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Pure synthetic engine oil
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Pure synthetic engine oils, despite their name, are actually derived from mineral oils. They are made from the purest part of the mineral oil refraction process, the gas. These oils do not contain impurities usually found in other oils, which gives them longer change schedules and improves their overall performance. They are also highly viscous and can perform better at extreme temperatures. Synthetic oils can almost be termed as custom-built oils; they're designed to do the job efficiently but without any of the problems associated with mineral oils.
The advantages of pure synthetic oils are as follows:
• They have better low and high temperature viscosity performance
• They have better chemical stability
• They are more resistive to oxidation, thermal breakdown, and oil sludge problems
• They have longer change schedule, so less oil is wasted
• These oils extend an engine’s life compared to other types of oils
• Synthetic oils are known to increase the horsepower and torque of engine as they reduce the drag on the engine
The disadvantages of pure synthetic motor oils include:
• The initial cost of these oils is very high
• Chemicals in synthetic oils have been known to corrode rubber seals in carburetted engines
• Many synthetic oils do not give an engine any major advantage, as far as performance is concerned, over mineral or semi-synthetic oil. Performance enhancements will be limited to high performance engines
Prices of pure-synthetic engine oils start from Rs 2,700 (onwards) for a three litre oil can.