Works great in my Class A
especially on those long highway stretches. I've also noticed the engine seems quieter at idle | which is a nice bonus when we're parked at campgrounds."
"Been using this for about 3 months now in my 2022 Tiffin Allegro and noticed better fuel economy. The motorhome runs smoother too
Good product
By: John S. | 2023 Newmar Dutch Star | 2025-07-22
"Does what it says. Using it in my diesel pusher and no complaints so far."
Better than expected
By: Dave K. | 2021 Thor Palazzo | 2025-05-10
"Wasn't sure at first but after a few tanks I'm seeing improvement in mpg. Worth the price for how much fuel our Class A goes through."
Solid fuel additive
so keeping the engine running well is critical. Since using this additive | I've had better throttle response and the transmission seems to shift more smoothly too."
"Good product overall. Noticed less smoke on cold starts and engine seems happier. We full-time in our rig
Highly recommend
By: Chris B. | 2004 Coachmen Sportscoach | 2025-06-28
"This stuff is legit. My 6.0 Powerstroke runs way better and I'm getting better mileage on our cross-country trips."
Great for older diesels
By: Tom W. | 2008 Monaco Dynasty | 2025-04-12
"Using this in my older motorhome and it's made a noticeable difference. Starts easier and runs cleaner."
Works as advertised
By: Jason L. | 2023 Winnebago View | 2025-09-05
"Can't complain. Does what it's supposed to do and my Class C is running great."
Good stuff
By: Mark H. | 2019 Jayco Greyhawk | 2025-07-18
"Seems to be working well. Haven't had any issues and fuel economy is slightly better on our weekend camping trips."
Impressed with results
and we don't lose as much speed on steep grades. The wife even commented that the ride feels smoother." | By: Steve R. | 2022 Entegra Cornerstone
"Added this to my diesel pusher and within a tank I noticed smoother running and better power. Going uphill in the mountains is noticeably easier now
Does the job
By: Brian P. | 2021 Newmar Bay Star | 2025-08-14
"Simple and effective. My motorhome runs better and I think I'm getting a bit better mpg too."
Quality product
By: Kevin D. | 2020 Fleetwood Bounder | 2025-06-07
"Been using for several months now. No complaints and the RV is running strong."
Works well
By: Dan C. | 2023 American Coach Eagle | 2025-07-31
"Good additive. Noticed improvement in how my Class A runs after using it regularly."
Excellent results
By: Greg M. | 2019 Thor Outlaw | 2025-04-20
"My diesel runs noticeably smoother and starts better in cold weather. Great product for those early morning departures from the campground."
Best additive I've used
By: Paul J. | 2022 Tiffin Phaeton | 2025-09-12
"Tried several different brands and this one works the best for my motorhome. We do a lot of traveling and this has made a real difference in our fuel costs and engine performance."
Really works
By: Ryan F. | 2021 Coachmen Mirada | 2025-05-18
"Skeptical at first but this stuff actually does what it claims. Motorhome runs better."
Good for the price
By: Matt S. | 2020 Thor Challenger | 2025-08-26
"Decent product. Does help with fuel economy and engine performance."
RV loves it
By: Brandon K. | 2023 Winnebago Forza | 2025-06-30
"Engine runs smoother and I'm definitely seeing better fuel mileage. Will keep using this in our diesel pusher."
Keeps engine clean
By: Scott N. | 2018 Holiday Rambler Endeavor | 2025-07-09
"Using this regularly and my mechanic says engine looks great inside. Does its job."
Noticeable difference
By: Adam W. | 2022 Entegra Aspire | 2025-04-28
"After first tank I could tell a difference in how my diesel was running. Good stuff for anyone who drives their RV regularly."
Works fine
By: Craig L. | 2021 Forest River Georgetown | 2025-09-17
"No issues with this product. Motorhome runs well and seems to be getting better mileage."
Great additive
especially when towing our car behind us." | By: Eric T. | 2019 Thor Four Winds
"Really happy with this. My Class C starts easier and runs smoother than before
Improves performance
By: Tyler B. | 2023 Newmar Ventana | 2025-08-22
"Noticed better throttle response and slightly better mpg. Worth using when you're driving something this big."
Does what it should
By: Andrew M. | 2020 Jayco Precept | 2025-06-19
"Good product that works as described. My diesel pusher is running great."
