That chronological duration is more of an estimate based on how much the “average” car may be driven and is just to give someone an idea of the frequency.
The standard for cars built for synthetic (“conventional” cars may have a bit more susceptibility to contamination, so they normally have shorter durations) usually usually go for 10-15k miles (~16-24k km). So going 30-45k miles in a year isn’t really unheard of. (Some cars are much less, while others like company cars/taxis can be more than double)
HelixDab2@lemm.ee 3 weeks ago
Depends on how much you drive, and what the recommended interval is. If the interval is 7k miles, and you drive 18k in a year, yeah, you need to change the oil 3x/year.
It seems to me that counting the number of cycles each makes, and basing your intervals off that would make more sense than mileage. If I’m constantly running at high RPM, that should require more frequent oil changes in terms of mileage.