The phone ringing is, technically speaking, a notification sound, and uses the same volume setting as all other notifications (called Ringer Volume).

As far as notification tone length, you would need to contact the app's developer. You cannot set custom tones (at least, outside the app) for 3rd-party iOS apps like you can with Phone, Messages, etc.

Make app notifications ring as loudly as the phone
Aside from the traditional maintenance of oil changes, and keeping fluid levels correct - what else will help prolong the engine's life?

I recall a few years back gasoline additives were the thing to go with - what's the best/recommended one currently? If any.

Edit: I recall reading about each gasoline brand having their own set of additives at one point, where it was suggested to cycle between a few different brands every X amount of km/miles. The reason behind switching was so that the next brand would cleanup any sediments left by the previous brand. How likely is this in today's world? And better yet, how important is it?