Pretty good
By: Josh R. | 2022 Winnebago Intent | 2025-07-27
"Seems to work well. Haven't had any problems and the motorhome is running fine."
Excellent for diesels
which is important when you're hauling 30 | 000 pounds up mountain passes. I've been using it for three months now and couldn't be happier with the results."
"My 6.7 Cummins runs better with this. Less smoke and better power delivery
Keeps injectors clean
By: Kyle S. | 2019 American Dream | 2025-09-08
"Been using for a year now and fuel system is still in great shape. Does the job."
Worth the money
By: Derek J. | 2023 Thor Aria | 2025-05-22
"Not cheap but it works. My motorhome runs smoother and gets better mileage on long hauls."
Good results
By: Nick P. | 2020 Fleetwood Discovery | 2025-08-11
"Happy with this product. RV is running better since I started using it."
Works great
By: Aaron G. | 2022 Monaco Diplomat | 2025-06-25
"Simple product that does what it's supposed to. My diesel pusher loves it."
Better fuel economy
which gives me more confidence in traffic." | By: Justin C. | 2021 Entegra Anthem
"Definitely getting better mpg since using this. Also the motorhome seems to have more power when merging onto highways
Quality additive
By: Travis M. | 2023 Newmar King Aire | 2025-04-09
"Good stuff. Engine runs cleaner and smoother. Will continue to use in our Class A."
Does the job well
By: Sean W. | 2019 Coachmen Pursuit | 2025-09-21
"Solid product. My motorhome is running better and fuel economy has improved slightly."
Highly effective
By: Cody L. | 2022 Jayco Alante | 2025-05-29
"This stuff really works. My diesel runs so much better since I started using it."
Great product
By: Jordan K. | 2020 Thor Quantum | 2025-08-18
"Been using for several months and very happy with results. Class C runs great."
Works as described
By: Blake T. | 2021 Winnebago Adventurer | 2025-06-12
"Does exactly what it says. My motorhome is running smoother and getting better mileage on our trips to different campgrounds."
Good additive
By: Cameron R. | 2023 Forest River Sunseeker | 2025-07-24
"Seems to work well. No complaints and the RV is performing better."
Excellent product
By: Chase M. | 2019 Tiffin Breeze | 2025-04-18
"My diesel runs noticeably better. Starts easier and has more power. Very pleased with the performance boost."
Really impressed
and I've saved enough on fuel to pay for the additive twice over already. The engine also runs cooler according to my gauges." | By: Dustin H. | 2022 Holiday Rambler Vacationer
"Didn't expect much but this stuff actually works. My motorhome runs so much better
Best I've tried
By: Austin S. | 2020 Newmar London Aire | 2025-05-07
"Used other additives before but this one is the best. Diesel pusher loves it."
Works well
By: Logan P. | 2021 Thor Magnitude | 2025-08-29
"Good product overall. My diesel is running better since I started using this."
Great results
By: Carson J. | 2023 Entegra Reatta | 2025-06-21
"Motorhome runs smoother and I'm getting better fuel economy. Definitely recommend to fellow RVers."
Does what it claims
By: Tanner W. | 2019 Monaco Camelot | 2025-07-12
"No BS with this product. It works and my Class A is running great."
Very effective
By: Hunter L. | 2022 Winnebago Horizon | 2025-04-25
"My diesel runs so much cleaner with this. Less smoke and better performance when climbing hills."
Good stuff
By: Garrett M. | 2020 Coachmen Leprechaun | 2025-09-19
"Seems to be working as advertised. Motorhome is running well and no issues."
Works perfectly
By: Colton K. | 2021 Jayco Melbourne | 2025-05-16
"Exactly what I needed for my diesel pusher. RV runs better and gets better mileage."
Impressive results
By: Bryce T. | 2023 Thor Compass | 2025-08-07
"After just one tank I could tell a difference. This stuff really works in our Class C."
Keeps engine running great
By: Shane R. | 2019 Fleetwood Pace Arrow | 2025-06-28
"Been using this regularly and my diesel is running strong. No complaints whatsoever."
Pretty effective
By: Brett H. | 2022 Winnebago Vita | 2025-07-20
"Good product. My motorhome seems to run better and fuel economy is slightly improved."
