Watch running a bit slow

[sfrolex]

I started timing my watch to www.time.gov.

I started almost one week ago, actually 6 days and 12 hours ago.

For the first few days, perfect time, to the second.

Then over the last few days, it lost a little time. Now it's about 3 seconds slow. I'm wondering if my behavior wearing it factored in. Some nights I sleep with it, some nights do not. Some days I am more active, some days not, etc.

Is this normal? What's the typical time difference over a week or month?

I have the Sub Date

[Art161]

If it is running slow and you take it off at night, place it face up. Do not place it so it is in a vertical position; that would cause it to lose time compared to the face up position.

Most Rolexes should be accurate to about 2-3 seconds per day.

The accuracy does depend on your usage of the watch.

[Andad]

IMO, I doubt that you would improve the accuracy that you have, more likely you will chase the positions and not get very far.

[Z-Sub]

That is still extremely respectable variation from the referenced time.
The more active I am, the more variation I see.

[sfrolex]

Thanks for the info. I guess I should be happy.

[what3ver]

If I'm reading this right it's lost 3 seconds in a week? And you're complaining? I'd be happy, I've never had an automatic quite that accurate. My most accurate watch is a Speedmaster which gains about .75 seconds a day on average.

My LV loses about 4 seconds a day, it's power reserve is not what it should be either, it's going in soon.

[f16570]

No issues with this, this is amazing accuracy.