Drawing oil sample for analysis

[srfdude]

Its been pushing 100 for awhile and I'm too old to get under my car, so off to Valvoline for the change.
They allow me to bring my oil oil and filter and happily go on their way. I want to sample for analysis this time, and wonder if the length (within reason) of time from the time the engine was started or stopped changes the specifics of what might be in the oil? IOW can I send the tube down when the oil is been sitting overnight, or will it give a different result if I have the tech drop a sample into the jar when he changes it hot?

 

[fantastic]

Its been pushing 100 for awhile and I'm too old to get under my car, so off to Valvoline for the change.
They allow me to bring my oil oil and filter and happily go on their way. I want to sample for analysis this time, and wonder if the length (within reason) of time from the time the engine was started or stopped changes the specifics of what might be in the oil? IOW can I send the tube down when the oil is been sitting overnight, or will it give a different result if I have the tech drop a sample into the jar when he changes it hot?

Standard practice would be to rip the vehicle down the road for 15-30 minutes to burn off any moisture at the minimum before sampling. So, ideally, they would sample your oil while the oil is hot.

 

[srfdude]

Standard practice would be to rip the vehicle down the road for 15-30 minutes to burn off any moisture at the minimum before sampling. So, ideally, they would sample your oil while the oil is hot.

Ok, you've answered perfectly. I used an expletive in the original post for which I apologize.