View Full Version : When should I change out my HT oil?

03-24-2011, 06:10 PM
Hey guys,
I'm sure this question has been asked before (in fact, I've asked it a few times myself), but I'm not sure if I've ever really received an answer...

First, I'd like to ask specifically for Parks 50 oil. When should I change out to fresh oil? Are there tell tale signs that it's not good to use anymore? Does the oil last forever? Is it based on opacity? Viscosity? etc...?

I'd also be curious about cheaper oils like Veg. or Peanut oil and such...

When do you guys recommend "freshening" the quench tank?

Thanks for the insight!

03-25-2011, 02:36 PM
I haven't changed my Parks' yet, but I change my peanut oil when it won't get to 400 F anymore. (I marquench my A2 in it.) (Don't ask...it's a habit I picked up a few years back.)

03-26-2011, 08:32 AM
great 1 i was wandering the same thing