Previously reminders could be set by distance, time or both. Trying to set reminders for oil changes, I'm not able to see on the ios app or web site an option for setting distance, only time.
Any reason why you cannot do distance/time or both with trip reading? For example, I just got a new car and the the oil change is recommended at 5K or 6 months. I'm using trip reading so when I get to 5K I will not have a reminder until I get to 6 months, at which time I'll be closer to 6K or 7K.
The reason that reminders by distance are not available when tracking by Trip Distance is since no odometer readings are entered when tracking by Trip Distance. It may be possible to add the trips together, it would be possible, but Missed Fuelups would make it very inaccurate.