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.
I'm on my third Hyundai with 68,000 on this one. The first, an '88 Excel the engine went at @ 130,000 miles. The second, a ;94 Excel I traded in at 140,000 miles. the seals were starting to go otherwise the car was in good shape.Draw your own conclusions.eport Abuse. an engine over 100K miles could go another 100K without any problems or could need some work soon, if you are concerned you could have a shop do a compression test, though that will just tell you that the engine is in good condition today not in 50K miles.