The pre-paid service is great, just avoid dealing postage.

Bryan L Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

AOA only does oil analysis for Aircraft and they do a really great job of it! I have been using them for over 25 years and am very happy with their quick-turn oil analysis!

Paul R Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

Good thanks

James R Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

Works fine. Quick results from AOA. Never had any issues from them.

James C Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

Easy and fast. I got my results within 48 hours of them receiving the sample.

John R Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

This is a convenient way to keep an eye on your engine health.

Dragos M Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

Promptly received, easy to collect oil and prepaid postage to send back the sample. In about 2 weeks Ive received the results.

Dragos M Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

Have been using SALs also known as AOA for many years. ALS need to offer lower price for their kit.

Abbas N Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

Súper Good seller !!

Danilo R Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

Still the go to for me, over many years. Love the shipping prepaid option.

Bryan L Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

Product was exactly what I needed and it arrived on time.

Thomas D Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

This is a reorder. I have used this company for the past few years and are happy with the reports

Richard D Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

Iver used this every oil change since OH. Peace of mind + resale value.

James W Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

Have used AOA analysis on all oil changes since engine was new and allows complete documentation of engine ware. AOA is always fast in posting results.

Thomas R Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

Correct item and on time

Palm S Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

Too early to tell as results are not back yet

Art T Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

This is an awesome way to get your oil sampled.

Joseph M Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

I use this analysis service for every oil change. The report is easy to ready. Great service!

Johnnie D Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

Been using them for years. If used consistently you can monitor trends I. Engine wear.

Flight E Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

I have been using a AOA exclusively and I’m very happy with their service!

Paul R Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

Great thing to do for your plane and great peace of mind!

Emerson P Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

Very efficient organization. Have 600 hours on my IO540 with a sample ever oil change. Good confidence builder. Normally 5-7 day turn.

Terry M Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

Earlier today I submitted a negative review because I had not received my analysis results. After an intense search, I came upon the missing stub and called ALS with my information. They said it was possible my email (analysis) went to my Spam folder. They re-sent the results within minutes, and while the results were not good, ALS did what they were supposed to do and I am satisfied. I just wish this review method allowed for editing or deleting your own reviews.

Have been using for the last 4 years…no issues.

Charles M Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

Affordable and good service used for over a decade with satisfaction. Only regret is that the price has rosen, including return postage which is of no use abroad. S. Berger

Berger E Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

Using them for years. Good value. Wish they would come up with a twin kit.

Red M Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

Have been using this analysis on every oil change since I bought my plane back in 2014. Provides a good trend line of critical metals to watch for. Now running about 1495 hours since SMOH and still going strong!

Brian M Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

Very good service to have especially for TSIO engines

Robert B Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

Good information, reasonable turn-around time. Useful for tracking trends below their green/yellow/red thresholds for contaminants. One needs to be very consistent in reporting oil added as that has a noticeable effect on contaminant levels reported.

A&p S Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

I have been using AOA for 22 years now and I trust it as my insurance policy for the engine on my airplane! I use it every 50 hours without hesitation and I’m very happy with the quick service and that easy to read results they provide.

Paul R Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

I have a record of my engine analysis since overhaul. I have a trend established and will keep the record current. I believe everyone should monitor their engine in this manner.

Larue S Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

Have used this service exclusively for over five years on our fleet and my personal aircraft. Very pleased with the product.

A&p S Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

A must do if you are changing your oil Great product. Drop it in the mail and a week later you get an e mail with the results

Philip C Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

Been getting these since I bought my 182. What do I know of accuracy but they send a nice report and keep track of your old data too.

William A Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

Very easy to use. It takes about a week to get the results.

Jon R Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

Ive put 1300 hours on my engine in the past few years. I have over 2000 hours on now and do oil analysis with every change at 50 hours. The analysis helps a lot to keep me and my plane safe, and Its a simple process with prepaid postage.

Jess G Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

perfect...

Jim H Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

Always a peace of mind when I see the little green check saying all is well.

Dan K Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

Just add oil and drop in the mail. In about a week you have your results. First use with new engine and everything was normal.

Mark B Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

Always good.

Gil A Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

Works as described l, no issues. Gives peace of mind knowing the innards are not disintegrating.

This is a good analysis service, and I really like the included postage. Its a very simple process.

prompt shipping

Order arrived promptly as advertised.

Have been using the AOA test for years. They are very quick to respond and service from Spruce is great as usual. Do get the postage paid units because USPS cost seems to vary alot depending on the post office.

I ordered these kits for a friend whos airplane I maintain. He had been using a different analysis company but they are no longer in business. He ask me for a recommendation and I have been using AOA for many years at work and they have always been excellent, so I recommended AOA.

On time delivery, easy to use website, great selection of products.

Prompt shipping & delivery, product as advertised.

I use this oil testing kit for every oil change. I highly recommended...

Second time I’ve ordered this kit. 1st time was use and return analysis was quick, easy to understand, informative.

Simple kit. Essential to monitor engine health.

Easy to use, the lab keeps track of historic trends, and sends you reports.

The 4th oil analyst kit purchased within the last year.

AOA oil sample is an excellent tool for checking your engine wear metals. Form is easy to fill out, return sample results come back quick and are easy to understand.

An easy way to check your oil. This is my 2nd order.

Reliable services as usual!

Easy to order, quick ship! Using these kits for 30 years. Especially confidence inspiring in a single engine plane. Helps you to understand your engines health.

