Simple oil test with business card

[treehan77]

Something i saw on another forum. Can give you a quick idea of whether or not your oil has lots of soot etc. Use only in addition to regular maintenance etc.

http://www.machinerylubrication.com/Read/348/check-car-oil

 

[ezdaar]

very cool.

 

[TheAutumnWind]

I'm going to try this on my Jeep. It has Pennzoil Platinum in it and a 15k filter and its been about 5k miles since the oil change.