1. Change your oil regularly: Regular oil changes around every 3,000 miles or so ensures that your engine stays clean and lubricated, reducing wear and tear. 2. Use high-quality fuel: Using high-quality or premium fuel can help your engine run better and extend its life span. 3. Replace spark plugs and ignition system: These parts are critical for your engine to start and run. Over time, they can become worn out and hinder your engine's performance. 4. Maintain your cooling system: Overheating is one of the worst things for an engine. Regularly check and maintain your radiator, water pump, thermostat and cooling fan to ensure they are all operating properly. 5. Clean or replace your air filter: Your engine needs a constant supply of clean air to run properly. A dirty or clogged air filter can cause a range of issues, including reducing your engine's power and acceleration. 6. Regularly check and maintain your engine's belts: The timing and serpentine belts are vital parts of your engine. Over time, these rubber parts can crack, break or slip, causing severe engine damage. 7. Get regular tune-ups: Even with proper care, your car will need a regular tune-up to keep it running optimally. A good tune-up will include an oil and filter change, tests on the fuel, ignition and emissions systems, a visual check of the engine and more. 8. Drive gently: Aggressive driving can lead to quicker wear and tear on your engine. Practicing smooth acceleration and deceleration, and avoid overloading your vehicle. 9. Keep the engine clean: Keep the engine clean from debris, dirt and grime. This can improve its lifespan significantly. 10. Don’t ignore the check engine light: If it turns on, it’s signaling that something is wrong with the engine. Hence, don’t avoid it and get it checked by a professional. Proper care and attention will keep your car's engine running smoothly for many miles to come. Always consult with a trusted mechanic or official car service center when you have concerns with your car's performance.

To clean oil off an engine block, start by ensuring the engine is cool to avoid burns. Protect electrical components with plastic bags. Apply an engine degreaser liberally to the oil-stained areas, following the product's instructions—usually letting it sit for 3-5 minutes. Use a stiff-bristled brush to scrub tough spots, being careful not to damage any parts. Rinse the engine with a low-pressure hose or water source; high pressure can force water into sensitive areas. After rinsing, wipe down the engine with a microfiber cloth. For stubborn oil residue, repeating the degreasing process may be necessary. Always dispose of waste properly to protect the environment. Regular cleaning can prevent oil buildup, making future cleanings easier and keeping your engine running efficiently.

Yes, you can rebuild your own engine though it requires a considerable amount of skill, knowledge, experience, and the right tools. It's a complex job that involves dismantling, inspecting, cleaning, and replacing or repairing various parts of the engine. You should be sure to thoroughly understand the process and be confident in your mechanical abilities before attempting to rebuild an engine yourself. It's often best done by a trained professional.