You guys have been great to work with as a first time airplane owner. Thank you very much for the report.

I had my Rover on oil analysis and the first guy that actually knew what those reports said, bought the truck at the full asking price. : )

I emailed a question to you folks yesterday and got a detailed answer today! I can’t tell you how refreshing that kind of service is. After receiving my reply I took a moment to check out your website. Most impressive! and I spent an hour or more reading different sections.

When I came to the article entitled “Tales From The Oily Side” I wondered what on earth that could be about and so I read it. As a one time journalist, if someone had told me that the owner of an oil testing company could write well enough to impress me I would have laughed. But I am not laughing now! Jim Stark obviously had what it took to take on the difficult task of starting, running, and succeeding at business. But between you and me he could have just as easily have succeeded as a writer. I thoroughly enjoyed reading his account of starting Blackstone Labs and was very sorry to learn that he had passed away. Inspiring story in a time all too full of negativism.

I want to thank Blackstone for probably saving my engine in my beloved Xterra. I had my timing chains done and had the oil analyzed at the first oil change. As a result of your analysis an issue with the parts was uncovered and turned out to be a defective or improperly installed timing chain kit. As soon as I showed the report to the shop they were able to quickly diagnose and correct the issue. Thank you all so much!!

I sold my 2014 Jeep Grand Cherokee diesel for $5,000 more than Kelly Blue Book. The guy who bought it said he was impressed by all the oil analyses and transmission fluid reports I had from Blackstone, and that that’s why he paid me my asking price because he doubted he would find a well cared-for vehicle. Your oil reports are worth their weight in gold when selling a used vehicle!

Best news I’ve heard after a horrible week! I was worried due to the little froth of metals on my magnetic drain plug at my last few oil changes.

My plane’s most recent oil sample was sent a couple weeks ago. Before that analysis was processed, we tore down the top of the motor to replace what we suspected were high-time, worn cylinders. My oil analysis on that last oil change arrived in my email today, and while you had no idea we were going to remove the cylinders, your analysis indicated abnormally high metals and you suspected cylinder scuffing in your summary. You were SPOT ON!  now have faith that this oil analysis is money well spent.

Wow, best news I’ve heard all year! Thanks!

You guys were totally right. I accidentally put down 0W40 when in reality this is a 0W/20.

I am amazed! You all are the best. Yup, you caught the fact that the pushrod tube gaskets were changed on both due to some leakage. Also, the front engine I had just replaced #3 and #5 cylinders after overhaul due to cracked valves. Thank you again and keep up the stellar work.