Is seafoam safe? Options

[ILoveMySilly97]

I've heard that seafoam is a really good and easy way to clean the car up a bit. When I go look at videos and ask people they tell me pour it into the Oil crank case, Brake booster, and fuel tank. It sounds stupid to pour something that doesn't belong into the brake booster and espescially the crank case. I just want to know if anyone has ever used it and does it really work or is it just stupid.

[RabidTRD]

I've always done the 1/3 in the oil, 1/3 in the tank and 1/3 through the vac lines via brake booster vac hose. I do it before an oil change once a year and the engine stays clean.

I pour 1/3 into a laundry detergent cap (roughly 1/3 of the bottle fits perfect) and gently ease the hose into the cap. You find the sweet spot that allows for the engine to suck but not stall and that way it's safely burning. If you rev the engine, you risk the chance of sucking too much in. Once the cap is sucked dry, put the hose back on the brake booster and shut the engine off. Let it sit for 15 mins and then turn it on again. This allows the seafoam to do its job inside the vacuum system. After turning the car on, rev the engine to 2k rpm and hold it there for a bit. Then drive around the neighborhood to let the rest burn off.

Running it in the vacuum lines or crank case means you want to change your oil within 150 miles. It thins yor oil and isn't too good for extended use. If you want something to add to the oil that will work well extendedly, use Marvel Mystery Oil. It'll clean but be safe.