5.0 out of 5 stars Great quality additive

M.M. · 22 May 2025

(function() { P.when('cr-A', 'ready').execute(function(A) { if(typeof A.toggleExpanderAriaLabel === 'function') { A.toggleExpanderAriaLabel('review_text_read_more', 'Read more of this review', 'Read less of this review'); } }); })(); .review-text-read-more-expander:focus-visible { outline: 2px solid #2162a1; outline-offset: 2px; border-radius: 5px; } Works well and not too expensive.

5.0 out of 5 stars Fantastic brand

D.M. · 17 November 2024

Used it in my BMW 320d as a preventative measure and it worked brilliantly. Never had any issues with it, great product from a top brand.Not even crazy expensive, simple to use and you can feel the benefit.

5.0 out of 5 stars Very effective

v. · 26 April 2025

It offers immediate results in cleaning the DPF

5.0 out of 5 stars Perfect for Audi q7

A.C. · 18 June 2025

Fantastic

4.0 out of 5 stars Respected company but will it work?

M.E.K. · 21 September 2021

I have a " drivetrain" error in my BMW 320d 2012 that appears only when i accelerate which could be for one of 3 possibilities, blocked particulate filter, clogged fuel filter or bad fuel pump. I used the product few days ago and the error still appeared on one occasion . I have to give it more time to see if it works. But so far i am pleased with the german product which I trust

5.0 out of 5 stars did the job, cleared the warning light.

I.H. · 27 June 2024

Bought this because as we only do short journeys the filter was not cleaning itself and we were getting a warning light on the dash. Put this into a full tank of fuel and 6 months later when I'm writing this review we haven't had the warning the light come on again at all.Very impressed, If you have a warning light on this is well worth a try for the money.

5.0 out of 5 stars It worked

D. · 3 November 2024

This got rid of the warning light ....Took about 3 weeks of normal driving to work.Very happy

5.0 out of 5 stars very good

f.d. · 7 February 2025

very good

Ottimo

m. · 2 July 2025

(function() { P.when('cr-A', 'ready').execute(function(A) { if(typeof A.toggleExpanderAriaLabel === 'function') { A.toggleExpanderAriaLabel('review_text_read_more', 'Read more of this review', 'Read less of this review'); } }); })(); .review-text-read-more-expander:focus-visible { outline: 2px solid #2162a1; outline-offset: 2px; border-radius: 5px; } Ottimo

Qualité prix

K. · 19 December 2020

Produits efficace

マツダ　1.8D

お. · 6 June 2025

DPF再生間隔が180くらいに落ちたので使ってみたところ250くらいに伸びました。また落ちてきたら使用してみたいと思います。

مخصص لتنظيف دبة البيئه

ع.ا. · 16 April 2024

للسيارات الديز تفرغ العلبه في تانك الديزل وتعبي التانك الي النصف وتمسك طريق والافضل تحط القير بالوضع العادي على الغيار الخامس وتمشي تخلي ال ار بي ام الضغط مابين الاثنين والثلاثه وتمشي مدة ساعه او اكثر وتنظف معاك الدبه اذا كان الانسداد بسيط

GREAT FOR DPF CLEANING!

