Engine Additives That Work??

Well I apologoize I didnt exactly know how to categorize this question. Are there any good engine additives out there that make a difference? I have used Sea-Foam in my 93 Suburban, in the gas tank and up the brake booster line and noticed a BIG difference (yes a positive one). Just wondering if any of you have used other stuff that works, like oil leak stoppers, or head gasket repair, or just good liquid additives that are added into the crankcase, or gas tank, or up a vacuum tube, or in the tranny, or anywhere really? Always wondered about those products that "repair" your engine by simply pouring it into the thing. Thanks for interest.

Iv found 4 really, really good additives that Iv put in all my cars.
They seem to make a huge difference to how they run, and have certainly let me get many thousands of kms out of my cars that wouldn't have got if I had used something else.

They are:
Oil
Petrol
Water
antifreeze/Anti corrosion.



Keep your car well tuned and looked after and its all you will ever need.

The only one I've ever found that vaguely does what it says is a product called Restore. Its supposed to magically fill the scratches and wear in the cylinder walls and improve ring seal and reduce oil consumption.

It doesn't work anywhere near what they claim, but I noticed reduced oil consumption and a compression test before and after showed a slight improvement.

Question is, what did it do to the rest of the engine? :)

Question is, what did it do to the rest of the engine? :)

that is the definite question. Having been into some engines after additives have been added and seen the very ugly results, I have no desire to experiment.

But i have used seafoam (which is glorified diesel fuel, I think) in engines that had carbon build up (ticking lifters, burning oil, etc) with some marginal success....but that has some inherent danger too, thins the oil.

Bottom line, there's either disadvantages they don't list, or if there's no disadvantages, there's probably not much of an advantage either

seafoam is mostly water, and isopropyl alcohol (rubbing alcohol) . it has pale oil, and naptha too. whatever that is

I've seen the old formula STP totally block up the oil pump screen on a couple of lunched motors. I used to swear by Alemite CD2 for oil burning in old cars and trucks, I'm not sure if they still make it.

Bob