Excellent additive
By: Dakota S. | 2020 Tiffin Wayfarer | 2025-08-05
"This is the real deal. My diesel runs smoother and has better power for towing."
Works amazing
even after 50 | 000 miles."
"Really happy with this product. My Class A is running better than ever
Great for cold starts
By: Riley P. | 2023 Newmar Supreme Aire | 2025-09-23
"My diesel pusher starts so much easier in cold weather with this. Really works when we're camping in the mountains."
Does what it should
By: Preston M. | 2019 Thor Miramar | 2025-05-31
"Solid additive. My motorhome is running well and seems to be getting better mpg."
Very pleased
By: Brayden W. | 2022 Entegra Vision | 2025-08-15
"This stuff works great. My diesel runs cleaner and has more power."
RV runs better
By: Cooper L. | 2020 Holiday Rambler Admiral | 2025-06-09
"Noticeable improvement in how my diesel runs. Smoother and more responsive on the highway."
Quality fuel treatment
By: Parker K. | 2021 Winnebago Sightseer | 2025-07-28
"Been using for months and very happy. Motorhome is running strong."
Works good
By: Mason T. | 2023 Forest River Forester | 2025-04-22
"Does help with performance. My Class C seems to run better with this."
Highly recommend
By: Easton R. | 2019 Jayco Seneca | 2025-09-11
"This is the best additive I've used. My diesel pusher loves it and so does my wallet."
Great stuff
By: Landon M. | 2022 Thor Tiburon | 2025-05-19
"Simple and effective. My motorhome runs better and gets better fuel economy."
Works perfectly
By: Connor H. | 2020 Newmar Dutch Star | 2025-08-24
"Does exactly what I needed. My diesel is running smooth and strong."
Good product
By: Jaxon S. | 2021 Winnebago Sunstar | 2025-06-16
"Seems to be working well. RV is running better since using this."
Excellent performance
By: Hudson J. | 2023 Tiffin Allegro RED | 2025-07-31
"My motorhome runs noticeably better. Starts easier and has more power going uphill. We travel full-time and this has made our journeys much more enjoyable. The engine doesn't strain as much on steep grades anymore."
Really works
By: Lincoln P. | 2019 Monaco Dynasty | 2025-04-07
"Not just hype. This stuff actually improves how my diesel pusher runs."
Best additive
By: Sawyer W. | 2022 Entegra Cornerstone | 2025-09-26
"Tried many different products and this one works the best by far for our Class A."
Works as expected
By: Grayson L. | 2020 Coachmen Cross Country | 2025-05-24
"Good additive. My motorhome is running well and fuel economy is better."
Very effective product
By: Bentley K. | 2021 American Coach American Eagle | 2025-08-12
"My diesel runs so much smoother with this. Really impressed with results."
Keeps fuel system clean
By: Everett T. | 2023 Newmar Kountry Star | 2025-06-04
"Using this regularly and fuel system is in great shape. Does the job well in our diesel pusher."
Great improvement
By: Maxwell R. | 2019 Thor Windsport | 2025-07-17
"Motorhome runs better and gets better mileage. This stuff works."
Solid product
By: Emmett M. | 2022 Winnebago Grand Tour | 2025-04-29
"Good additive that does what it claims. My diesel is running well."
Works fantastic
By: Owen H. | 2020 Jayco Embark | 2025-09-15
"Really happy with this. My Class A runs smoother and has better throttle response."
Quality stuff
By: Aiden S. | 2021 Thor Chateau | 2025-05-12
"Been using for a while now and very satisfied. Motorhome is running great."
Does the job right
By: Liam J. | 2023 Fleetwood Southwind | 2025-08-21
"My diesel runs better and gets better fuel economy. Good product for RV owners."
Pretty good additive
By: Noah P. | 2019 Winnebago Minnie Winnie | 2025-06-27
"Seems to work well. Motorhome is running better since I started using it."
Excellent stuff
By: Ethan W. | 2022 Tiffin Wayfarer | 2025-07-14
"This really works. My Class C runs smoother and has noticeably better power when passing other vehicles. I feel much safer being able to accelerate properly when needed. Fuel economy has also improved by about 0.5 mpg."
Works great in all weather
By: Lucas L. | 2020 Holiday Rambler Navigator | 2025-04-11
"My diesel pusher starts easier in cold weather and runs better overall. Great additive for full-timers."
