This is a USB-C Rechargeable HD Mini Fluid Transfer Pump for oil and gasoline… Diesel and Heavy Oils such as 15w40 it technically ‘can’ but may cause motor to overheat if fluid is too thick like those mentioned. Attempt at your own risk… or just play it safe and within normal parameter (thin to mid viscous oils). This uses an RC Racing Fuel Pump, Discharge Charging Module with LED battery level indicator, USB-C female port, 3.7v (Li-io battery #21700) battery, and an additional momentary switch with extended button to replace micro switch on charging module. I also replaced the 3 pin (which had forward and reverse) toggle switch that came with fuel pump with a 2 pin switch (one direction) so I could shorten the pump housing length by cutting the tube and removing electrical parts for the 3 pin switch it came with (which took up lots of space in the tube). Will be uploading wiring diagram soon if needed. I also included a magnetic attachment that accepts a rectangular Neodymium Magnet and then needs to be super glued to the back (also magnet attachment is made of PLA, PETG or any hard filament and the magnet attachment cover is TPU). I use this for Automotive fluid services, water removal from toilet bowl to service, etc. to name a few. Hope this makes your all's life a little easier like it did mine. Have fun building, and all parts are available on Amazon.