convenient, great service. I use on every oil change.

Warning! Contains a Plastic Straw! May not be legal in your jurisdiction. But really this is a solid oil sample kit. Just make sure to take a sample mid drain. Oil analysis is great for establishing Trend Monitoring, meaning you have to sample at every oil change, not just once in a while.

Easy to use, the straw is to collect oil , not for drinking. Great way to see if you are going to need to start saving for a repair. the oil kit is great

If you want your sample reading returned sooner send it first class or priority mail. If you use the postage paid it will take much longer. Using First Class mail, I usually get my samples results within a week.

Great company. Great product. Metal Check has been used on my O-360 from first oil change at 25 hours to most recent at 2035 hours. Oil changes are at 50 hour intervals. Excellent product, technical support and timely turnaround.

To no fault of aircraft spruce, the prepaid postage of this product is a joke. I could have walked the sample to the lab quicker than it took the apparent combination of USPS and FedEX. Samples were shipped on a Wednesday didnt showing tracking until that Friday. Checked the following week for delivery status and showed not to be delivered until the following Friday. Checked the Monday after and now showed delivery not going to be until Thursday. Thats 2 weeks and 1 day to ship from Oklahoma to Louisiana. DONT DO THE PREPAID POSTAGE!!!!!!!!! Other than that its a valuable tool for trending engine conditions and wear.

Used prepaid postage version. Took 4 weeks for them to get it, and didnt have a tracking number so I had given up on it. Finally I received the results but since it was the first sample I submitted I had nothing to compare them to so it meant absolutely nothing to me. They didnt offer me any Normal numbers for comparison. So at least next time Ill have a comparison.

Kit is fine but it takes 3 weeks to get results. Next time I will get the option with no return postage and ship at the post office.

Fast and simple to use. An inexpensive way to monitor your engines health. Five stars if you live in the USA but I live in Canada so there is no free shipping if it isnt mailed with in the USA. It should say that on the net but I only found out after buying one.

Description should include the sampling directions. Turns out I already drained my oil, so cant take a sample.

Easy to use and provides essential information on the health of the engine. The postage paid version is very convenient.

I have used AV-Lab kits for years .I like to pay the postage myself because the sample get there quicker.

I am so glad you have begun selling these...so much better than dealing directly with Av-labs and their ludicrous shipping charges.

Great easy health check on your engine. Gives you a heads up when your engine is starting to eat itself. I donâ??t know why it is not a required part of every engine condition inspection.

We depend on these for aircraft that needs to have their oil checked regularly as well as the individual who just wants to know how their aircraft engine for contaminants.

It arrived a week ago just as expected.

Quick analysis and tracking of your engines health by using these inexpensive kits. Highly recommend for peace of mind concerning your powerplant.

Easy to use, everything needed to collect a sample either at oil change or in between is included. Drop it in the mail & get your results along with previous two tests, if you are a return customer.

easy to use

Stock in trade oil analysis. Fast, economical. Online record of priors. I pay my own postage when I send the samples.

I USE IT TWICE A YEAR

Order came very quickly and was correct.

Donâ??t use or pay for their return postage, itâ??s a rip off and the oil sample does not get delivered to them in a timely manor. So much wasted time...

My usual kit to use to check oil at every change. Quality and quick processing. My order arrived quickly, even though ordered during Christmas rush.

Dont ever, ever use the pre-paid postage option, what a complete DISASTER. Update: after 22 days of waiting, the oil sample has still not been delivered to AV LAB, and there is absolutely no end in sight. I would like a refund for the kit and postage. I will have to re-buy the kit, re-take the oil sample and re-ship using a reputable company like UPS or FedEx. What a nightmare and circus of a service that is offered by AV LAB.