So just how much do you value the engine in your car? This is a serious question as your engine's life depends in no small part on the quality of the oil you put in it. In fact oil is the lifeblood of your car's engine, as vital to it as your blood is to you.
A bit of History
The 80's saw a revolution in car engine oil, the event of the 'hot hatch' with their 16-valve engines and turbos requiring a different type of oil to the 'family car'. Even the less tuned cars on the roads started to require different types of oil, 'Black Death', the sludge which claimed many cars being caused by using the wrong oil or maintenance schedule.
So how do you chose the best motor oil to use in your car's engine? This is something that is made even more difficult as the days of one oil catering for everyone were over, the rate of development also adding to the confusion.
Exol's Range of Automotive Engine Oils are designed to meet the very highest specifications.
As the point of engine oil is primarily to stop all the metal surfaces from grinding together, tearing themselves apart in the process, you can see that it performs a pretty vital role.
However, oil does more than reduce friction, it also transfers heat, heat which is produced by the combustion cycle. Here the oil works alongside the engines cooling system (itself using antifreeze) to ensure that your engine does not exceed its operating temperature.
Engine oil must also be able to absorb and hold on to all those nasty by-products that are produced by the act of combustion, such as silica (silicon oxide) and hold any acids in suspension.
Beside cleaning the engine of these chemicals, it keeps the moving parts coated in oil, also minimising the engines exposure to oxygen and thus oxidation at higher temperatures.
Mineral oils are based on oil that comes from wells (which has then been refined) while Synthetic oils are entirely formulated by chemists. The other type is semi-synthetic, sometimes called premium oil, which is a blend of the two.
Despite their name, many synthetic derived motor oils actually are derived from mineral oils (they use the Polyalphaolifins from the gas produced by the mineral oil refraction process).
These ' PAO' oils will mix with normal mineral oils which means that you can add synthetic to mineral, or mineral to synthetic without damaging the engine.
Pure synthetics - Best for Industrial Applications
Pure synthetic oils, aka (polyalkyleneglycol) is the variant used almost exclusively within the industrial sector in 'polyglycol' gearbox oils as they will take the loads produced in heavily loaded gearboxes.
However, these Polyglycols oils don't mix with normal mineral oils, so as ever it is best to always ask the experts, exols experts being there to help you.