The components of our oils have been proportioned to reach an optimum result. Add an additive may create unnecessary blends and even harmful. Certain manufacturers even forbid to incorporate an additive in the oil.
The answer to this question depends on the technology used. Although some older vehicles allow the same lubricant to be used for both the engine and the gearbox, new vehicles require different products for each.
Follow the manufacturer’s recommendations.
Petrol and diesel engines have different lubrication requirements. During development, lubricants undergo a number of tests, some common to diesel and petrol engines and others specific to one or the other type, that categorize their performances. At the end of this process, they are awarded an API compliance standard. These specifications characterize the acceptable functioning of the lubricant in each type of petrol or diesel engine. Lubricants for four-stroke engines usually comply with both petrol and diesel specifications. For example, an API SJ/CF lubricant meets petrol specification SJ and diesel specification CF. But this does not necessarily mean that it will perform in the same way in both petrol and diesel engines.
Lubricants are always optimized to meet the requirements of international classifications. However, there are many ways of formulating a specific type of lubricant. Mixing two oils that have equivalent properties will not pose a problem, but final performance cannot be guaranteed. All market oils (petrol engine or diesel, mineral or synthetic) are mixable. However, a blending of two oil qualities lowers the superior quality.
No, because motorcycle four-stroke engines do not operate under the same conditions as those of cars (higher engine rpm and temperature). The engine lubricant can also be used to lubricate the gearbox and the clutch, which requires a formula with EXTREME-PRESSURE ADDITIVES. On the other hand, passenger vehicle lubricants contain DETERGENT ADDITIVES with a high ash content. In motorcycle engines, these cause deposits to form on the valve train and the piston crowns, which can result in valve burning or piston perforation.
During normal vehicle operation, oil is vital to ensures leak tightness between the combustion chamber and the crankcase. The oil pressure indicator shows how well this is being done.
An unusual drop in oil pressure can result from either lower engine oil viscosity due to dilution by fuel (injector problem or use at low load) ; too little oil in the lubrication system (due to an oil leak, excess oil consumption, or failure of the oil circulation pump) ; or even mechanical part wear.
The engine oil level should be checked regularly to prevent incidents. A small amount of the oil that circulates in the engine is always burnt (an engine in good condition consumes between 0.2 and 0.5 liters of oil every 1,000 kilometres), but successive top-ups are no substitute for an oil change.
Accordingly, it is natural that an engine consumes a small amount of oil, which can be offset by top-ups between oil changes; however, excessive need for top-ups can be an indication of mechanical problems (leaks, etc).
Any vehicle owner knows that lubricants are vital to the correct operation of your engine:
Product labels provide a considerable amount of information about lubricant performance.
A good quality oil provides motorists with a number of benefits:
Semi-synthetic and synthetic oils are made from non-conventional bases using sophisticated chemical processes which confer special properties to the finished product. First, the high level of viscosity of the base oils used gives the finished lubricant remarkably stable viscosity whatever the temperature. This property is one of its major advantages over mineral oils, made from conventional bases which require a greater number of additives in order to improve viscosity. The stability of lubrication in all temperatures guarantees optimum efficacy in the cold starting phase which is particularly demanding on the engine? as well as under conditions of extreme heat. Synthetic-based lubricants show greater resistance to oxidation, which gives them longer effective life thus guaranteeing longer engine life. The use of non-conventional bases, finally, permits the elaboration of more fluid lubricants, without being more volatile; resulting in a reduction of oil consumption.
Therefore, choosing a synthetic based oil is the technologically advance choice, for greater efficacy, longevity and controlled oil consumption.
A multigrade oil is one whose proper