Frequently Asked Questions
FAQ
If the engine cranks normal and the spark plugs are not worn or dirty, the choke probably needs to be repaired or adjusted. Slow cranking during cold weather (below freezing) can also be caused by oil that is too thick. A high viscosity oil such as straight 30 or 40 weight oil in the crankcase can make an engine very difficult to crank when the temperature drops. Switching to lighter multi-viscosity oil such as 10W-30 or 10W-40 should solve this problem.
A non-detergent oil would stay clearer than a detergent oil because all the soot would be left on the internal engine parts and would create sludge. If you never changed your oil, eventually the oil would no longer be able to suspend any more particles in the oil and sludge would form. Fortunately, by following the manufacturer's recommended oil change interval, you are changing your oil long before the oil has become saturated. Remember, a good oil should get dirty as it does its work cleaning out the engine.
Oil oxidation, the most predominant reaction of a lubricant is responsible for numerous lubricant problems; including viscosity increase (thickening), varnish, sludge and sediment formation, additive depletion, base oil breakdown, loss in foam control, rust formation, acid number increase and corrosion. Therefore, understanding and controlling oxidation is a major priority. Every lubricant is designed with an oxidation controlling method. The formulation of each lubricant, therefore, contains antioxidant additives.
The flash point is the lowest temperature at which a vapor above a liquid will ignite when a flame is applied under standard conditions In lubricant flash points well in excess of 210°c (min) are normal, because the normal gasoline engine operating temperature is approximately 100-160°c. Therefore the BOSCHER Engine Oil is usually 20-30% higher than flash point for avoiding vaporized.
Viscosity index (VI) is an arbitrary measure for the change of viscosity with variations in temperature. The viscosity of liquid decreases as temperature increases. The viscosity of a lubricant is closely related to its stability to reduce friction, therefore if it is too thin in high temperature, the surfaces will come in contract and friction will increase to damage components. Higher quality base oils are widely used nowadays which increase the VIs attainable beyond the value of 100. In the case of BOSCHER ENGINE OIL the Viscosity Index has increased the ranges from 140-180.
Wear and tear in machineries are caused by corrosion, formation of sludge in oil containing metal, solid particulates and effluents which causes friction and abrasion in machinery moving parts. To minimize the wear and tear, additives with chemical compounds (Polar additives) are added to lubricating oil. The beneficial properties inherent in the lubricating oil with these unique additives are that it reduces the friction, corrosion and abrasion. Polar additives form durable low resistance lubricant films via absorption on surfaces and via association with the oil.