for direct use by local communities; provides a water washed exhaust which neutralizes acids and removes particulates down to low levels.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) a compression ignition engine fuel for use in a compression ignition engine which is fumigated with a fumigant comprising an ignition enhancer into an air inlet of the engine;    (2) a two-part fuel for use in operating a compression ignition engine with fumigation of ignition enhancer into an air inlet of the engine, the fuel composition comprising: a main fuel composition containing methanol and water, and a secondary fuel component comprising an ignition enhancer;    (3) supplying (M2) fuel to a compression ignition engine involving: supplying a main fuel composition comprising methanol and water to a first tank that is in fluid connection to a combustion chamber of the compression ignition engine, and supplying a secondary fuel component comprising an ignition enhancer to a second tank that is in fluid connection to an air intake of the compression ignition engine;    (4) a power generation system (M3) involving: powering a compression ignition engine using a methanol-water fuel to generate power; preheating an inlet air stream of the compression ignition engine, and/or fumigating the inlet air stream with an ignition enhancer; treating engine exhaust to recover exhaust heat and/or water from the engine, and redirecting the heat and/or water for further use;    (5) transporting (M4) a two-part pre-fuel composition comprising methanol and ether, including transporting the pre-fuel from a first location to a second location remote from the first location, and separating the ether from the methanol to yield a first fuel part comprising methanol, and a second fuel part comprising ether;    (6) a pre-fuel composition comprising methanol and up to 10 wt.% of ether.    DESCRIPTION OF DRAWING(S) - The figure shows a flow chart illustrating process for powering a compression ignition engine.