Can gasoline of the same grade but different brands be mixed?

[Rhett]

It is best not to mix gasoline of the same grade but different brands. Although Sinopec, PetroChina, and CNOOC are all reputable companies that produce genuine fuel with guaranteed quality, the crude oil sources differ. More details are as follows: 1. Sinopec primarily relies on imported crude oil, while PetroChina mainly uses domestically produced crude oil. Additionally, different companies use different additives during fuel production and refining. Therefore, it is advisable to avoid refueling at different brand gas stations and instead stick to one station consistently. 2. On the inner side of the vehicle's fuel tank cap and below the passenger seat on the B-pillar, there are manufacturer's labels indicating the recommended fuel grade. As long as you follow the manufacturer's suggested fuel grade, there should be no issues. 3. Generally, it is recommended to use 92-grade fuel for naturally aspirated engines, while 95-grade fuel is suggested for turbocharged engines. Higher fuel grades do not necessarily mean better combustion or stronger engine performance; it is essential to use the most suitable grade.