i recently just got a 1988 lx hatchback with 125,000 miles on it and it has never had synthetic oil would it be bad when i do my oil change/tuneup to use synthetic or just keep using regular oil

 

This depends on how hard the engine's life has been. There are likely some passages around gaskets which are currently sealed off by gunk and dino oil; synthetic oil will clean this gunk and find its way outside of your engine. Long-story-short, you may develop an oil drip on synthetic. However, my last 302 had 100k miles on it and no drips once I converted to full synthetic, while it provided better gas mileage and supposedly more protection for the engine.

 

Convert to synthetic and don't look back...unless your engine is using oil now.