SeaFoam

[thance]

I used sea foam for the first time about a week and half ago after reading this post. I poured about 6oz. in the vacuum hose on the intake. It stalled once while pouring, but started right back up.... make sure you pour slowly. Then I shut the engine off and waited 5 minutes before turning it back on like it says on the can. Lot's of heavy smoke as my 2010 Hemi has 48,000 miles and this was the first cleaning. I heard some of the house windows close abruptly.....not sure why.

Then I put about 16 oz. in the gas tank which was running pretty low, maybe 3 gallons. Drove for about 15-20 miles before filling the tank. I will put some in the crank case before the next oil change. I started this regime right after changing the oil.

So far, with the cleaning and removing the cargo carrier and crossbars, I am seeing 17.5 - 20 mpg with it sitting at 18.5 right now after a day and a half of regular driving.

Usually I see a range of 13.5 - 16.5 with about 15.3 being the average.

My only engine mods are a AEM intake and diable itune tuner currently in MPG mode. Both of these have been in place for a while.

The 18 cu-ft cargo box was put on right after performing the sea foam procedure but removed in the last couple of days (along with the cross-bars) allowing me to better see the millage results, though it was up slightly even with the box.

[Synthetic Advantage]

thance, you want to do the Seafoam cleaning as you did right before you change your oil, not right after. What it does it puts a ton of crap down into the oil. So now you have all that stuff in a fresh oil change. It is better to do the cleaning right before you change your oil so that it will get flushed out when you drain the engine oil.

[06JeepXKHEMI]

It should also be noted that many manufacturers have released statements and recommendations that people DO NOT do this on their engines. A reason why is when the chemical gets put in your oil its being mixed throughout the whole engine even though its "cleaning" alot of those deposit get stuck in places like the valve springs and cause catastrophic failure. I would never had anything to my oil thats just me, I use synthetics to keep my engine healthy and free of buildup. Just my opinion as my Dad is in the car business and has had numerous people come in with bad motors who have just done some type of internal cleaning..