More than


people buy a new or used RV in the United States each year.
One thing every RV (new and used) has in common;

they ALL have something wrong with them.

Do you know what is wrong with the RV you are planning to buy?

Joy > Regret

You buy an RV to bring your family JOY, to make special memories, to see far away places, taking your dog, cat, and fish with you. You don’t buy an RV to have REGRET, wishing you had known the true condition of the RV BEFORE you bought it.

My name is David russell
(rv shepherd)

I’m a veteran U.S. Navy Submariner. My wife and I are also full-time RVers. I would love to help you have confidence in your RV buying experience by providing a Certified RV Inspection before you finalize a purchase. Schedule a FREE 30 min call with me today.


David saved me from making a bad decision. I was considering the purchase of an RV in Ft. Pierce, FL. I hired David to take a look at… read more

Meredith Whitney Avatar Meredith Whitney
July 17, 2023

We are so glad we found RV Shepherd in our search for certified inspectors. We had a bad experience with another company, so it was so refreshing to find… read more

Cindy Merrill Avatar Cindy Merrill
April 5, 2023

One of the nicest and most professional rv inspectors I’ve ever met. Extremely punctual and knowledgeable. Was kind enough to drive to camping world in Fort Pierce to look at… read more

Emily Rose Avatar Emily Rose
March 26, 2023

It was just by chance we found Dave to do an rv inspection for us. He wanted to make sure we read his reviews so we would be comfortable working… read more

Barbara MacMannis Avatar Barbara MacMannis
March 26, 2023

I highly recommened you hire RV Shepherd whether buying new or used. I’ve been dealing with warranty repair issues on my brand new 2021 Winnegabo for over a year.… read more

Daniel Garcia Avatar Daniel Garcia
February 26, 2023

An inspector with integrity! We hired RV Shepherd to inspect a used diesel pusher. We were pressed for time and he pulled the fluid analysis before doing the inspection. Thank… read more

Gary Bailey Avatar Gary Bailey
January 25, 2023

David @ RV Shepherd is great! He was prompt in getting back to us to set up the initial call, scheduled the inspection with the local RV Dealer, and… read more

Margaret Brown Avatar Margaret Brown
January 11, 2023

No need to shop around. This is the guy. We couldn’t recommend more highly.

Carisa Cunningham Avatar Carisa Cunningham
January 8, 2023

David at RV Shepherd did an excellent job inspecting our new to us 2020 Winnebago View. We were over 1,000 miles away from the dealership and it gave us great… read more

Kristin Weigand Avatar Kristin Weigand
November 30, 2022

RV Shepherd was extremely helpful when I purchased my motorhome. The report was very detailed and provided very useful information. He took a good amount of time on the phone… read more

Laura Taylor Oostdyk Avatar Laura Taylor Oostdyk
November 29, 2022

David is awesome! He is very thorough and checks everything! David was very kind and patience, answering all our questions. I would highly recommend David. He is professional and very… read more

Nicole Hughes Avatar Nicole Hughes
November 19, 2022

I am new to the RV world but it is something my wife and have been wanting to pursue for many years. Even though the RV that I was looking… read more

Jean-Jacques Alford Avatar Jean-Jacques Alford
October 22, 2022

If you want an RV inspector who will go “above and beyond” to get you the information you need to make an informed purchase, then I believe David Russell should… read more

Coral Undzis Avatar Coral Undzis
September 12, 2022

David went the extra mile and found a water leak in a RV we wanted to purchase. Finding the hidden damage in advance of our purchase probably saved us months/years… read more

Johnny Dalrymple Avatar Johnny Dalrymple
September 12, 2022

Real informative, knowledgeable inspector who cares about helping you. Timely, professional communication. Highly recommend and would use this service again if needed.

Rob Adamo Avatar Rob Adamo
July 12, 2022

David is a fabulous inspector! He is thorough with exceptional attention to detail and work ethic. He is very kind and easy to talk to. I feel comfortable asking him… read more

Hairchitexture Salon Avatar Hairchitexture Salon
June 12, 2022

David is good person to work with, very through, high quality service. I highly recommend him.

