I have a '03 FXDWG with approximately 18K miles. She just came out of Precision Motorcycle shop for repairs of my charging system and spokes. After they did a supposedly diagnostic, they said that I should do a tune up with oil change. They said the oil had milky like substance because the bike must be kept outside and moisture is coming in because of riding in the rain. This sounds very suspect. Anyhow, I recently did a oil change with 2800K into the change. The owner's manual states that i could ride atleast 5K before oil change is recommended. I didn't notice the milky like substance when I change the oil. I'm planning on changing the oil very soon since noticing this milky substance on the inside of the cap. Should I be concern that this milky like substance on the oil cap would affect the engine. If so, any suggestion on how to clean it out would highly be appreciated.

 

It doesn't take much water in the oil to produce a "milky" residue.

 

Ride it until it gets oil to FULL operating temperature, not just around the block or fire it up in the garage to here the pipes, and that milky like substance (condensation) will burn off!

 

Ride it around for at least a hundred miles on the Super Slab to get it up to temp. Voila! No more milky residue!

 

Thanks for the replies and suggestions. I ride her daily to and from work. I don't allow her to just cop a squat and collect dust. Just a waste of a hog. I was fearful that the shop did something to my bike when I denied their suggestions for the tune up. So if I'm understanding correctly, it's normal to have the milky like substances on the oil cap. The oil appears to be good. I'm planning on taking a five hour road trip next w/e. I was starting to get pissed thinking I could not take my bike.

 

Oil is cheap. Motors are not. Change the oil to be safe. I live by the code if I can't remember the last fluid change then it's getting new fluids.

Whens the last time you changed the fork oil?... Better change it.

Metal is porous, and things like condensation and rain get engines wet and that wet gets soaked in after riding and the cool down begins. Look at a grey engine block in the rain, they look darker. You can actually see wet spots.

 

How far is your workplace? If it's under twenty miles, you're not getting the motor up to full operating temperature to turn the moisture in the oil into steam where it can then be expelled through the breathers in the heads.

 

Welcome to the Internet ...where on earth did you get that one

 

You may want to make sure it is venting. Check Air cleaner for signs of the same white milk. Also check transmission and primary.
Others have given you good advise. take the bike out for a good long ride and do an oil change.

 

There's no need for an oil change. Just get out on it and get it good and hot. The moisture will evaporate from the oil.