I have a Toyota 4Runner with the 4.0L V6. The dipstick is entirely useless. No matter when I pull it out - even after sitting all night - I get no reading other than random smears of oil up and down the dipstick. If I didn't change my own oil, this would drive me even more crazy. At least I know my oil level should be correct when it gets changed. If I had someone else do the changes, I would never know whether the correct amount of oil was used. Is there anything that can be done about this? I have seen this mentioned by others on a 4Runner forum, so it must be a common occurrence.