Very satisfied
By: Oliver K. | 2021 Newmar Mountain Aire | 2025-09-28
"Good product that delivers results. My motorhome is running better than before."
Does what it says
By: Elijah T. | 2023 Thor Ace | 2025-05-27
"Solid fuel treatment. My diesel seems to run cleaner and smoother."
Really good product
By: James R. | 2019 Entegra Anthem | 2025-08-09
"My Class A runs so much better with this. Less smoke and better performance."
Works excellent
By: Benjamin M. | 2022 Monaco Marquis | 2025-06-14
"Very pleased with results. My diesel is running smooth and strong."
Great additive
By: Alexander H. | 2020 Winnebago Journey | 2025-07-25
"Does exactly what it should. Motorhome runs better and fuel economy improved."
Good results overall
By: William S. | 2021 Coachmen Freelander | 2025-04-19
"Seems to be working well. My RV is performing better since using this."
Highly effective
By: Daniel J. | 2023 Jayco Redhawk | 2025-09-13
"This stuff really works. My diesel runs cleaner and has more power."
Best fuel treatment
By: Michael P. | 2019 Thor Outlaw | 2025-05-21
"Tried other products but this one works the best. Diesel pusher loves it."
Works perfectly
By: Samuel W. | 2022 Newmar Bay Star | 2025-08-27
"Does exactly what I wanted. My motorhome runs smoother and gets better mileage."
Pretty effective
By: Joseph L. | 2020 Winnebago Vista | 2025-06-11
"Good additive. My diesel seems to run better and fuel economy is improved."
Excellent for diesels
By: David K. | 2021 Tiffin Open Road | 2025-07-19
"My Class A runs noticeably better. Smoother operation and better fuel economy on long trips."
Really impressed with this
which is reassuring when traveling in hot climates. Definitely worth the investment." | By: Matthew T. | 2023 American Coach American Patriot
"Didn't think it would make much difference but my motorhome runs way better. Engine temperature stays more consistent too
Does the job well
By: Anthony R. | 2019 Fleetwood Storm | 2025-09-20
"Simple product that works. My diesel is running great with this."
Works good
By: Christopher M. | 2022 Thor Quantum | 2025-05-09
"Solid fuel treatment. RV is running better since I started using it."
Great performance boost
By: Joshua H. | 2020 Entegra Esteem | 2025-08-16
"My diesel has more power and runs smoother. This stuff really works in our Class C."
Very good product
By: Andrew S. | 2021 Holiday Rambler Armada | 2025-06-23
"Been using regularly and very happy with results. Motorhome runs excellent."
Works as advertised
By: Ryan J. | 2023 Winnebago Realm | 2025-07-08
"Does what it claims. My diesel pusher is running better and getting better mpg."
Works great
By: Tim R. | 2021 Newmar Essex | 2025-10-05
"Been using this for a few weeks now and my Class A is running noticeably better. Good product."
Solid additive
By: Marcus L. | 2022 Tiffin Allegro Breeze | 2025-10-12
"Seems to be doing what it should. Motorhome runs smoother and fuel economy is a bit better."
Really good stuff
By: Brad K. | 2020 Thor Palazzo | 2025-10-18
"My diesel pusher loves this. Starts easier and runs cleaner. Will keep using."
Excellent results
By: Curtis M. | 2023 Coachmen Mirada | 2025-10-24
"Noticed improvement right away. Better throttle response and smoother running."
Works perfectly
By: Vernon S. | 2019 Jayco Greyhawk | 2025-10-29
"Does exactly what I needed. My motorhome is running great with this additive."
Good product overall
By: Dale W. | 2021 Winnebago View | 2025-11-02
"My diesel seems to run better with this. No complaints so far."
Very effective
which really adds up over long trips." | By: Glenn T. | 2022 Entegra Accolade
"This stuff really works. My Class A has more power and better fuel economy. I've been tracking my mileage carefully and I'm averaging about 0.7 mpg better
Best additive I've used
By: Randy P. | 2020 Fleetwood Flair | 2025-11-11
"Tried several brands and this one works the best for my diesel pusher."
Works as described
By: Wayne H. | 2023 Monaco Dynasty | 2025-11-15
"Good product that delivers results. Motorhome runs smoother and cleaner."
