I have a 2002 Volvo s40 that I want to use Sea Foam on. I have few questions. The first is do you really put a portion (1/2 or 1/3 of the can) into the oil crankcase?

I mentioned doing that to some mechanics and they said no way do you do that. I do not know who to believe. What do I do?

Newport_j

 

I've heard a lot of people say it doesn't work, and some say that it does. Do tell how it works out for you.

 

i was recommended by alot of mechanics/friends not to...i just did the gas tank

 

Do you have sludge buildup? Why do you want use it?

The previous owner of my V50 was not too good about oil changes and it had some sludge. The car also seemed a little sluggish for a T5 but I needed wheels. I ran 1/2 a can of Seafoam in the crankcase and the other in the gas for about 500 miles before my oil change and there was good improvement. I repeated this for 3 more oil changes and the car runs great.

I still run some through once in a while but I am cautious about using it in the summer due to higher temperatures in my region.
Stan

 

volvo never recommend any kind of oil treatment in there engine. I would never put that in my car especially a s40

 

True! That is why I asked the OP why he is considering using it. I figured it was better to clean out the engine than to have the sludge. I also tried to minimize the time that the stuff was in the engine while giving it time to work.

The bigger question is... If Volvo and most auto manufacturers do not recommend using additives, why do their dealership service centers use them on a regular basis? I doubt that they are that harmful otherwise the service centers would not assume the risk for the little profit they make in charging for the additives.
Stan

 

just because they dont suggest to do it or dont say u need to doesnt mean its not helpful yes i used it because of sludge build up and i have several very talented mechanics that swear by it....im not the smartest guy about engines, but i can get around, i will tell you that alot of these mechanics no enough that i trust them....some use it every oil change some use it twice a year, i can gaurantee it will not hurt your car....look up just sea foam reviews...not from their site of course but just on yahoo or something...some of these guys swear by it so much they put it in their lawn mowers/weed trimmers/chainsaw or whatever else takes gas.....to each their own but i trust my guys so ill listen to them.

 

thats the most ridicoulous statement ive ever heard, chevy/ford/dodge/nissan/toyota all say to never lift your truck/never put over size tires on your truck/car never put a cold air intake system in your vehicle....do these things hurt your cars/trucks as well?? (NO)