Why to use an oil filter cup wrench and how to make it better 

That could be a problem. I just measured my cup wrench using the A/C Delco filter that was used in the video. I have .440" from the back of the cup to the filter can. My extension drive end is 430" in length. That gives me 010" clearance between the end of the extension and the filter can, so mine is fine, but I could see that with all the different cup wrenches and spin on filters that are out there, it could be a problem with some combinations. You said your 1/2" drive slot is way to shallow. Mine are all 3/8" drive and I wouldn't want to use 1/2" drive tools under the hood of any current vehicles. 1/2" stuff is just too big. Great comment. Thank you.

@@StuffAboutCars-jg5tx I mis-spoke, it's a 3/8 drive.

Unfortunately, there are so many different sizes of fluted oil filters being used today, there are a huge number of cup wrenches that are very close in size. I just saw a set on Amazon that has 28 different sizes. It can be easy to get one that's close in size to your filter, but not quite right. Add to that slight production variations between filter manufacturers and cup wrench manufacturers and you have more chances for things to not fit quite the way you'd like them too. That's why I use a shop towel in the cup. Thanks for your comment.

@@StuffAboutCars-jg5tx I will have to try the shop towel trick, but I seriously doubt that that would have worked with the wrench I have and my filter, because the rubber jar opener I used, not only took up the play in the wrench, the same way that your shop towel trick does, but the rubber made for excellent grip as well, and yet the wrench still would turn on the filter, making the wrench worthless! Now if the filter is not on very tight, then it of course works like a charm, but the reason most people are buying this type of wrench for the first time, I am sure often is because in theory it seems like it would be better able to easily remove filters that have been over tightened, than other types of filter wrenches. Congratulations on a good video though, and a good tip for people who have bought these style wrenches!

@@evorider3689 The blue AC/Delco filter used in the video is a 74mm X 15 flute. I just tried a 76mm X 14 flute and it was sloppy, but felt good with a rag in the cup. I see they also make a 73mm and 74mm X 14 flute filter. When you get one or two millimeters apart, it can get hard to tell if you're using the correct wrench. I started using cup wrenches for clearance issues, not for grip. A band wrench has great grip, but they can be hard to use in a tight space. The three jaw type wrenches have great grip, but they can really crush the filter can. There's pros and cons to all of them. Thank you for your comment.

@@StuffAboutCars-jg5tx Thanks for the info.!