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post #1 of 12 (permalink) Old 11-10-2010, 09:56 PM Thread Starter
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How To Seafoam Your Car

Just FYI... This is what i do every other oil change. i use full synthetic oil. i am not responsible in anyway for anything that happens to your car. this is just to show what i do.

about 100mi before i change my oil i fill up my tank and add about 12oz of seafoam to my gas tank prior to filling it up. this allows the seafoam to mix into the gas better when pumping it.

then i add about 8oz to my oil. i just take off the oil cap and pour it in.

finally i take about another 8oz and add to my vaccum line... i will post a pic later of where the line is located on my LT model. you must keep the rpms higher than idle while adding it to the vacuum line. it is easier if you have someone else there that can hold the pedal at about 2k. if not the car will stall and you will have to start the car and attempt to finish. the first time i did this myself the car stalled like 4 times. the second time i got better at it by myself. if you are doing it by yourself just do a little at a time and be patient. the car is going to seem like it will stall and it might. its ok it will start up again. any questions just let me know. will post a pic later...

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post #2 of 12 (permalink) Old 04-03-2011, 08:13 PM
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IM driving a 2005 LS 2.2 and just put some seafoam in my gas tank and will be changing the oil this coming weekend. Would the brake booster hose be best for adding the seafoam?

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post #3 of 12 (permalink) Old 04-04-2011, 03:35 AM
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You might try gasoline with detergent additives. I almost always use Shell but there's a list of brands out there somewhere that include detergent additives in their recipes.

Detergents help to keep carbon from building up on intake and exhaust valves, the cylinder head and in the combustion chamber. Once you get carbon buildup in these areas it's very hard to get rid of it.

Detergent additives help to prevent knocking and sluggish cold morning starts and can improve your gas mileage.

They're well worth the few extra pennies per gallon IMO.

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post #4 of 12 (permalink) Old 05-27-2011, 11:08 PM
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Originally Posted by keegs View Post
You might try gasoline with detergent additives. I almost always use Shell but there's a list of brands out there somewhere that include detergent additives in their recipes.

Detergents help to keep carbon from building up on intake and exhaust valves, the cylinder head and in the combustion chamber. Once you get carbon buildup in these areas it's very hard to get rid of it.

Detergent additives help to prevent knocking and sluggish cold morning starts and can improve your gas mileage.

They're well worth the few extra pennies per gallon IMO.
Wow, sounds like you're reading that from a Shell V power commercial.
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post #5 of 12 (permalink) Old 05-30-2011, 11:49 AM
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Few thoughts about seafoam:

Don't throw it in your oil. Oil additives are always ill-advised in modern oils that already have detergent packages in them from the oil company. Putting the wrong additives in can severely change the properties of the oil, usually for the worse (For example: Lucas has a bad tendency to cause foaming).

Also, Generally it is considered good practice to change the spark plugs and oil after doing a seafoam run. It isn't meant to be something you do that often.


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post #6 of 12 (permalink) Old 06-02-2011, 10:46 AM
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If it wasn't safe to do, they wouldn't put those same exact instructions on the can. Your suppose to put SOME(4 oz. I believe) in the crankcase 24 hrs before you plan on changing your oil. And yes, this is something you SHOULDN'T have to use @ every oil change......
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post #7 of 12 (permalink) Old 06-04-2011, 07:11 AM
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When I used to own a Nissan Xterra, I did the Seafoam thing exactly like Firebalt said, and I NEVER saw any negative changes. it works really well and improves gas mileage a lot. After you put the Seafoam in your crankcase, the most you should drive is about 50-60 km. Anymore than that and you start to hurt your engine. You just need to drive enough to get the Seafoam all through your engine a few times to clean it out. After that, definitely change your oil, and you'll see some awesome improvements. You also don't have to do it every 2 oil changes, you can if you want, but it's not necessary. Maybe every 5 or so. It takes a while to build up the crap that Seafoam removes, so every 5 sounds like a good amount of time between applications. Happy Seafoaming!!
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post #8 of 12 (permalink) Old 06-05-2011, 10:49 AM
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You can also add it to your oil, mainly to your gas tank, at which point let your car idle for a few minutes then drain the oil, put new oil in and change spark plugs. It says right on the can.

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post #9 of 12 (permalink) Old 06-05-2011, 01:24 PM
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I ended up doing this on my car a little while ago and it went smoothly. I did the whole gas tank, oil, and vacuum line trifecta. I use royal purple and top tier gas usually, so really I didnt think I had too much to clean out but figured what the hell.

I had no problems and things run great to this day. I got a little smoke upon start up after letting it soak in for a few, but again I didnt think my engine was too dirty to begin with. My brother has an Ion with a 2.4 engine he doesnt take care of and I was thinking of running this through it.

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post #10 of 12 (permalink) Old 06-05-2011, 02:45 PM
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Wow, sounds like you're reading that from a Shell V power commercial.
Do some checking on it and you'll find that the motivation behind the development of tier one gasoline was driven by the automakers. There are many retailers (the number has grown over the years) who offer it.

Anecdotally, it seems evident to me that running tier one gas reduces engine knocking which can be caused by carbon buiildup in the combustion chamber.

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