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AVOID: EZ-Stab / EZ Stab (3rd Gen Red) Review

[Editor’s Note: EZ-Stab will be providing a higher-end version of the unit for testing. Performance cars like the 8 apparently won’t benefit from the standard off-the-shelf types for lower marque cars according to EZ-Stab. We will update this review in due time.]

I really hate to do this – especially to someone as nice as Jon – but I did promise an honest review of his new EZ-Stab Red. Now I’ve been testing, and monitoring performance of the EZ-Stab for some 5 months now, so this isn’t some stab in the dark.

The EZ-Stab unit comes in a see-through, translucent red plastic shell. It’s really big, about the size and thickness of two blackberrys on top of one another. I initially had concerns that with the extreme-heat conditions of the 8’s engine bay, the plastic would melt, or the capacitors within would explode, but thankfully that didn’t happen.

So what is the EZ-Stab? It’s a device, unlike Volt Stabilizers that provides “the benefits of a balanced charging system, one that gives a much more stable voltage while reducing the load on the engine…..(sic) increased engine responsiveness, acceleration and power when such benefits may be easily achieved through a EZ-Stab in the system with no sacrifice of vehicle comfort and vehicle warranty. And for additional value, EZ-Stab also protects the battery and ECU for repeated heavy usage within service life.”

Methodology: Periodically tested and monitored with baseline GTech-Pro, Voltmeter and CANBUS ECU readings taken before installation, recorded fortnightly.

Pros: Nice blinking light; solid ABS plastic construction; hasn’t exploded in extreme heat conditions yet

Cons: It doesn’t work – period.

The EZ-Stab has no effect, positive or negative, on the performance / responsiveness of my ride, nor does it provide more stable voltage when the engine/alternator is on high load (cabin lights/ headlamps still dim as per norm under load, and no difference in my substantial ICE setup). Now I’ve seen tons of compliments and positive testimonials from users, but if you read the forums in-depth, there’ll be 1 bad review for every good one. And the majority of those negative reviews come to the same conclusion as I have – the EZ Stab just doesn’t work.

Jon has a PhD in electrical and power control, and works for one of the biggest electronics manufacturers in the world – there is no doubt that he’s a pretty smart guy with the street cred to back him up. But his claims of ” better understanding (sic) the main reason behind the drain of a car engine’s power – the charging system that continues its charging of batteries when the car engine is running, even when they have been fully charged” – is a bit of a fallacy and myth.

Here’s why: Modern vehicle wiring and ECUs are already designed to operate in a harsh electrical environment. They cope with conditions from maybe 8V starting with a nearly-flat battery to 16V on a boost charge, and with electrical interference from mobile telephones etc, without failure. The ECU runs internally at 5V or even less and is heavily stabilised to ensure the processor runs fault-free at all times. Many modern ECUs repeatedly self-check and would shut down the engine entirely if any kind of fault condition occurred. Overall, it is hard to envisage how a more stable electrical supply could significantly improve engine economy, emissions or performance on a vehicle in good condition.

The suggestion made by some sellers of such products, that the alternator on “unmodified” vehicles is always pushing 1 – 2 kW into the battery (and hence “robbing” the engine of this power) also does not fit. Once the battery is fully charged, the alternator automatically reduces its output (otherwise the continual flow of energy into the battery would cause it to boil and ultimately be destroyed), and the mechanical loading on the engine then drops to a relatively low level – though undoubtedly there is still some power loss. The same goes for any petrol savings.

So in summary, and I’m very sorry to say, EZ-Stab is definitely not worth the $180 Jon’s charging for it. Will be more than happy to receive any comments or quantifiable (not butt dyno) evidence that says otherwise…. Sorry Jon


April 9, 2007 - Posted by | Electronics & Gauges


  1. Hi Gfoo, thanks for the review. I did tell you if you are not satisfied with the product, you can always come back to me. By making a post like this here, you are back stabbing me in a very clever way.

    I dont know where you come from, but you are using some groundless arguments.

    Please read the latest Autocar magazine and also Carma reviews. They are based on public open dyno tests and also positive feedbacks.

    Perhaps you should run your car on dyno. The results might make your eyes pop. If you are not willing to pay for the S$100 dyno test, I can pay that for you but you must put the test results here.

    Comment by Jon Wong | April 11, 2007 | Reply

  2. I have worked on REAL cars and not based my arguments on books and Theorectical deductions. Even if you drive a Lexus there are bound to be some misfiring which the ECU cannot save 100%. Please do not use some theorectical assumptions to shoot a product which has proven working in over 2000 cars.

    For your informaion, you should buy the Indonesian AUTOCAR magazine April Issue and see what the true car experts are saying about the device. That is in Bahasa Indonesia, but i can give you the translation also.


