Most recently Subaru has brought in the CVT fluid which is much more commonly used currently and is very expensive, but comes with a lifetime service life. With the introduction of the 5AT Subaru went to the Transmax X which is premium automatic transmission fluid specifically designed for use in 5AT Subaru vehicles. One is the Dextron 3 mineral oil used in the 4AT. There are three kinds of Subaru auto transmission fluid in use currently. Synthetic oil is able to function dependably at the extreme pressures and temperatures of a jet engine and withstand extreme and lengthy engine operation without losing viscosity. Synthetic oils were developed for aircraft jet engines because they reduce friction and wear on engine parts. Synthetic oil consists of chemical compounds which are artificially made (synthesized) using chemically modified petroleum components rather than whole crude oil. With the advent of synthetic oils, many of the problems of mineral oils were solved. This type of oil has to be changed frequently. They also break down under pressure and temperature extremes. These oils serve their function well enough, to varying degrees, but get dirty very quickly, lose their viscosity quickly, and contribute to sludge build-up inside engines. Up until the 1980s oils were all petroleum products, made from the same crude oil from which your fuel is refined. While Subaru specify oil changes at intervals of 12,500 kilometres, ADS recommends more frequent changes especially with turbo models and city driving.
SUBARU FORESTER FORUM WHEN TO CHECK OIL MANUAL
It is critical to check the manual for the correct oil. All EJ turbo engines for standard application use the 5W30 synthetic. Most commonly the SOHC non-turbo engines use mineral 10W30 oil, and the new FA and FB engines use 0W20 synthetic oil. Broadly, there are two types of engine oil mineral and synthetic. If the oil does not do its job well, the results will be increased engine wear, lower performance, sludge and varnish accumulation inside the engine, and in extreme cases, engine failure. Oils serve two vital functions: lubrication and cooling. The different Subaru models and the different petrol and diesel engines have different recommended oils. Subaru Engine lubricating oil: two types of oil, many varieties
If you have any doubts about correct lubricants, and the manual can't assist, contact All Drive Subaroo or your local Subaru dealership. We recommend consulting the owner's manual for all lubricant specifications including levels, types, and specified service intervals. Trust only tried and tested products, like the Subaru branded line of fluids. They serve vital functions and if they fail, the results could be disastrous. That's true of all automotive coolants and lubricants. The petroleum industry and the auto industry are vast, and there are any number of shady operators offering cheaper products in an attempt to cash in. Although different brands oif oil may look the same, and may serve the same functions, quality can vary enormously.
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