Jennifer Tipton Avatar Jennifer Tipton
May 12, 2022

Four Steps to Enjoy the RV Life



Schedule a Call


Inspect the RV
has Repairs Made
Enjoy the RV Life


Laboratory Fluid Analysis

Oil and Coolant Analysis Service

Frequently Asked Questions

Why does the NRVIA offer fluid (oil and coolant) analysis services?

Well, let’s say you own a motorized RV, perhaps a large Class- A diesel pusher. You probably already know that the engine, automatic transmission and generator contribute a large portion to the overall cost of the RV. In fact, the engine and transmission are absolutely essential to moving the RV around the country and once you arrive at your destination, the generator offers all the comforts of home. So, why take a risk of anything going wrong with these critical components when it’s so easy and economical to get the data you need to ensure that they remain reliable. Oil and coolant analysis allows you and your service tech to effectively “see inside” your engine, transmission, and generator. Oil and coolant analysis adds a whole new level of diagnostics that you just can’t get any other way. Think of it as Healthcare for RVs”.

Internal parts depend on oils and coolants to remain stable between service intervals. Oil and coolant analysis tells you when your oils and coolants experience any signs of early breakdown or contamination. Not only do we check them for signs of thermal breakdown, mechanical breakdown or contamination; but, we also check for any indication of internal part wear. Oil and coolant analysis allows you to detect anything that might need your attention long before they can result in road calls, expensive repairs or lost travel time. Knowing the condition of your oils and coolants, through periodic sampling and analysis, improves the overall reliability of your motorhome.

NRVIA’s fluid (oil and coolant) analysis service brings you the peace of mind that only comes with knowing for sure that your RV’s engine, transmission, and generator remain as reliable and worry free as possible.

How does oil and coolant analysis affect my normal service intervals?

Most service intervals (also known as Preventive Maintenance or “PMschedules) call for oils and coolants to be changed based on accumulated mileage, accumulated hours or elapsed time (typically calendar months). Changing oils and coolants

is “generally” a good idea but very often it’s not the most economical method of maintaining your RV engine, transmission or generator.
Let’s say you’ve changed your oils or coolants too soon. If there’s still plenty of life left in them, that’s like throwing money down the drain. On the other hand, if you fail to change them when they’re worn out or contaminated, you take the chance of getting into some serious problems that can put your RV in the shop and drain your wallet. If you’re changing oils and coolants without having them analyzed, you are, without a doubt, missing out on some pretty important information that could make a real difference in your plans. Oil and coolant analysis is a very useful diagnostic tool that offers you and your service technician a whole new level of understanding. It allows you to see inside the equipment and determine the true condition of your engine, transmission and generator. It improves your ability to assess these critical RV systems for wear and contamination that could lead to early failures if left unchecked. Oil and coolant analysis enables you to observe systems at a “microscopic level”. This greatly improves your ability to learn about issues that need your attention so you can have them fixed at the earliest opportunity, long before serious problems occur. You’ll know when oils and coolants begin to break down or become contaminated and you’ll be able to see internal part wear issues if they exist.

In short, oil and coolant analysis increases your ability to detect minor problems and schedule repairs, if needed, before they result in breakdowns, repairs and lost travel opportunities. You just can’t get that when just draining and replacing your RV oils and coolants.

What will the oil analysis tell me?

Oil analysis measures additive levels, wear metals, contaminants (such as water or internal coolant or fuel leaks), soot levels, viscosity, oxidation, and nitration. First, the oil is checked for viscosity loss (thinned out oil) and thermal breakdown (too much heat). We also check for signs of fuel and coolant caused by faulty injectors or leaking head gaskets and we check for nitration that may indicate improper fuel/air mixtures. We can tell all of that from the analysis plus we can detect the early stages of wear on internal parts.

Periodic oil analysis enables you to find these problems in the early stages long before real damage occurs.

