Sometimes you'll use our Find Your Model tool to choose your vehicle and you get recommended something that looks like this:
The reason an adapter gets recommended is usually because we've been warned that the vehicle in question has a recessed oil drain port, which means the drain port itself is not flush against the wall of the oil pan. It can look a little like this:
When your oil drain port is recessed, installing most Fumoto valves becomes impossible because the head of the valve will hit the part of the pan that sticks out further than the drain port. This is where adapters come into play.
Using an adapter allows you to offset the head of the valve so that you can install the valve and fully rotate it without it hitting the pan wall or lip, which leaves you, and us, kind of frustrated.
When does the SX valve help me avoid this?
SX valves can help you avoid adapters, but only when the valve can be pointed away from the ground. In the photo immediately above, an SX valve would be an easy install that would avoid the need for an adapter because the valve body can be pointed away from the ground and toward the passenger side of the vehicle. The one above is on an Acura RDX.
A good install for an SX in a recess might look like this:
Some other recesses simply require adapters in all situations because the shape of the recess doesn't allow you to point the valve away from the ground:
In an instance like this, if you choose to go with the SX style, you'll also want to couple it with an adapter to be able to rotate the valve away from the ground.