Hi all. I had my oil changed a couple weeks ago. 2003 Ford Mustang Mach 1. A day or two later, I started noticing a lot of smoke coming out of the exhaust at times and it smelled like something was being burned. Checked the dipstick, it was at the full mark. I was getting pretty worried that there was an internal issue. Then I found out at the Mach 1 Registry that the dipsticks in these cars (at least in '03 models) are wrong! Full on the dipstick means you’re overfilled. Nice quality control at Ford!
I changed it again, this time myself. Drained everything out, put back in 6 quarts of Motorcraft blend 5W-20 as the manual calls for. Now it reads a little over 2/3 to the full mark on the dipstick. Smoke and smell in the exhaust stopped immediately. The car runs awesome.
My question is, did I cause any damage to my engine? There are only 28k miles on it. I drove it for about 150 miles or so, maybe 200. Even pretty hard several times, before I noticed the exhaust smoke. Not only was it driven hard a few times for a few seconds, but the car has been aftermarket supercharged (Procharger). So a lot more power output than it came from the factory. (about 520 HP at the crank vs the original 305 HP)
I’ve seen no more smoke at all, and haven’t noticed any oil drips on the garage floor. I just worry that there might now be some hidden issue that may rear it’s head later. Thanks!