    Comment by Jon Wong | April 11, 2007 | Reply

  3. Hi Jon, thanks for your reply. I’ve known you for a long time, and in no way is this backstabbing. I have completely no commercial concerns to do so. My tests were only on the 8, and for the 8, and is based on quantifiable data over the months I’ve had it. I don’t know about dynos as typically dyno-ing a car twice will show differing results by 5% variance so accuracy is unknown.

    Perhaps EZ-Stab doesn’t work that well for fully-electronic performance cars, or perhaps my unit was faulty or not connected properly (it was one of the first in the market according to you months back).

    Yes i’m harsh in my reviews, but i’m very honest about things. If it’s something to rave about, i will. If it doesn’t work as advertised, i will say that.

    I’ll be more than glad to change this review if and when new information/charts/unit is provided for me to do a retest, but until then, i will have to stand by my editorial integrity.

    Again, i like you as a person, and you’re an honest guy, and there is no motive in this, or any of my other reviews.

    Comment by gfoo | April 11, 2007 | Reply

  4. Agreed, that is a good review. Then again, we are comparing 2 different classes of cars.

    However, a caveat that Onedrift is a commercial concern so i hope editorial integrity is in place. Mine’s a blog for the 8 and i’ve nothing to gain or lose.

    Looking at the dyno chart at Onedrift, there seems to be a gain. But being an owner that has dynoed his cars many times whether at Ubi or ST, no two dyno graphs are the same, and there always seems to be a 5% variance & tcf setting also plays a part (those who know dynos know what i mean).

    Comment by gfoo | April 11, 2007 | Reply

  5. That was the average of 3 runs which has evened out the average and shows the net gain.

    Anyway, we communicated. Your car and your good self might need the higher end version. If you agree, I like you to test and use for free.

    Thanks for your input.

    Comment by Jon Wong | April 11, 2007 | Reply

  6. Thanks. I’ll be more than glad to do a re-review of the higher-end version.

    Comment by gfoo | April 11, 2007 | Reply

  7. I am looking forward to the review on this higher end version.. Currently like gfoo the EZ-Stab does not work and I am seeing no benefits at this time..

    Comment by zika | April 12, 2007 | Reply

  8. Hi Zika

    I made a few mistakes:
    1. Installing a EZ-Stab standard on a high spec RX-8
    2. Installing a EZ-Stab standard on a highly tuned RX-8
    3. Maximizing economy for RX-8 (?)
    4. Vibration reduction for a rotary (?)

    Yes indeed the RX-8 is high spec performance car with a very different requirement. The EZ-stab has seen 80% of development work on low, mid end family saloons. For such cars we have proven effectiveness in fuel economy, smoothness and also modest improvement in car performance.

    I have not many expereinces on the RX-8 and the only performance cars I have worked on are the Subaru range of Legacy Turbos, Forester, WRX. I have done alot of tests and dynos on those cars.

    GFoo has given me a lot of real challenges. I will be very happy to see the set can squeeze 0.3 hp from the Wankle design. My approach is simple: improving electrical supply thru the opportunity in an out dated charging design in all cars. Unlike normal off the mill cars, the RX-8 requires customization. I am looking into a cabin control mode select, most likely thru BlueTooth activation.

    Certainly, fuel saving, vibration reduction are not high on the agenda for you folks here. The EZ-Stab permium versions till now are mainly installed in BMW series, some Lexus, and the Subaru high end cars. They are looking for better comforts and repeatable fuel saving properties. Also, less harshness during high speed crusing.

    Comment by Jon Wong | April 16, 2007 | Reply

  9. Dear RX-8 current EZ-Stab users, I would like to offer a free upgrade to high spec version.

    I like to hear your feedbacks.

    Please let me know. Cheers.

    Comment by Jon Wong | April 16, 2007 | Reply

  10. i am not driving a highly souped up 8 but a family mpv – stream.

    Installed a previous fake version (red) z-stab and subsequently the real one (black) color ez-stab by Jon.

    Does not seem to improve anything too based on butt dyno and no improvement on mileage too.

    Comment by Dreamon | April 17, 2007 | Reply

  11. aiya, have to give me 5 cents comments, I am still using the black colour version of it. And this has been used in my civic (2years)and now transfered to my mz3(3years), using in total of 5 years since i have installed it at a car park in sengkang by Jon. I can only say that it works for me, maybe i based on the feel and not on any dyno. also that time the price that Jon sold it was worth it to me liao. : )

    btw, people say 95 and 98 octane no difference, dunno why i can also feel leh?? I think I going mental liao. : )


    Comment by David | April 18, 2007 | Reply

  12. curious to know gfoo, have u tried Max-Zone before? Heard it mentioned a lot in forums alongside EZ-Stab, both stating they are NOT voltage stabilizers. Would like to hear your expert opinion on that.

