TKM Tools Oil Sampling Pump - Made in USA - Oil Analysis Sampling Pump with Vacuum Release Valve - Works with 5/16-inch Hose, 1/4-inch Hose (Most commonly Used) and 3/16-inch Hose

Works good easy to use it's a good quality unit.

Good packaging, quality product, as described will accept multiple size hose. Works very well. Makes taking samples extremely easy and clean. So if you are tracking the wear on your engine or monitor the transmission or coolant this makes it so much easier to obtain samples. The release button allows you to exactly control the sample size and stop the flow when you want. Very sturdy build quality. Think it will last for many years.

Because oil is thick pull handle slowly or it will break. Works well if you do multiple pulls

I bought this so I could keep tabs on my new Truck and its engine, since there's a huge recall on earlier model years. First, this works amazing! I was able to put a thin tube down the dipstick tube and pull oil into the bottle! Be sure you order wide mouth bottles with a 38-400 cap. Many bottles sold here are wide mouth, but do not have that thread on them. Also, new GM oil dipstick tubes are incredibly small. A 1/4 OD tube will not go down to the oil. You need a smaller diameter one. Search for "4mm OD Bowden Tube" you can buy a very short length for just a couple dollars.

This pump works great! It has and keeps great suction, it pulls the oil up fast, and its durable! I have had mine for a few years now and it has maintained its functionality. I use mine for Engine oil samples and air compressor oil samples on locomotives.