How much 92 gasoline left before adding 95 gasoline?
2 Answers
You can add 95 gasoline when there is less than a quarter of 92 gasoline left, but it is not recommended to mix them because the two have different components and corresponding vehicle requirements. Gasoline is a volatile, flammable hydrocarbon mixture liquid obtained from petroleum through distillation, cracking, or pyrolysis, mainly used as fuel for spark-ignited internal combustion engines. It primarily includes organic compounds obtained from crude oil distillation and various additives. The octane number of gasoline can be used to measure the anti-knock properties of a specific gasoline mixture (which can cause knocking and reduce the efficiency of reciprocating engines). Based on different octane numbers, gasoline can be produced in several grades.
How much 92-octane gasoline should be left before switching to 95? Personally, I think it's fine to switch when the tank is nearly empty. For example, when the fuel light comes on while driving, indicating you have about 1/10 of the tank left—roughly 5 liters—I just go ahead and fill up with 95. Modern car engines are quite smart and can handle small amounts of mixed fuel without immediate issues. I remember one time when I had a bit of 92 left in my tank and added 95; it ran smoothly with no unusual noises. However, don’t make a habit of mixing fuels, as the octane ratings differ—92 is lower, 95 is higher. Frequent mixing could cause knocking, where the engine vibrates heavily and makes a knocking sound, which can damage it. When refueling, check your tank capacity—for a 40-liter car, switching to 95 when there’s less than 4 liters left is safe. Also, regularly monitor your fuel level; don’t wait until it’s bone dry to refuel, as that can harm the fuel pump.
