Rust on dipstick

Tiny
KEBROWN12
  • MEMBER
  • 2014 HONDA ACCORD
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 15,000 MILES
I found rust on the upper half of the dipstick, what could be the cause?
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Sunday, July 9th, 2017 AT 4:19 PM

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Tiny
CJ MEDEVAC
  • EXPERT
Maybe the PCV system has a problem and is not sucking the crankcase gases out?

A lot of times if there is moisture in the crankcase, you will notice a snot-like creamy substance on the bottom side of your oil fill cap.

The Medic
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Sunday, July 9th, 2017 AT 6:46 PM
Tiny
STEVE W.
  • EXPERT
If the car is a 2014 and that mileage is correct I would say the issue is from lack of use. Setting is one of the worst things for a vehicle and can cause rust in places that normally won't rust. Take the dip stick for instance. During normal use the engine gets warm and inside is like an oil mist sauna. That coats the various parts and prevents rust. However if the vehicle sets a lot you will see the oil drain back off of the parts, then during temperature cycles and engine cooling air and moisture move in/out of the engine. That nice clean bare steel dipstick is like a bee to honey to rust.

Also, if you don't drive it very often the various combustion by-products collect inside the engine and create some mildly acidic compounds, Those normally would all boil out of the oil and be removed through the PCV system once the engine was up to operating temperature. But they also mist around in the engine and create havoc as well. That is one of the reasons why you should actually change the oil in a vehicle more often if it only drives short trips or low miles throughout the years, it removes those acidic compounds.
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Monday, July 10th, 2017 AT 3:27 PM

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