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Discussion Starter · #1 ·
Car has 25,000 miles and I only run 93 top tier gasoline. Last 2 years has been Shell. No issues with performance.
First image is the cylinder before treatment. I was honestly surprised by the amount of buildup since I run 93 octane top tier gas.

Liquid Fluid Recipe Gas Circle


I ran 1 tank with half a bottle of the Lucas Deep clean fuel treatment, and then pulled the plugs and stuck the camera in there again. Wow, you can read the writing on the piston!
Atmosphere Automotive lighting Liquid Musical instrument Astronomical object


I guess I'll start running a tank of Lucas through at each oil change.

Liquid Automotive tire Bottle Fluid Bottle cap


I'm sure some brands are slightly better than others, and some are snake oil, but I use what I like and figured I'd share the before and after pics.
 

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I think that's the best result I've ever seen for a fuel system additive
 
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Discussion Starter · #6 ·
That's impressive. Anything known about long term effects on O2 sensors and cats?
According to Lucas it's O2 sensor safe.
"Lucas Deep Clean is blended with an exclusive Lucas additive package and specific carrier fluid that contains no diesel fuel, kerosene or anything else that can be harmful or useless to an engine.
This product is low odor, alcohol free and is oxygen sensor safe"


I've used Lucas products for 20 years in a lot of engines, and have always been happy with them.
 
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Amazing result...the proof, as they say, is in the pudding. You got a nice desert. I've been using BG44K for decades and always felt results, but without visual proof. Good job. I'll be switching to Lucas and saving some $$$ Thanks for the info. It's so hard to separate the "snake oil" on the auto parts store shelf from the real deal...
 

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Lucas makes good stuff. I have used it several times and never had a problem with an O2 sensor.
 
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Discussion Starter · #12 ·
@N2Deep74 would you mind posting pics of the process,
I'm very interested in this product just not familiar with using additives of this kind.
Certainly! This type of fuel treatment is simple to use. You just add it to the tank when you fill up with gas. It says on the bottle how many gallons the bottle will treat. I used half the large bottle for a full tank.
 

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Discussion Starter · #15 ·
At what point - miles - does one need to use a fuel cleaner? My 124 has about 25K
Lots of variables to consider including type of gas, tune, driving style, etc. The only way you can really tell it needs it is to look at each cylinder.
Instead, my plan is to run a tank with Lucas through it each time I have the oil changed.
 

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2018 Abarth 124 Spider, Mare Blue / Nero Abarth Leather, Brembo's, Record Monza, Automatic
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At what point - miles - does one need to use a fuel cleaner? My 124 has about 25K
Hi, having breeched this subject with the instructors (many of which are engineers) at manufacturers technical schools ( GM, BMW, and others) the general rule of thumb is to use a fuel system / top engine cleaner every 15,000 miles, and always use Top Tier fuel. If the car is only used for short trips (which results in quicker carbon buildup), hence not running fully warmed up for longer periods, you might want to shorten the frequency to every 12,000 mi. The reason the engineers give for not using the cleaners more frequently is that they contain ingredients which 'may' - and some brands definitely do - cause certain fuel pump, injector, pressure regulator and pressure sensor parts ( like vanes, diaphragms, seals) to deteriorate. So, be careful here as to what brand you buy and how often you use it. FWIW (and, yes, minds are hard to change) most manufacturers recommend or allow Chevron's Techron. Some even sell Techron in the manufacturers branded bottle. The reasons include O2 sensor safe, fuel system parts compatibility when used per the above guidelines, and it works. Cleaners with octane boosters/enhancers are definitely not recommended. Best, s
 
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