+1

BG products are twice as much as seafoam but my mechanic stands by it. I think my last purchase was around $22 a can

 

yep about 22 a can and your dealer will have it.

 

thanks everyone for the input

 

Seafoam - If you add it to the intake manifold, it will clean the intake passages. If you do this method, only add little by little slowly or else you might hydrolock the engine. If you add it in the gas tank, it can be a gas stabalizer and it will clean the injectors.

 

[QUOTE=knshro13;6965829


i recommend using redline is really good

 

Theres no need to do an oil change if you run seafoam through the injectors, the spark plugs will ignite all that seafoam. I would rather see you do both, through the gas tank and pop off the vacuum plug on the intake manifold and with a vacuum tube let it sip seafoam out of a cup while the engine is running, you will want to almost choke it emptying half a bottle and take a 30 min break and repeat to finish the rest of the bottle. It would be a good time to remove the throttle body (easy, undo 4 bolts) and clean it inside and out with wd40 and a rag

 

Scotty Kilmer says buy a cheap bore scope. Take a look. You probably don't need a cleaning like that. You may benefit from cleaning certain parts, like the mass airflow sensor (MAF), throttle body, etc., but I would do them directly.

These are D4S engines

 

Having had several cars with around 300k miles, I’ve found using Top Tier gas the best option. The high detergents will do the job better than the controversial/questionable Seafoam, Techron, BG44, etc. additives. Many car manufacturers discourage additives.

 

Where or which of those hoses is the vacuum plug on the intake manifold? Can u please take a photo which is it. Planning to do this on my 2008 lexus gs 350, havent done this since i got my car, planning to do this every other fill up of my gas ...

 

Once you lift up the engine cover, you will see the plugged vaccum line on the passenger side rear corner.

Look at the 2nd photo its on the left side, you cant miss it!
https://www.ebay.com/itm/20370678520...0AAOSw085hmAiT

 

Oh that one? Was wondering why is that blocked... so that is the vacuum thing... makes it more easy to put sea foam then. Thank you!

 

I popped open my hood just to double check and that is not the port, that what you highlighted is the hose for the brake booster. You can use that, but what I use is the empty plug thats behind the throttle body flange.

 

Aw... i did it on that highlighted photo, and i got tons of white grayish smoke...damn.

Ill looked at that empty port behind the throttle body u are saying, i guess i have to do it again on my next day off... is it ok to drive my car with that damn smoke... looks like my car was on fire when i was driving . lmao.