My 2005 Silverado had spark knock from almost the day I brought it home. I only drive 12 miles daily back and forth to work. After using the AR6400-G for less than a month, NO more spark knock. Quality products that deliver results. Thanks Archoil.
I have a 23yr old Toyota RAV4. I have had 2 other older Toyota's as well. They all seemed to drive
"rough", as if the engine was grinding .and needed lubrication though the oil and water were fine. They all have developed
EGR valve problems. I had the engine light go on, coded to EGR
Valve. I had some Catyclean because I had just replaced catalytic converter 4 mo. before,
and because it said that it could also clean up EGR deposits I put that in while I waited for my Archoil order. I then used the
AR6400 and started regularly using the AR6200 fuel treatment.
The check engine light went off.
I get noticebly better gas mileage and the car runs smooth, like new, and has more power, especially on acceleration.
I am a convert- I will NEVER fill up a tank without AR6200, and will use the AR6400 at regular intervals to keep my engine running clean. Worth every penny!
Car starts quicker now and the slight hesitation i had before the trans would kick down is gone. Not sure if it was necessary, but i used this when i filled up with ethanol free gas from Shell. I used a tank of ethanol free gas prior to adding this and filling to make sure i got out as much ethanol from my tank as possible. Will definitely keep using this product and other Archoil products. I just wish it was available over the counter but i don't mind ordering something if it works like this does.
Hard to believe this product improved my my P38 Range Rover by 1.8 miles of city driving. Will evaluate mileage gain when
I get her on the highway, sure it will be more mileage gain.
Thanks for your great product '