Afternoon (for me) DTR...

I have a little question about when you should change oil, and this is in general, not just CTD related...

In days gone by, I would (if I had time) park my vehicles on ramps overnight so that all the oil would seep down and be as out of the internals of the motor as they could be, so that I would get the majority of the old oil out when I changed it. Fast forward a few years, someone tells me, or I read somewhere, that the oil should be at operating temp when you change it, and this is what I've been doing since.

So.... hot or cold? Why?


TIA...

mad

 

Honestly, I am in the middle

I let mine get up in temp but not all the way to normal temp. This way the oil is thinner and I feel it will drain better. After I pull the plug, I let it drain for quite a while while changing the filter, checking the air filter and just doing an overall inspection of the truck from front to back (underneath). Also putting grease in that darn little grease zerk in the front drive shaft!!!

 

It should be pretty warm, but not necessarily operating temp. When it's warm/hot it drains out better.

And you should also drain it soon after running the engine. All the particulates are still in suspension, and will drain out with the oil. Otherwise, they drop to the bottom of the pan and stay there.

 

hot it will flow like water dont worrie that all the oil is every where in the motor when its hot and flows like water it will all come out as if u let it sit all night

 

It should be at operating temp, then exactly what Bob stated is the reason.

Hot engine oil is also the best time to draw an oil sample, it will provide the most accurate assessment of the condition of your engine.

Tim

 

I do it hot as well. Seems to drain better that way.

 

Hot is the only way.. Cold 15W40 would take a long time to drain..

 

I've always done it warm to hott.. I prefer warm over hott because it always seems to make a mess when it is hott.. The oil comes out so fast it splatters..

 

I also subscibe to the warm, and just shut off theory. As stated above oil drains out faster, and whatever soot or contamination should be still in suspension.

 

Hot. Gets all the nasties stirred up so they drain out with the oil - plus it drains faster.

 

warm, then let it drain for about 20/30 min while i do everything else.

darn things still dripping after 30 mins

 

Hot for me for last 35 years of changing the earl

 

Perfectly said!!!! XXX222

 

Hot - drains faster & gets all the particles and contaminants out