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Shell Rotella T is a line of heavy duty engine lubrication products produced by Shell Oil Company. The line includes engine oils, gear oils and coolants. The oil carries both the American Petroleum Institute (API) diesel "C" rating as well as the API gasoline engine "S" rating. Ratings differ based on the oil. Rotella oils like T3 15w-40 meets both the API CJ-4 and SM specifications, and may be used in both gasoline and diesel engines. However, it is formulated specifically for vehicles without catalytic converters, containing phosphorus levels beyond the 600-800ppm range.〔http://www.pqiamerica.com/May%202013/rotella.htm〕 Therefore, Rotella is not recommended for gasoline vehicles with catalytic converters due to the higher risk of damaging these emission controls.〔http://i.imgur.com/SwGI23M.png〕 Newer formulations of Rotella T6 however are API SM rated as safe for pre-2011 gasoline vehicles. ==Product lineup== The Rotella product family is categorized by Shell into the following product families: * Engine oils * Coolants * Tractor fluid (a universal transmission, gear, hydraulic, and wet brake fluid) * Gear oil In the engine oil family, there are four basic oil sub-families: * Multigrade conventional oil—in SAE 10W-30 and 15W-40 viscosity ranges * Multigrade synthetic oil—in SAE 5W-40 * Single grade conventional oil—in SAE 20, 30, 40 and 50 * Synthetic blend oil Both the multigrade conventional oil (10W-30 and 15W-40) and the synthetic SAE 5W-40 meet the newest API certification of CJ-4/SM. Shell is marketing their new CJ-4/SM oil as "Triple Protection," meaning it provides enhanced qualities for engine wear, soot control and engine cleanliness. Shell's Rotella website indicates that on-road testing confirms the new Triple Protection technology produces better anti-wear characteristics than their existing CI-4+ rated Rotella oil. This is achieved despite a lower zinc and phosphorus additive level as called for by the API CJ-4 specification. (The 15W-40 Rotella T with Triple Protection oil has approximately 1200 ppm of zinc and 1100 ppm phosphorus at the time of manufacture.) The Shell Rimula brand is multi-national and comparable in all aspects, including the classification names. (i.e. T-5, T-6, Etc.) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Shell Rotella T」の詳細全文を読む スポンサード リンク
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