S.W. · 25 March 2025

5-STARSThis is a review on Liqui Moly Diesel Particulate Filter Protector. I am giving this product a 5-star review. This product decreased regen frequency (good) from previous additive and decreased frequency (good) from baseline, which suggests that it may have cleaned the DPF to some degree or enhances combustion action to burn cleaner. This product has worked the best so far out of all the additives that I have tested. My vehicle has driven farther between regens with this product. This product increased miles between regen intervals than previous additive (Liqui Moly Pro-Line Diesel Cleaner), and increased mileage form baseline figure. As far as mileage goes, vehicle lost mpg by 0.7mpg on uphill route, but gained 2mpg on downhill route. Most of the time, power seemed to increase with less throttle input, but one day the engine seemed a little sluggish. Engine seemed to run about the same as baseline. I did not get any engine error codes while using this product. Liqui Moly Diesel Particulate Filter Protector seems to work very well at cleaning the DPF filter, or at the very least, burns very clean with less soot buildup. I got the longest mileage between regens with this product over all the others. Only exception was Archoil AR6500, but only while towing a heavy load during hot weather, which produced higher EGTs.No check engine lights came on. Vehicle showed no adverse affects from additive.Regen mileage interval with NO additives was 384 miles after receiving vehicle from repair shop and working properly.I used two, 250mL bottles mixed with 34 gallons of fuel.Mileage between regens increased from 384 miles (baseline) to 625 miles (+241 miles increase)(good).The product that I used previously was Liqui Moly Pro-Line Diesel Cleaner.Liqui Moly Diesel Particulate Filter Protector increased interval miles from previous additive(good), 444 miles, to 625 miles (+181 miles)(good)This product is my #1 pick so far as a DPF cleaner. There is no removing any components. Just pour in the tank and drive. Price would add up up as an everyday solution, so not the best choice for everyday use. For everyday use, I would pick Archoil AR6500 at the standard/lower dose for an economical and everyday use. My choices may change as I test more products.When using any DPF cleaner additive, I would try to incorporate a regen cycle during use and go on longer drives on highway or freeway to increase the EGTs to burn off the soot.Driving Notes:30 miles driven during regeneration cyclesSoot down to 3 gramsEGTs = 556F temperature, normal highway drivingEGTs = 703F temperature during regeneration cycleInjection quantity at idle at baseline=9mmInjection quantity at idle after Liqui Moly Diesel Particulate Filter Protector=7mm#1 #2 #3 #4 #5 #6 #7 #8Injector balance at baseline: -0.5, 0.1, -0.2, 0.9, -0.6, -0.1, 0.0, 0.4Injector balance after additive: -1.0, 1.0, -0.1, 0.9, -0.7, 0.1, -0.7, 0.6Less fuel being used at idle.Small boost in mileage from baseline on downhill route:Decrease (BIGGEST) in regeneration intervals:From baseline: longer distance between intervals +241 milesFrom previous additive (Liqui Moly Pro-Line Diesel Cleaner): longer distance between intervals +181 milesInjector balance seemed to widen slightly.My review is based on product efficiency, any damages to vehicle, check engine lights turning on or off, ability to clear engine codes (if my vehicle has any check engine lights), increase or decrease in mileage, and increase or decrease in regeneration mileage intervals. I will not use price as a factor. You will have determine if product is worth the cost. These products may or may not save you costly repairs or replacement. I cannot determine if these products can or will damage your vehicle.My vehicle has no check engine light or error codes. My vehicle is in good working order with no current issues during this review. My vehicle has over 200,000 miles. This is a stock vehicle, with a stock (OEM) factory tune installed. Just prior to this test, my truck was not performing a regen cycle. Repairs were done which included a new 9th injector, new DPF pressure monitor. The pressure monitor measures pressure before and after the DPF filter. The difference in pressure allow computer to estimate how much soot has accumulated in the DPF filter. A force regen was also performed on my vehicle and a passive regen performed before I received my vehicle from repair shop. Vehicle is performing as it should.Test drive is relatively the same and consistent. 