Can a little transmission fluid hurt the engine?

1999 CADILLAC DEVILLE
122,000 MILES • V8 • FWD • AUTOMATIC
Avatar
MARKVELLUTATO
  • MEMBER
  • 43 POSTS
I just did the most stupid thing to my 1999 Cadillac Deville. I went to add a quart of oil and didn't realize it, but it was a quart of transmission fluid. When I went to pour it into the oil fill, I saw the red fluid and immediately stopped. I would say less than an ounce went into the engine. Can this cause any damage to my engine and do I need to get the oil changed ASAP? I'm due for an oil change in 500 miles.
Mar 9, 2012 at 6:01 PM
Advertisement
Avatar
CARADIODOC
  • ✓ASE Certified Mechanic
  • 34,321 POSTS
  • ASE Certified Mechanic
AHHH! Bail out! Actually, many people add the entire quart of transmission fluid to the engine oil a day or two before having the oil changed. Because of different types of additives in the transmission fluid, it does a REAL nice job of dissolving sludge and carrying it to the filter. You haven't hurt anything by adding just a taste.
Mar 9, 2012 at 6:20 PM
Avatar
CADIEMAN
  • ✓ASE Certified Mechanic
  • 3,544 POSTS
  • ASE Certified Mechanic
this will only clean the motor.i agree
Mar 10, 2012 at 12:57 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.