[XtremeRevolution]

I wouldn't recommend this in the crank case of your Cruze. It will thin your oil. If you are using a good oil, you shouldn't need to put anything in your crank case as it will not sludge up. Any group 3 "synthetic" will accomplish that.

I haven't heard of the spark plug fouling, but I also haven't ever checked my plugs after doing this, so I can only comment on it so much. Gained a lot of low end power on the few cars I did run it through.

 

[XtremeRevolution]

Well I guess I'm just a moron when it comes to seafoam. : ) Only man in the world that could F#@$ it up. :idiot:

Not really. On my old forum, we had one guy run it through his engine as instructed (pour it into the intake, let the car sit). He then went inside, had a few beers, had some lunch, and forgot about it. Remembered about the car 4 hours later.

He ended up needing a bunch of gaskets replaced.

 

[XtremeRevolution]

I do it similar to this. I always did 1/2 a can through the vacuum and 1/2 in the crank case. I let it sit for 15 minutes and drive it around for a while. I always do this when I need an oil change. Maybe drive the car for 100 miles then change the oil. Like Xtreme said it thins out your oil, usually makes it look like chocolate milk, so you don't want to drive too far or put too much stress on it before the oil change.

5 minutes of idling is more than enough to circulate it through the entire engine and clean out anything it is intended to clean out. I wouldn't drive on it for sure.

To be truthful though, use a synthetic good oil in the first place and change it at the recommended mileage and time interval and you won't need to run seafoam in your crankcase to begin with. I've seen the top end of a Jetta TDI engine with over 500k miles on it that used a synthetic at 10k mile intervals and never had the engine cleaned with anything else and looked nearly new.

The key is preventive maintenance. Treat your car well and you won't have to "fix" it later. Unfortunately, you cannot control the quality of your fuel so this will certainly help clean the injectors and intake, but you can control the quality of your oil.