之前有study about柴油的十六烷: 值低於工作條件要求,會使燃燒延遲和不完全,以致發生爆震,降低發動機功率,增加柴油消耗量。 但十六烷值過高,也會使燃燒不完全而發生冒煙現象,並增加柴油消耗量。高速柴油機燃料的十六烷值約為40-56。大多數的柴油機可採用的十六烷值40-45。加入少量的添加劑(如硝酸戊酯),可提高柴油的十六烷值。 而BMW的官方說法是: BMW recommends diesel fuel with 51 cetane rating or higher, no additives of any kind, and no more than 5% biodiesel (B5) in it.
而美國的柴油十六烷值 大部分也是在40-47之間47以上的算比較少 BP (Amoco branded), 51; Countrymark fuels Diesel-R, 50 Chevron, 49; or 51 with Techron D labels in select markets ConocoPhillips through the 76 stations (California) 47-53 PetroCanada, 47-51 BP (Powerblend 47, otherwise 40-42) Shell, 46; Sinclair, 46; Sunoco Gold, 45 (often +1-5) Sunoco regular is usually 40. Exxon/Mobile, 43-46 Holiday Stations, 40-43 HESS, 40-42, can be up to 45. Husky, 40 + diesel Max additives raise another 1-3 from there (41-45 max) Love's: 40 Pilot: 40 Valero: 40 Sheetz: 40 Flying J, 40 根據老美的說法,柴油引擎的相容性蠻高,因此加40-47都還ok