After I got my V6 Tacoma with 40k miles on it I noticed the oil looking strange as in the picture. I changed the oil (Castrol 5W30) after 5k miles and now have driven it 7k miles total, 2k miles on this oil change. Then I got gas on a rag and rubbed the dipstick hard for 90 seconds trying to remove any film. Then I sanded the dipstick with fine sandpaper for 30 seconds and then I took this picture.
This is how the oil looks on the dipstick after the truck has been sitting for several days. After driving it for 20 minutes the oil is more evenly spread across the dipstick, but still leaves blank spaces. If it did this inside the engine, leaving metal on metal, it would be serious.
Any idea why it is doing this and if it is a bad sign or one not to worry about. My next step is a Blackstone analysis.