Your NRVIA certified inspector in Port St. Lucie, FL; Fort Pierce, FL; Vero Beach, FL; Melbourne, FL; or the surrounding area offers advanced oil analysis. Advanced testing is designed to give you data that allows you to tell if your current oil service intervals are correct. In essence, the data will show if you’re changing your oil too soon or running it too long between service intervals.

There are (3) reasons why this is so important. First, it allows you to find problems if they exist. Secondly, the Advanced Oil Analysis allows you to save money by safely extending your service intervals. In fact, some Class-A “Diesel Pusher” (DP) owners are already running up to 25,000 miles between engine oil changes. Third and last, let’s say you purchased a used Class A motorhome that includes a heavy duty Allison automatic transmission. Advanced testing can tell you whether or not you’re running an Allison approved “long life” fluid. Also, if the transmission fluid test shows that you’re running an older technology transmission fluid, you’ll have the data you need to support changing your transmission over to a long life Allison (TES-295 Approved) product. This will save you even more in reduced transmission service over the life of your motorhome.

What will the coolant analysis tell me?

Coolant analysis measures glycol content, additive levels, Freeze Point, Boiling Point, total hardness and dissolved solid levels (mineral content). These tests tell you everything you need to know to fully evaluate your engine cooling system. We’ll tell you if a coolant change is needed and why we think it’s necessary.

What if I can’t tell the inspector much about the oils or coolants that are currently in the RV?

Don’t worry if you don’t know much about the oils or coolants used in your RV engine, transmission or generator. That’s often the case, especially when customers are purchasing a used motorhome and especially if there aren’t any maintenance records. In fact, the oil and coolant information is even more important if the seller doesn’t have maintenance records. Even though some information is missing on the report, the information you’ll receive is still very valuable. The RV Inspector may ask if you know the oil and coolant manufacturers and brand names. If you don’t have that information, don’t worry, we can still tell whether or not you may have any real issues with the engine transmission or generator. Once you begin to know your oil and coolant information, the analysis will tell you how much longer you can safely run them.

Will I receive test reports?

Yes. Your detailed test reports will be emailed directly to your mail in basket or, if you don’t have email, we’ll send the report to your mailbox through the US Postal Service. The reports will show level of Severity. The reports are “user friendly” and color-coded so it’s easy to spot problems (if any exist). Color codes indicate overall Severity of the sample (from 0 to 4). A Severity rating of with 0 indicates that everything is OK and no maintenance is required. On the other hand, a Severity Rating of 4 indicates immediate action is necessary. The color on the Severity rating scale matches the data; so, it’s easy to spot the problem (test result) that led to the overall Severity Rating. The report lists comments and recommendations that instruct you on what was found and what you should do about it.

Note: Once you receive the report and if you have specific questions, we offer a toll free Customer support number at 877-251- 8315. This number is staffed by lab2 professionals who route your call to the Analytical Department where your question will get prompt attention.

I’m sold. So, how do I get this service added to my RV inspection?

Just call your NRVIA certified inspector in Port St. Lucie, FL; Fort Pierce, FL; Vero Beach, FL; Melbourne, FL; or the surrounding area and have him/her add fluid (oil and coolant) analysis to your upcoming inspection. Your NRVIA certified inspector will draw the necessary samples and send them in to the contracted lab for analysis. Your reports will be on the way to you in no time.

One last thing …… If I want to continue this service, how often should I have it done?

The chart below shows the recommended sampling intervals for your RV’s engine, transmission and generator. Just let us know when you’re due for sampling and we’ll send a certified inspector to draw the samples and submit them for analysis. Then, just keep a copy of the report in your historical maintenance file. We’ll maintain it electronically in our database.

Sample TypeRecommendation
Engine OilEvery scheduled oil change
Engine CoolantAnnually (at start of travel season)
Transmission OilAnnually (at start of travel season)
Generator OilEvery scheduled oil change
Generator CoolantAnnually (at start of travel season)

RV Shepherd serves the Port St. Lucie, FL; Fort Pierce, FL; Vero Beach, FL; Melbourne, FL; and the surrounding area. Call today (772)773-6978.