Need Help?

2007 Mercury Milan Base 4dr Sedan I4 FWD

2007 Mercury Milan
Trim Info:
Front Wheel Drive, 4 Door Sedan, Mid-Size
23 mpg city / 31 mpg hwy
Other Trims
Do you own this car?
Estimated Mileage
Enter current mileage for most
accurate info about this vehicle

Track Your Service Records
Get Recall Alerts
Get Updated Value Estimates on Your Car.

back to question list

Ask the Community

Ask Our Auto Mechanics

June 4, 2012, 8:51 pm

Matt C

Question: oil light comes on at idle

This happens after complete warm up and seems to be while the a/c is running. Could it be heat from engine fan causing oil pressure switch to fail?

June 9, 2012, 2:05 am

Tyler O

Usually it's best to replace the switch and see if the lamp comes back on. It sounds like you may have an oil pressure issue. With the engine hot at idle, the oil pressure is lowest. With the AC on you are increasing the load and the under hood temperatures, causing the oil to get thinner. If the pumps worn it wont be able to produce enough oil pressure with these conditions.

First try an oil change with a one step thicker oil. If you still have pressure problems you'll need to replace the oil pump

0/0 users found this helpful.

Ask our panel of certified auto mechanics a question. We pay for their advice so you don't have to

My Auto Score

See the free AutoCheck score

Meet The Experts
Kim Perrin
Kim Perrin is our resident mechanic here at DriverSide. Kim worked as…
Tyler Orr
Tyler Orr is an expert in German and Japanese cars and has been a mechanic …
Elizabeth Kriesten
Elizabeth Kriesten worked as an automotive technician for several years at Dodge…
Tips on Servicing

Car Brakes: How Do You Know When to Change Them?

By Zach Bowman For those who suffer a daily commute through heavy traffic, your vehicle's braking system can bring thousands of pounds of metal, plastic and empty Starbucks cups to a stop hundreds of times before you get to work. It goes without saying that these pieces wear out, but they do so slowly, meaning you may not notice they need attention until ...

Read more…