All C.I.M Lubri Fuel Engine oils contain additives that improve the performance of the engine oil. These additives, amongst other important ingredients, contain detergents and dispersants. Detergents are an extremely important part of the engine oil and are incorporated into the oil blend to keep the internals of your engine clean, whilst dispersants are added to suspend the contaminants that are too fine for the filter to capture and these are then flushed away during an oil change.
Modern day engine oils require carefully selected additives to perform these tasks and not become saturated during the extended oil drain interval. Late specifications such as API SN, SN+, SP and ACEA A3/B4, A5/B5 grade oils provide the highest levels of detergency to keep engines cleaner for longer. This stops the build-up of sludge; piston deposits and reduces wear significantly over their previous grades. Penrite oils are specifically developed to keep cleaning and looking after your engine for the entire service period. To keep your engine clean, you should change your oil and oil filter regularly.
Full synthetic base oils have a more uniform structure (meaning their molecules are nearly all the same size) which reduces friction and improves oil flow for better lubricity. They are less prone to oxidation (Break Down) at high temperatures which means they can provide superior protection to mineral and semi synthetic oils during extreme operating conditions. This also gives them an extended life over mineral and semi synthetic oils.
Full synthetic oils are extremely pure, so are not as likely to be affected by impurities that may be found in some lower grade base oils, such as phosphorus, sulphur and wax. These impurities can impede low temperature pumpability and increase oxidation rates of the base oil. This makes synthetic base oils more suitable for lower viscosity engine oils.
Synthetic oils also have better heat shear stability meaning they are more likely to stay in grade over a longer period which provides longer lasting protection against viscosity loss contributing to increased wear and oil consumption at operating temperature.
Heavy Duty Engine oils are blended with higher concentrations of detergency and anti-wear agents than light duty oils.
They also use a different chemistry in other areas. They generally have a higher TBN (Total Base Number) due to the higher detergency and higher phosphorus and sulphated ash levels to equivalent PCMOs.
Heavy duty oils are generally designated with an industry specification that is different to light duty oils i.e., ACEA E grade oils.
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