I have a 2024 ES350, I did an oil change with Mobil 1 ESP 5w-30 at 1,500 miles. I babied that car up to the oil change. After the oil change i started doing some full throttle runs. Shortly after at 2,500 miles the car has developed a piston slap sound (not to be confused with the injector ticking sound). It’s deep tok tok sound coming from deep inside the engine. I can hear it inside the cabin with windows closed through the vents. it sounds like something heavy in the engine is loose.
Now i’m not blaming the oil but just the disappointment of how quickly this piston slap developed. I don’t think this has anything to do with choice of oil, it’s even slightly thicker than the factory fill. i have talked to other toyota v6 owners and apparently piston slap has been a common issue with those engines but usually not until around 60-90k miles apparently. it’s rather unusual to develop this kind of noise this early on. The car will likely be fine and easily do 350k miles or more with no issues, but I just wanted to vent.
Now i’m not blaming the oil but just the disappointment of how quickly this piston slap developed. I don’t think this has anything to do with choice of oil, it’s even slightly thicker than the factory fill. i have talked to other toyota v6 owners and apparently piston slap has been a common issue with those engines but usually not until around 60-90k miles apparently. it’s rather unusual to develop this kind of noise this early on. The car will likely be fine and easily do 350k miles or more with no issues, but I just wanted to vent.