Yup, helped with my high millage M3!Sucking Seafoam into your vacuum line serves to clean deposits off your intake valves. This does have dramatic results in high mileage engines that get the treatment for the first time. If you've ever disassembled the head of a high mileage engine, you immediately know why. Intake valve deposits get BIG and block a great percentage of the flow volume through the port, not to mention disrupting the flow that does get past. Ventil Sauber is another good product for this.
Get the engine hot. Stick your pinched vacuum hose in the can. Start up and unpinch the line to allow the Seafoam to gradually be sucked up. Shut off the engine and let it soak into the deposits for a bit. Restart and observe moderate smoke and think "that's not so bad". Go drive it up the road to clear things out and be amazed at the smoke screen. Yes, it makes a BIG difference to engines with obstructed intake ports.
Beware, this treatment produces HUMONGOUS amounts of thick white smoke from the exhaust when done right. Your neighbors will surely take notice, though they may not actually be able to see the vehicle it's coming from due to the smoke screen. I did this to a high mileage BMW V-12 and it took a really long time for the atmospheric disturbance to dissipate. Everybody in the neighborhood came out to see what was up
Waste of money, and unnecessary if you use a quality fuel in the first place.Hi guys are they bad for the Maserati?? Octane boosters, Fuel injector cleaner etc.. Let me know your experiences and what you have heard.