Hi all,
I am an AMG GLE 53 owner in Beijing, China. I would like to ask everyone how much impact the oil quality has on the handling of the vehicle?
Here's the thing, it might be a bit complicated for me to judge. A few mornings ago, I filled up half a tank of Chinese standard 98 gasoline at a gasoline station (the corresponding American standard may be 93. I usually fill up the oil when it is half capacity), and then went to a car refitting factory to install the hot and cold cup holders of the car. It took more than 5 hours to disassemble and assemble. During the dismantling process, I saw that the engineer removed the engine cover pull ring, and finally made some modifications with the computer by linking the car.
The problem started after that, when I started the car, I found that the acceleration was a bit slow and it felt "heavy". When I started it again the next day and drove to the highway and accelerated at a speed of 40-50 mph, I found that the previous pushing back feeling was gone. The sound of the engine sound wave is relatively dull, and the sound wave when the speed is accelerated rapidly does not have the intermittent popping sound that was common before.
I went to the after-sales repair shop of Mercedes-Benz, and the engineer also found the same problem during the test drive, but he didn't know the reason, and the link to the computer showed that everything was normal. I had to drive the car back. After tossing and tossing for a long time, the car has used half a tank of oil. I went to another gasoline station to fill up the same type of oil. A miracle happened, the car seemed to be back to normal.
What I want to ask everyone is, does the quality of oil really have such a big impact on vehicle handling? Is there anything else I need to do next? (such as oil circuit cleaning)
Thx

 

I think your use of the term "oil" would be more easily understood by Western readers by using the word 'fuel' or 'gasoline.'

Yes, a low octane fuel, perhaps lower than 95 (or ~89 in US ratings) will cause the engine to reduce power to prevent internal damage.

There are knock sensors at each cylinder that will detect pre-ignition, and change the engine mapping to reduce power.

I often see this on loaner cars, when I put the correct fuel after previous drivers probably put the cheapest fuel possible. I do this because I'd like to experience the car as it was meant to be (and it's the right thing to do), and it's often very noticeable. I'll do this when the tank drops below 1/2, and there's an immediate improvement.

I wonder if your fuel station dispensed the wrong grade.
But I'd also wonder if the technician under the engine cover might have changed the engine mapping, causing the issue.

 

Thank you for your reply. I checked my receipt and it was #98 oil. It seems to me that I need to choose the oil station carefully. Here, many oil stations are cooperatively operated, and some people report that these stations will mix substandard oil to the oil depot without permission. In addition, I will also make an appointment with the car after-sales service provider and ask them to check the engine driver of the car. Thanks again!