    Comment by Curious George | May 7, 2007 | Reply

  13. Hi George – Lead acid batteries work via a process called sulphation to produce electricity, and in the process, accumulates lead sulphate on the plates as a by product. Max-Zone is a desulphator, and i will believe their claim of extending battery life (not that we’ll need it, i would rather just change a new battery after 3-4 years, it’ll still be cheaper than getting a Max Zone).

    However i DO NOT BELIEVE all that mambo jumbo about helping the ECU signals and sensors one bit. All ECUs have very strict, and high-grade voltage regulators to prevent brownouts, short circuits etc. There is NO WAY that Max Zone ‘boosts’ sensor readings and signals – a signal is a signal. Nor can it help poor FC, pinging or emissions. That’s all marketing bullshit.

    EZ-Stab is not a desulphator, and taking it apart, it does do a job of a voltage stab, and a line conditioner.

    Comment by gfoo | May 7, 2007 | Reply

  14. Hi all, our counterparts in Jakarta have done a constant load/ fuel measurement tests. Repeated on Honda, Toyota (fuel injected and carb). The result indicated clearly a repeatable fuel saving of about 15% under constant loading conditions. If you need the original test reports, i can send you a copy.

    We will be updating the complete test record in our website, and Autocar Indonesia, Automotif is now considering the report. Also, please kindly following up on the local Carma updates soon.

    (I know some of you might comment there is a commercial dimension with magazines, but you cannot deny no other products put themselves thru so many public technical testings.)

    A similar test will be done in Singapore using EPA testing protocol. Will keep you updated.

    Comment by Jon Wong | May 18, 2007 | Reply

  15. Belive IT , TRy it lor

    Like it , Then Buy IT lor


    But not ME

    Comment by Vios | June 3, 2007 | Reply

  16. Do EZ-STAB already sell it in Europe country?

    because my friend from Germany are interesting in this product.

    Comment by K.L.Keat | June 9, 2007 | Reply

  17. Man gfoo you’re so full of shite. First u say ez-stab no good. PERIOD some more. Now u say it works. You are as consistent as my bowels with diarrheoa. Someone give u freebie is it? Make u change your tune so fast.

    work or don’t work, let buyer beware lor, no need idiots like you to tell them, and treat everybody like idiots. U give this kind of comments and say such things about ppl who have bought these kinda products, what you insinuate is that these buyers are all stupid and easily conned right?

    reviewer must be objective and most importantly CONSISTENT.
    Since you’re so inconsistent, who the heck is going to believe you are OBJECTIVE

    Comment by phantomoftheopera | June 26, 2007 | Reply

  18. The EZ-Stab showed no signs of any type of improvement on our tests conducted over a two week period. This includes dyno testing, and fuel economy both under controlled conditions and real world conditions.

    Comment by Rich Johnson | September 13, 2007 | Reply

  19. Hi all. Cool site Google

    Comment by sync | February 11, 2008 | Reply

  20. Phantomoftheopera, dude, gfoo didn’t say EZ-Stab worked. He didn’t contradict himself. He merely comparing the proposed functions of a Max-Zone with that of EZ-Stab. He never said that it worked and no one is confused except for you.

    Gfoo is being objective, he said he’d give the higher end model of EZ-Stab a shot and he is being open with the possibility that there could have been error in the testing.

    Dont come in here and try to slander gfoo who is clearly just trying to give an honest review and a breakdown of the result, which are very helpful NOT confusing.

    Gfoo is CONSISTENT and is OBJECTIVE. your merely trying to pick a fight. Maybe something gfoo said rubbed you wrong, maybe you thought his tone was not of your taste. But seriously, i believe your the only one here that is confused, and not being objective to gfoo’s point of view. You sound like an idiot talking about your “bowels” and “diarrheoa.”

    Comment by I2oy | May 2, 2009 | Reply

  21. So in conclusion work or don’t work?

    Comment by mchb | September 29, 2009 | Reply

  22. Try it b4 on my ex-vios in 2006. It doesn’t work at all. No diff with and without it. Luckily, Jon honoured his words n after 2-3 months of usage he actually allowed me to refund.

    Comment by Stan | December 22, 2009 | Reply

  23. I thought the topics you posted on were very interesting. Nice Blog and keep posting 🙂

    Comment by Indonesia Cars | June 30, 2010 | Reply

  24. It is interesting. You will not prompt to me, where I can read about it?

    Comment by copy DVD | July 10, 2010 | Reply

  25. electrical supplies are always available in our local hardware dealer at a discounted price,;*

    Comment by RF Modulator : | October 28, 2010 | Reply

  26. Excellent goods from you, man. I’ve understand your stuff previous to and you’re just extremely wonderful. I actually like what you’ve acquired here, really like what you are saying and the way in which you say it. You make it enjoyable and you still care for to keep it sensible. I cant wait to read much more from you. This is actually a wonderful web site.

    Comment by Stop A Panic Attack From Happening | September 3, 2011 | Reply

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