You are here

Oil change idea - help?

Gentlemen, other blokes, ladies, etc.

A rare day off for me, so an oil/filter change is on the long 'to do' list.

The 'common wisdom' is to drain the oil after engine has reached operating temp, so that the oil is runny and drains easily. Fair enough.

HOWEVER, is there any merit in this idea? After draining into the sump for hours (overnight) is draining the cold, unturned engine going to actually let MORE oil out.

All thoughts, feedback, experience and smart-*rse comments are welcomed!

HKing - of verbosity/viscosity.

Topic: 
Engine: 
Section: 

Comments

My logic is as follows, A cold start situation apparently causes the most wear within an engine. If you drained the oil cold then the film of oil remaining within the engine will be both minimal and cold. This combined with a possible delay getting the new cold oil through the system would create a worst possible scenario for wear.
If the engine was warm then there would be a good coating of oil remaining in the engine, due to it recently running, and the oil in the pump will be warm and flow easily allowing it to pull the new oil through more quickly...

One thing I always do is partially fill the oil filter with fresh oil, this takes a while as the paper media in the filter takes a while to absorb the oil. It's amazing how much oil it will absorb and hold without spilling when you install the filter.

  • Like0
  • no like0
  • Holdenpaedia idea0
  • Funny0
  • Wrong Category0
Please use, Holdenpaedia will get the first box on the left side. Post any suggestions.

[http://gallery.oldho...|My EH Holden Shed]

 Email Me

Not being a scientist but being in possession of a certain amount of common sense, I believe hot oil drains better.

Reading into the viscosity of oils seems to indicate that cold oil needs to be forced through the engine on start up(dependant on oil rating)whereas hot oil travels easier.

  • Like0
  • no like0
  • Holdenpaedia idea0
  • Funny0
  • Wrong Category0
Please use, Holdenpaedia will get the first box on the left side. Post any suggestions.

Thanks fellas. The refill aspect/s make perfect sense, so I'm off to take the old bus for a warm-up run (and toast the new oil bottle in our balmy, sunny Ipswich morning weather). At last check air temp was up from -1C to +7C. Phew - I might hafta take some iced water out with me today!

HFrosty - of Rosewood.

  • Like0
  • no like0
  • Holdenpaedia idea0
  • Funny0
  • Wrong Category0
Please use, Holdenpaedia will get the first box on the left side. Post any suggestions.

'i'm definately shore that guage wont work with my tuff bango diff and Opal sydcrome box,if it goes though my grill,and I put the breaks on I realize its better with the glimer belt & tunned holly and Ederbrock duel feul webber gaurds, wiht etc primmer.'

....forget it. I have had my Stroker sitting on an engine stand for over a month with no sump on whilst I fark around getting the sump powder coated and the donk generally dressed up to make her look lovely and shiney. Still now, it drips oil. Not much, but my little plastic wrap always has a little pond of oil in it under the crank. I thought by now it would have stopped, but it seems endless.

Cheers,

Dom

  • Like0
  • no like0
  • Holdenpaedia idea0
  • Funny0
  • Wrong Category0
Please use, Holdenpaedia will get the first box on the left side. Post any suggestions.
  • Like0
  • no like0
  • Holdenpaedia idea0
  • Funny0
  • Wrong Category0
Please use, Holdenpaedia will get the first box on the left side. Post any suggestions.