Lucas Oil10512 Deep Clean Fuel System Cleaner - 16 Ounce

Work good I usually just put a bottle of it every time I change the oil just for preventative maintenance

Just got three bottles of the Lucas Deep Clean last week and am using it in three different Toyotas. A Venza, a Corolla and a 2004 Tundra. It is working great in all 3 vehicles. I noticed the difference in the Tundra during the first 20 miles or so. The throttle response is better, the idle is smoother, and it is too soon to tell if this product is improving the gas mileage at all. This is the first time I have used the Deep Clean product from Lucas though I have used the Upper Cylinder Lubricant product fuel system treatment. The Deep Clean is much more of a 'standard' cleaner.This cleaner is high in PEA detergent which is the best substance for complete fuel system cleaning, and the Deep Clean seems to have more of it than Techron Concentrate Plus which is another great product. The Lucas Deep Clean is cheaper than the Techron too. Another thing I like is that the Deep Clean works on up to 30 gallons of gasoline, whereas the Techron concentrate only works with up to 20 gallons of gasoline. That extra 10 gallons of cleaning power meas that one bottle treats a full tank of gas in the Tundra that has a 26 gallon fuel tank. The three bottles did not leak which is good. If you compare it to Techron or to Redline SL-1 the Lucas product is quite a bit cheaper and seems more cost effective. I am not knocking the other 2 products they are all good fuel system cleaners.

I used this in my Jag when it didn't pass the smog - plus I changed the $30 oxygen sensor. The NOX was too high - meaning it was running too hot (you have to get hot to create nitrogen oxide.)I read on a lot of Jag forums, that this is a good product - and I noticed right away that my gas mileage jumped way up - to 15-16, from around 12 mpg.I just put a can of this in my old Dodge Dakota truck. I have to drive it down to the smog place - it's a 20 mile drive so it will get good and warm making the trip - I am hoping this will help it pass. It has been passing in past years, but just barely.I take it to a place that does the "sniff" test with the instrument in the exhaust pipe, rather than the places that want me to put on a hugely expensive catalytic converted that would clean up anything that came through the pipe. LOL

In my case, it's difficult to judge whether or not this cleaner is doing its job. I'm using it largely as a preventive measure; I didn't have any engine problems to begin with. I started using this in my car at around 15,000 miles and I am now at about 35,000. Every 3,000 miles, I add it right before filling my gas tank. I have no issues as far as I can tell: the car still runs as smoothly as the day I got it, technicians have not noticed any problems during routine maintenance so far, and emissions inspections are fine. I'm not sure what else to look out for.I do notice two things about the car when my tank contains this cleaner: slight improvement in gas mileage and smoother idling. However, once I deplete the gas tank and do a fill-up with only gasoline and no Lucas Oil cleaner, the MPG and idling benefits disappear and the car is back to normal. I don't think it would be cost-efficient to add a bottle of this cleaner to every tank full of gas in order to obtain the MPG increase.

Priced right and works

Added this to a full tank of gas and drove for 20 minutes before pulling into a smog station for certification. Pass.Do this every for certification prep.

I have been using lucas products for years and have never been disappointed.

Best fuel system cleaner IMHO. Really does clean fuel injectors as you drive. One treated tankful increased my gas mileage. Also, get some electronic parts cleaner and clean your mass airflow sensor on the air intake. You'll be glad you did.