What's with you guys, Kerosene Oil? Similar stuff? O'Cmon
Brothers, for cars like 2009-2011 XLi, GLi........First Thing First get an ECU Protective cover (good quality locally made and sold for Rs.400/-). Avoid the hi speed jets/nozzles that the service stations use. We are talking about the engine guys, get professional quality engine cold start cleaners/degreasers and if used properly as per instructions, you'll see the results. Every engine/bay cleaned with even sarson ka oil will give a nice look immediately but you'll know after two days of driving.