P-30.01, r. 2 - Petroleum Products Regulation

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9. Type A automotive diesel fuel containing low levels of type A biodiesel is intended for use in selected applications, such as urban bus engines, engines used in underground mining or where ambient temperatures require better low-temperature properties than provided by type B diesel fuel.
Type B diesel fuel is used in diesel engines where the ambient temperature and storage conditions allow it.
O.C. 581-2015, s. 9.