Have you ever noticed how hard dipsticks can be to read? You get that weird “v” looking thing on the side of the stick or some squiggly line craziness with one side reading higher than the other. Your oil level is about as clear as mud right? This leaves you the tough job to interpret what exactly these incoherent results mean and what's worse they're not even consistent. They change every time you check your oil! OEM dipsticks are not nearly as accurate or repeatable as they can be.
Why? All OEM Dipsticks suffer from the same problem. A seal on the handle required for sealing the crankcase is the culprit. When you insert the dipstick handle into it’s tube, that seal pushes and pulls a pocket of air trapped inside the dipstick tube. This intern, causes the oil level around the dipstick to move in response. How much it moves depends on a variety of factors, all of which lead to the rampant inconsistencies found when using OEM dipsticks.
