Originally Posted By: srhite
Would adding one quart of Royal Purple at oil change time make it easier to check the oil level in an engine? I've never bought the stuff, but I'd pay a couple bucks more for a quart if it darkens the oil enough to make it easier to read on the stick.
Its not very dark on the stick even when you first put it in, and within a day or so of driving it looks clear. Then it begins to soot up just like any other oil. I wouldn't think a single quart would do anything toward making the oil more visible on the stick.
I always look for the meniscus (curled edge) of the oil on the stick where surface tension makes itself visible. Wiping the stick with a rag and then waiting a minute or so before sticking it back down the tube helps make a clean line on the stick.