Since the 1950s, the popular calculation of how old a dog was âin human yearsâ has been that 1 dog year is the equivalent of 7 human ones. Even though this formula has been around for a surprisingly long time, the reality is not so cut-and-dried. That doesnât stop many people from defaulting to this traditional calculation.
Oil Changes. I have a 2006 Hyundai Sonata with 56,000 miles on it. The owners manual says to change the oil every 7500 miles. The place I take the car to for the oil change says every 3000 miles. Friends of mine say every 3000 miles because it is mainly driven in the city.
The instant oil change places say you need to change 3 months or 3,000 miles, and that's not a bad idea, but you can stretch it. The State of Michigan does oil changes on its fleet cars every 5,000 miles. Many manufacturers say to change the oil every 7,500 miles.