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Here is some more info about Castrol's latest oil - LL04 - which is recommended for both diesel and petrol engines:
‘Clean Performance TechnologyTM’
Castrol, strategic partner of BMW, have developed a new lubricant with `Clean Performance TechnologyTM` in close cooperation with BMW, which sets new standards in the industry. Castrol SLX LL04 0W-30 is specially engineered to keep the engine and exhaust system clean, reducing harmful emissions to the environment. SLX LL04 is developed for the new generation of BMW’s with particulate filters and meets the latest specifications BMW Longlife-04. Due to its `Clean Performance TechnologyTM`, SLX LL04 reduces long term blocking of the particle filters and can be used in all BMW diesel and petrol engines (excluding M series). Castrol is the first lubricant manufacturer to bring a `Clean Performance TechnologyTM` oil onto the market.
BMW have started fitting diesel particulate filters (DPF’s) to their cars. Initially the BMW 5 series will be offered with a DPF, other models such as the new 3 series will follow. These new diesel engines fitted with a DPF need an engine oil based on new lubricant technology. Together with the engine management system the DPF ensures long-term reduction of particle emissions. In order to prolong the durability of the DPF the so called ‘Low SAPS’ oils are required. Castrol’s `Clean Performance TechnologyTM` is a totally new ‘Low SAPS’ formulation containing lower levels of Sulphated Ash, Phosphorous and Sulphur compared with conventional oils.
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