[Mule bender]

Went to check the oil and found this mess. This is the 2nd dipstick on this 2016 Mule. They rust like crazy, 510 hours on the mule.

 

[Mule bender]

The dipstick broke off in the tube. I have the original and will install it.

 

[NMKAWIERIDER]

That's Fed-up. The only times I ever see stuff like that...and it has never been that bad...is when there is a lot of extra moisture in the crankcase from a water jacket leak or on engines that are not run long enough to burn-off the condensation that develops inside the crankcase when first started. I also see this when an electrolysis action happens between two materials. Are you sure the grounding is correct between the block and chassis and there is nothing attached to or associated with the dip stick tube...like an oil heater? Its not going down and touching a plug heater is it?

 

[Mule bender]

It is result of inadequate crankcase venting. The engine is overdue for an oil change which I will be doing in the next couple days. I may modify the dipstick as the design of it being over three feet long allows moisture to accumulate in the horizontal position across the engine compartment.There may be some vent hoses clogged somewhere also. The engine runs fine, no smoke. I try to keep the engine wound up as much as possible. It is a 2 cyl. and the mule is a 2016 4010. I will post my findings later.