Can 92 octane gasoline be used if only 93 octane or higher unleaded gasoline is recommended?
1 Answers
Only 93 octane or higher unleaded gasoline can be used, not 92 octane. Definition of unleaded gasoline: It refers to gasoline with a lead content below 0.013g/L, which does not have tetraethyl lead added as an anti-knock additive during the refining process, abbreviated as ULP (Un-Leaded Petro). Unleaded gasoline contains only trace amounts of lead from crude oil, generally one-hundredth of a gram per liter of gasoline. Its octane rating is 95, slightly lower than the octane rating (97) of other existing leaded gasoline grades. Function of unleaded gasoline: Using unleaded gasoline can effectively control harmful substances in vehicle exhaust, reducing pollution such as hydrocarbons (HC, which causes smog), carbon monoxide (CO, toxic), and nitrogen oxides (NOx, which forms acid rain). The most effective and simplest method to reduce emissions is to install a catalytic converter in the exhaust system. However, when the lead content in gasoline exceeds 0.013 grams per liter, the catalyst will become ineffective, failing to control vehicle exhaust emissions. This critical amount is the standard for defining unleaded gasoline. Vehicles using unleaded gasoline must have hardened valve seats in the engine that do not require lead lubrication. If not, after using several tanks of unleaded gasoline, a tank of leaded gasoline should be used to lubricate the valve seats.
