I recently purchased a Blazer with a 396 that was bored 60 over. Haven’t driven it longer than 30 minutes at a pop. Recently changed oil and after a few days the oil pressure went from around 50-55psi while driving to 60 at idle and about 70-75 while driving. Ran some seafoam through did another oil change and it’s at the same psi. What are my next steps. Any help would be appreciated

 

Not sure why you decided this was the best place to post. Read the instructions on your screen please. Moving your post to Blazers ....

 

Welcome from Florida. Check your oil pressure with a mechanical gauge to make sure you are getting an accurate reading.