Can I add PetroChina oil after adding Sinopec oil?

[LaLiam]

You can switch to PetroChina oil after using Sinopec oil, as long as the gasoline meets national standards. Below are specific comparisons between PetroChina and Sinopec: 1. Raw materials: Although PetroChina and Sinopec use almost the same processes, their additives differ. Sinopec uses some of the best imported additives available globally. 2. Density: In terms of oil density, PetroChina's gasoline density is generally around 0.72–0.73, while Sinopec's oil density is around 0.75–0.77. The quality of both oils is similar, but PetroChina's oil density is slightly lower than Sinopec's. 3. Mileage: Since PetroChina's density is lower than Sinopec's, Sinopec's fuel tends to be more durable and powerful, and it is usually slightly more expensive. However, due to differences in crude oil sources, gasoline processing methods, procedures, and additive usage between the two brands, frequent mixing may lead to minor engine issues such as slight shaking and carbon buildup.

[EstherFitz]

I often tinker with my car myself and enjoy browsing car forums. Mixing gas from different brands is indeed feasible. If you switch from Sinopec's 92# gasoline to PetroChina's 92#, your engine won't have any issues because domestic gasoline is produced according to national standards, with essentially the same basic components. The power and fuel consumption are pretty similar when driving. I've also tried mixing them a few times during long trips, and the fuel quality of Sinopec and PetroChina is almost the same standard specification. Although there are slight differences in additives, it doesn't affect daily driving. However, it's worth noting that if your car is newly purchased or turbocharged, the manufacturer's manual may recommend sticking to one gasoline brand to prevent minor residue buildup from affecting engine longevity. In short, occasional mixing is fine, but sticking to one brand is more hassle-free. For example, I've always preferred Sinopec—the more I use it, the smoother my car runs.

[LaChristian]

I've been driving family sedans for over a decade, and my current car is a second-hand purchase. My refueling habit is simply going to whichever station is nearest. There's absolutely no problem switching from Sinopec to PetroChina's 95# gasoline - as long as the octane rating matches, the engine starts smoothly and fuel consumption remains unchanged. I remember once running out of gas on the highway and topping up with PetroChina's 92#, the car kept running without any hesitation. My friends all say this is no big deal and not worth overthinking. Gasoline quality meets standards, just check that the octane ratings match, like 95# with 95#, and don't mix them randomly. Personally, I find mixing gas stations saves money and is convenient, especially when taking advantage of price fluctuations - never had any issues. After all, a car is meant to be driven, not kept as some precious collectible.

[MayaAnn]

I've owned my car for about two years and am quite casual about refueling. It's perfectly fine to switch from Sinopec gasoline to PetroChina next time, as long as the octane rating is the same, such as 95# or 92#. Last month, I mixed fuels like this once, and the car ran with strong power and steady engine sound without any noticeable issues. The differences between gasoline brands are negligible, and it can even be slightly cheaper. When I see PetroChina is cheaper on the road, I just fill up there. A friend who drives an older car also says mixing fuels is a common practice, nothing to make a fuss about or get stressed over.

[MacConnor]

With over twenty years of driving experience, I can tell you that mixing fuels is quite common. Adding Sinopec fuel after filling up with PetroChina won't harm your car, as long as the octane ratings match, like 92# with 92#. When I was younger and drove trucks on long-haul routes, I mixed fuels from various brands, and the engines still ran reliably. However, modern car engines are designed with greater precision, and frequent mixing of different gasoline brands may slightly affect performance due to additive residues. That's why I recommend sticking to one brand for daily use to maintain engine health. Don't worry about short-term mixing causing issues, but safe driving still relies on regular fuel quality checks.

[MacCarlos]

I'm quite meticulous about car maintenance. While mixing gas from different brands is theoretically possible, it's important to be aware of the risks. When Sinopec and PetroChina gasoline have the same octane rating, occasional mixing is acceptable—for example, 92# with 92#—and the engine generally runs normally. However, different brands use varying additive formulations, which may lead to uneven ignition or reduced power after mixing, especially in vehicles with direct injection systems, as they are more sensitive. My own SUV is turbocharged, and the manufacturer's manual emphasizes sticking to a single brand for refueling, so I avoid mixing whenever possible. Safety comes first when driving, so I prefer to consistently use either Sinopec or PetroChina to ensure fuel purity and minimize impurities.