Ever notice how yours 'dances around' when you rev the engine? The seal is worn. A worn dipstick rubber seal can cause a vacuum leak too (it’s part of the crankcase ventilation system). It should fit snug in the guide tube.
If you damaged your dipstick guide tube trying to remove it, we have those too.
Toyota discontinued the dipstick for the 1981-1984 models, but if you replace the them as a kit (dipstick and guide tube), you can use these newer style types. BUT!!! they must be replaced as a kit or else the dipstick will give you false oil readings.