These guys always do a great job.

Great product with a quick turn around time for your results.

I have been using this facility for 10+ years and 20+ samples over more than 1000 hours flight time. Nothing but prompt and reliable service

Purchased my first plane in Feb 2015. Started oil engine analysis because the plane had sat for 3-5 months before I purchased. Initial result showed 44 ppm Fe and after about 80 hours of engine use, the last result showed a decrease to 33 ppm Fe, Aluminum at 8 ppm, Copper at 3.4 ppm, and Chromium at 3 ppm, so a good inexpensive tool to see whats going on inside your engine. Purchase of kit includes the cost of the analysis when sending in oil sample. Will continue to buy and use these kits.

I've been using AOA for the last 3 oil changes and have been pleased with their results and turnaround times. Only thing that would be better is if they had pre-paid shipping available to save the postage step.

This was super easy and fast. However, I received a more comprehensive analysis from Blackstone Labs and will likely continue to send my samples to them.

David B Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

Been using AOA for years but wish I could still get the analysis kits without prepaid postage. The little mailer envelopes are cramped at best and I could previously toss the sample in a small box and send via 1st Class Mail w/tracking for ~$5.10. So what used to cost me $18.05 total in 2021 is now $23.50 in 2023 (a 30% price increase while forcing me to use their crappy little envelope). I realize this isnt an Aircraft Spruce issue but is an AOA issue.

Charles N Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

Good service. It would be nice if the prepaid postage youre paying for also worked from Canada. This is a bit of a waste.

David W Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

Like others have stated, they need to come up with a Twin Kit.

Good

Julien S Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

I would have given the sample kits 5 stars but I wish they sold them without the prepaid postage. I dont use the post office anymore since their service has become so unreliable.

Analysis is good but the lab mistyped my email address the first tine and every time they send to incorrect address since they use N number to send results and so I don’t get the results. I guess I’ll call again on Monday.

Works like it should

...5 STARS WOULD HAVE ARRIVED NEXT DAY, GOOD RESPONSE, FAIR TIMES IN TRANSIT FOR ALL ORDERS, PLEASE DOING BUSINESS WITH SPRUCE, AS I HAVE FOR MANY DECADES...MFM, CFI, ATP

One of the best resources that I use

I will able to rate this prepaid kit if the postman doesnt return it this saying that I have to take a package that small to the post office personally . Sent it off today

Great price and fantastic customer service when you call them. Get the version where you pay for shipping (so I have been told). I am impressed with how fast they email you the results. They track and trend and write a brief note about the sample after testing. The only reason I did not give it 5 stars is it is not a super comprehensive analysis as far as the number of metals and such they test for (but if they tested for more they might have to raise their prices). But they test the important ones and show you the trend for each metal. Gives you a great idea of the internal health of your engine. I have used them for 5 oil changes and will keep using them. Given the price, they are a great deal.

I have been buying these for years. The company that provides the results usually does the testing and reporting in a few days after receipt. They offer an online lab report that is a little cumbersome but still fine to receive the results. They do say that they will do special testing on the samples at no additional charge! They specifically said they would do tests for lead, water, and diesel fuel contamination upon request. You just add it to the transmittal sheet. I plan on doing that upon my next oil change.

I followed procedure given in the kit and mailed it to them via USPS but it appears USPS lost it. Been two weeks and kit has not arrived. Talked with AOA and theyll let me know if/when delivered. Their product: Good. Post Office: Not so good. Postage: $4.50

The product and the service from AOA is great. I do wish they had a little more analysis information like some of the Blackstone reports Ive seen, but over all it gives the information thats needed and the turn around is fast. The only thing I really wish they would do is have a customer number I can fill out so I dont have to enter everything on the form each time. I should just be able to put my number, hours on the oil and they do all the math to figure out TT, TSTOH, etc.

Update after my first review. I received the results via email about an hour after I made the phone call and have since upgraded my review to four stars.

Not the great, no much information, very little.

Indar H Verified Purchase

Basic Analysis For Piston Engines With Prepaid Return Postage

The correct part was delivered a few days after I reported the incorrect parts were in the box originally sent.

It would be much better, easier, and convenient if the mailing envelope was already postage pre-paid, even if the kits cost increased to cover that pre-paid postage.

Joined a small flying club where previous owners had used these kits. Sent our first sample away since three years had passed, and AOA still included the airplanes previous samples which makes the data more meaningful. What would be even better would be statistics on our sample versus others of the same engine model and a graph on what would commonly be considered an average range. We just have data to compare to other data, which is meaningful, but not as good as additional points would be if they shared such from their database. Having read the 24 hr turnaround time, I emailed once it was late and called a day later upon getting no response to my email. They were friendly, and got the results to an analyst so that a report could be generated not much past 72hrs from their receipt of the sample. If my service level was typical, I would suggest advertising a week turnaround, or 4 days from receipt. I will use them again.

In multiple attempts the results have taken more than 24 hours after they receive sample. In fact, my average has been 6 days after they receive. With new USPS First Class Package rates, may be more economical to now use a different lab.

I sent my oil sample nearly two weeks ago. Curious if it was even received by the Lab, I telephoned today to inquire. The polite gentleman on the phone informed me my sample was received but has not yet been analyzed, citing theyve been busy. The 24 hour turn around is misleading and since Ive yet to receive the results, I have to settle on a two star rating at this point.