49.5 miles one way, with a drive time of about 56 minutes. There is a gradual 1129 foot elevation gain one way and 1129 elevation loss the opposite way. There is some surface street driving, some freeway driving, and most of drive is highway.Hope this review helps. I will be writing more reviews on other diesel additives. I have some data from other additives for comparison listed below. Most products seemed to help and a couple seemed to worsened DPF performance during testing.You should not compare the towing data for comparison. I have just added it to show that towing will change data. Towing will increase exhaust gas temperatures and should make the DPF more effective. My regen mileage intervals increased, decreasing regen frequency, while towing.There are many factors that affect the DPF performance. The factors that I noticed (on my vehicle) are outside temperature, humidity, and EGTs. Lower temperatures decreased DPF performance. Higher humidity decreased DPF performance. Higher outside temperatures and lower humidity seem to increase DPF performance. Higher EGTs such as towing increased DPF performance. Longer driving distance seems helps the DPF filter as optimal temperatures are reached. It seems like soot accumulates faster when the engine and DPF filter are not warm/hot enough, and faster within the first 10-15 miles of travel. If you are only making short trips then the DPF will fill up faster and regens will be more frequent.Regeneration Interval Mileage Comparison of Different Additives:baseline (no additive), 384 miles between regeneration intervalsArchoil AR6200 Fuel Treatment, 391 miles between regeneration intervals,+7 mile increase from baseline, +7 mile increase from previous additive(none, baseline)Wynn’s DPF Regenerator, 462miles between regeneration intervals, +78 mile increase from baseline, +71 mile increase from previous additiveSeafoam (high dose), 504 miles between regeneration intervals, +120 mile increase from baseline, +42 mile increase from previous additiveNitrox Clean Cat Diesel, 324 miles between regeneration intervals, -60 mile decrease from baseline, -180 mile decrease from previous additiveArchoil AR6500 pulling trailer in hot weather (not same comparison) , 1075 miles between regeneration intervals, +691 mile increase from baseline, +751 mile increase from previous additiveNitrox Clean Cat Diesel 2nd try, 402 miles between regeneration intervals, +18 mile increase from baseline, +78 mile increase from previous additive(Nitrox Clean Cat Diesel)Liqui Moly Diesel Purge, 265 miles between regeneration intervals, -119 mile decrease from baseline, -137 mile decrease from previous additiveWynn’s Turbo Cleaner, 298 miles between regeneration intervals, -86 mile decrease from baseline, +33 mile increase from previous additiveRislone Hy-Per Diesel, 323 miles between regeneration intervals, -61 mile decrease from baseline, +25 mile increase from previous additiveRislone DPF Clean, 323 miles between regeneration intervals, -61 mile decrease from baseline, 0 mile difference from previous additiveArchoil AR6500 pulling trailer in hot weather one way, cooler temps coming back(2nd trip, different route) (not same comparison), 680 miles between regeneration intervals, +296 mile increase from baseline, +357 mile increase from previous additiveCataclean, 414 miles between regeneration interval, +30 increase from baseline, +26 mile increase from previous additiveArchoil AR6500 Diesel Treatment, 564 miles between regeneration interval, +180 mile increase from baseline, +150 mile increase from previous additiveArchoil AR6400-D Diesel Fuel System Cleaner, 462 miles between regeneration interval, +78 mile increase from baseline, -102 mile decrease from previous additive Archoil AR6500.Liqui Moly Pro-Line Diesel Cleaner, 444 miles between regeneration interval, +60 mile increase from baseline, -18 mile decrease from previous additive Archoil AR6400-DLiqui Moly Diesel Particulate Filter Protector, 625 miles between regeneration interval, +241 mile increase from baseline, +181 increase from previous additive Liqui Moly Pro-Line Diesel CleanerLiqui Moly Super Diesel Additive, 533 miles between regeneration interval, +149 mile increase from baseline, -92 mile decrease from previous additive Liqui Moly Diesel Particulate Filter ProtectorDura Lube Severe Catalytic and Exhaust Treatment, 282 miles between regeneration interval, -102 mile decrease from baseline, -251 mile decrease from previous additive Liqui Moly Super Diesel AdditiveAC Delco Fuel System Treatment Plus-Diesel, 425 miles between regeneration interval, +41 mile increase from baseline, +143 mile increase from previous additive Dura Lube Severe Catalytic and Exhaust TreatmentDura Lube Diesel DPF and Catalytic Treatment, 360 miles between regeneration interval, -24 mile decrease from baseline, -65 mile decrease from previous additive AC Delco Fuel System Treatment Plus-DieselStar Review Legend1 star: Made check engine light turn on or trigger error code(s)2 star: Causes no check engine warnings and no engine error codes. Mileage worsened or DPF regeneration intervals decreased in mileage. DPF regeneration process worsened.3 star: gained less than 50 miles in regen mileage interval (from baseline or previous additive), or slight increase in mpg.4 star: gained more than 50, but less than 100 miles in regen mileage interval (from baseline or previous additive), or +2 mpg increase5 star: gained more than 100 miles in regen mileage interval (from baseline or previous additive), or +3 mpg increase.