Today my friend has a 2004 GMC Sierra 5.3 V8. We did a tune up and seafoamed his engine. It has 61k on the vehicle. His truck smoked alot after pouring in the seafoam. He drove it the instructed 30 miles and it stopped smoking completely after like 15miles. Now hear is my? We seafoamed my SS for the first time today with 84k on the clock. It smoked very little for like 5 seconds on the first startup and never smoked at all after that. Did we do something wrong or is there any explanation you guys know of as why his truck smoked a lot and my car smoked very little. Thanks guys.

 

Truck was dirtier?

 

did you let the seafoam settle inside the cylinders for 15 min?did you drive your car in the upper rpm's afterwards?

its not uncommon that you didnt get any smoke. it mean your engine is amazingly clean!

 

Yes I did wait the 15 minutes till I drove it. I reved it in the driveway to like 3krpms and held it there for 5-10 seconds. It didn't smoke anymore after the initial smoke on startup. I took it to the interstate and romped on it a little and still no smoke. My only explanation is that the trucks engine was dirtier but I don't know of any reason for that. We both use Mobil 1 and change at regular intervals...Oh well I guess that shows me that the LS1 is an amazingly efficient engine and it WAS touched by God so that HAS to be why there wasn't any black sin in it. :nod

 

haha i literally caused 2 cars to slam on their brakes with my smoke cloud coming out of my neighborhood, and a cop to flip a bitch and follow me, good thing I lost him!

 

Maybe your freinds PCV system needs a bit of a look at, that could be causing his to be dirtier. What fuels you burn and even your air filters will make a diff.

 

I use 93 octane and he uses 87 octane. My mods are in sig I do have a K&N filter while his is paper. The only mod he has is cat-back exhaust. I didn't know all this stuff contributed to a "dirty" engine. Oh well I have to be doing something right.