Pretty good
By: Gary J. | 2019 Thor Axis | 2025-11-19
"Seems to be working well. My RV is running better since I started using this."
Great for cold weather
By: Keith M. | 2021 Newmar Canyon Star | 2025-11-22
"My diesel starts so much easier now that it's getting colder. Really works when camping in the winter months."
Highly recommend
By: Terry L. | 2022 Winnebago Solei | 2025-11-25
"This is legit. My motorhome runs better and I'm seeing improved fuel mileage."
Does the job
By: Larry K. | 2020 Jayco Precept | 2025-11-27
"Simple and effective. My diesel pusher is running strong with this."
Excellent additive
By: Dennis R. | 2023 Thor Challenger | 2025-10-08
"Really happy with this product. Class A runs smoother and has better power."
Works well
By: Jerry S. | 2019 Coachmen Concord | 2025-10-15
"Good fuel treatment. My diesel seems to run cleaner and more efficiently."
Very pleased
By: Todd W. | 2022 Entegra Odyssey | 2025-10-21
"My motorhome is running better than ever. This stuff really makes a difference."
Works fantastic
000 miles a year and this has made a noticeable difference in our operating costs." | By: Roger M. | 2021 Tiffin Allegro
"Noticed improvement after first tank. Better performance and fuel economy in our diesel pusher. We drive about 15
Great product
By: Frank H. | 2020 Holiday Rambler Invicta | 2025-11-04
"Been using for a month now and very satisfied. RV runs great."
Does what it claims
By: Carl T. | 2023 Winnebago Navion | 2025-11-09
"Solid additive. My diesel is running better since using this regularly."
Really works
By: Eddie P. | 2019 Forest River Sunseeker | 2025-11-13
"Not just marketing hype. This actually improves how my Class C runs."
Impressive
By: Norman J. | 2022 Newmar Ventana | 2025-11-17
"My diesel pusher runs so much smoother. Less smoke and better throttle response."
Quality additive
By: Eugene L. | 2021 Thor Dutch Star | 2025-11-20
"Does the job right. My motorhome is running strong and fuel economy improved."
Works excellent
By: Howard K. | 2020 American Coach American Revolution | 2025-11-23
"Very happy with results. RV starts easier and runs cleaner."
Good stuff
By: Leonard M. | 2023 Winnebago Trend | 2025-11-26
"Seems to be working as advertised. My diesel is performing better."
Best I've tried
By: Albert R. | 2019 Entegra Insignia | 2025-11-28
"This is the best fuel treatment I've used. My Class A runs noticeably better and the fuel savings have been measurable. I keep detailed logs and I'm saving about $40 per tank."
Best fuel additive I've used in 20 years
By: Michael I. | 2021 Toyota Camry | October 15, 2024
I've tried every fuel additive on the market over my 20 years of DIY car maintenance. ZP-500 is the only one where I actually felt the difference. My Camry went from 28.5 MPG to 32.1 MPG average—that's a 12.6% improvement. The engine also runs noticeably smoother, especially during cold starts. I'm now using this in all three of my family vehicles.
Skeptic turned believer
By: David R. | 2019 Ford F-150 | November 2, 2024
I normally don't write reviews, but this product deserves it. My F-150 was getting 16.8 MPG combined. After using ZP-500 for three tanks, I'm consistently getting 19.2 MPG. That's a 14% improvement. The truck also starts better in cold weather and has noticeably more power when towing my camper. Worth every penny.
Mechanic approved
By: Robert K. | ASE Certified Mechanic | October 28, 2024
As a professional mechanic, I'm very selective about products I recommend. ZP-500 is one of the few fuel additives that actually delivers on its promises. I've personally tested it on customer vehicles and seen consistent improvements in fuel economy and engine performance. The PEA detergent formula is professional-grade, unlike most retail additives. Highly recommended.
Saved my old Suburban
By: James P. | 2008 Chevrolet Suburban | September 19, 2024
My 2008 Suburban has 185,000 miles and was running rough. Mechanic said I needed injector cleaning at $600+. Decided to try ZP-500 first. After two tanks, the rough idle disappeared and the hesitation on acceleration is gone. MPG improved from 13.2 to 15.1. This product literally saved me hundreds of dollars in repairs. Can't recommend it enough for high-mileage vehicles.
