Is there any difference between a lubricant and grease? Do they share the same property?
A-Grease is oil that has a soap-like additive included. The soap is added to thicken the oil so that it will adhere better to bearing surfaces or other areas. Also added are other elements such as lithium, calcium and copper, according to the purpose for which the grease is intended. Greases are designed to be held in place while the bearing surfaces, cables, threads, cantilever bosses, seat posts and other parts are operating. Both grease and lubricating oil are designed to reduce friction and heat by creating a barrier between two moving materials. Oil-type lubricants are for chains, levers and gear sets, where a pump of some type is used to continuously circulate the oil in a particular application. Greases and oils both lubricate similar materials, but some applications favor one type over the other. For example, grease can provide a sealing film against moisture or dirt whereas oil can be used to cool gear sets more quickly and evenly.
How can I clean the lubricant out of my bearing?
Clean your bearings when they become dirty or noisy with the most environmentally friendly cleaner you can find that is suitable for dissolving oil, grease, and removing dirt from the steel, plastic and rubber surfaces. Citrus based cleaners can work, but they tend to leave behind a slight residue. Solvents are dangerous to use, but often provide a superior solution to cleaning very dirty bearings. If you use water based cleaner like a citrus cleaner or a detergent, be sure to dry your bearings IMMEDIATELY and then re-coat them with lubricant to prevent rust. You can also use any of the solvents like acetone or pure alcohol, you can use paint thinner or lacquer thinner, but these cleaners are oil based and may leave an oily residue on the inner surfaces of your bearings. If you use a solvent cleaner, please wear appropriate rubber gloves and work in a safe well-ventilated area. When you are finished, please remember to dispose of your solvent in a safe, ecologically sound manner.
On the packaging, what does grade number (0W, 5W, 10W, 15W, 20W, 25W), Mean? What is use of applying multi-grade lubricants for our vehicles?
Most oils on the shelves today are “Multigrade”, which simply means that the oil falls into 2 viscosity grades (i.e. 10w-40 etc.). Multigrade was first developed some 50 years ago to avoid the old routine of using thinner oil in winter and a thicker oil in summer. In a 10w-40 for example the 10w bit (W = winter, not weight or watt or anything else for that matter) simply means that the oil must have a certain maximum viscosity/flow at low temperature. The lower the “W” numbers the better the oil’s cold temperature/cold start performance. The 40 in a 10w-40 simply means that the oil must fall within certain viscosity limits at 100°C. This is a fixed limit and all oils that end in 40 must achieve these limits. Once again the lower the number, the thinner the oil: 30 oil is thinner than 40 oil at 100°C etc. Your handbook will specify whether a 30, 40 or 50 etc. is required.
Do we need to change the engine oil, if the mileage is below 5K?
When asked, you may hear answers such as every 3000, 5000 or 7500 miles, or when the vehicle’s oil monitor indicates that this service is necessary. It is no wonder consumers are confused. The simplest answer… well, there is no simple answer! In fact, there is no interval that applies to most vehicles. The engine serves as the heart of your vehicle, so changing its oil based on the manufacturer’s recommendation is perhaps the single most important thing that you can do to keep your vehicle’s engine running longer. However, you must read these recommendations closely to determine the correct interval; the interval that matches your vehicle’s operating conditions and your driving habits. The Normal interval listed in the owner’s manual applies to vehicles driven under ideal conditions. Synthetic oils, such as the newly launched Bapco Charger Xtreem , are stretching oil change intervals, leaving the 3,000-km mark in the dust. The great majority of new vehicles today have a recommended oil change interval greater than 5,000 km. The company’s most advanced synthetic product (Bapco Charger Xtreem) is fit for 10,000 to 20,000 km. Today’s longer oil change intervals are due to: • Improved “robustness” of today’s oils, with their ability to protect engines from wear and heat and still deliver good fuel economy with low emissions • More automakers using synthetic oil • Tighter tolerances (the gap between metal moving parts) of modern engines Most of the carmakers are now shifting to oil life monitoring systems in their latest vehicles. The introduction of oil life monitoring systems, which notify the driver when an oil change is required, are based on the way the car is driven and the conditions it encounters. This will be a big relief to the car user worried about the oil change period While you may consider your driving habits and operating conditions quite normal, read the fine print. Some exceptions to Normal driving include: • Frequent short trips (less than 10 miles, especially during cold weather) • Stop-and-go city traffic driving • Driving in dusty conditions, on gravel roads, etc. • Driving at sustained highway speeds during hot weather • Towing use • Diesel or turbocharged engine • These conditions commonly appear in the description of severe service driving. • It is advised that you read your vehicle owner’s manual to locate the correct interval.