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Do engine treatments like Slick 50 really work?

Are any of these engine treatments worth the money at all like Slick 50 or any other type of product like this?
<br/> Thanks


  • edited February 2010
    No. They're all snake oil.

    If they were worth anything car manufacturers would specify their use.
  • edited February 2010
    Not in my opinion. Appropriate oil changes is all you need. Are you trying to solve a problem?
  • edited February 2010
    I would say no, but advise you to search for "Slick 50" and read supporting documents there.

    About 20 years ago, I decided Slick 50 sounded like a good idea, so I put some into a brand new Jetta GLI, with no ill-effects. I remember it was expensive, and at the time, I think it had teflon in it. Teflon in a crankcase is a bad idea; it can clog journals quickly, and do the opposite of reducing wear. Luckily, that problem never happened for me.

    Just read your owner's manual and follow the recommendations there. That's your best course of action. If it says "5W-20 synthetic, service grade SM", use that. The manual for my 96 Maxima specifically recommends 5W-30, non-synthetic oil, so that's what I use.

    Some manuals even go so far as to specify using no additives.
  • edited February 2010
    My Dodge truck and Mazda car now have over 100K miles and was looking more in the coming years if this would help extend the life of my engine or some product. I do change oil at 3K miles. So far no engine issues.
    Maybe if it not broke don't try to fix it.

  • edited February 2010
    The chances of your car dying a premature death because you didn't use any oil additives are so slim, I wouldn't worry about it. How often you change your oil and whether you use the proper oil are a much bigger factors.

    It is much more likely your automatic transmission will fail before your engine. If you are looking for a way to extend the life of your car, I would say most people know to change the oil on a regular basis, so I would look at the cooling system and the transmission. Having the coolant changed every two years and having your transmission properly serviced every 30,000 miles could help your cars last longer. If you have an automatic transmission, that would mean draining the fluid, dropping the pan, and cleaning the filter, not just draining and refilling, and not having the fluid flushed.
  • edited February 2010
    Most of the claims made on the sides of additive cans can not be proven one way or the other. For sure, the most important factor is keeping your engine full of clean oil. If your are 2 quarts low and you haven't changed your oil in 8000 miles, additives have nothing to offer...If your crankcase is full of clean oil, they have nothing to offer either.

    In certain situations, special-purpose products can provide a benefit..Highly solvent "engine flushes", stop-leaks, products that reduce oil burning, these can have a place as cars drift into their "sunset years"...
  • edited February 2010
    If you're changing every 3000 miles, I will claim that there is no additive that will add one mile to your engine's life, as far as wear is concerned. Do like Whitey says, focus on the tranny and brakes and you'll see 200k.
  • edited February 2010
    My Dodge truck and Mazda car now have over 100K miles and was looking more in the coming years if this would help extend the life of my engine or some product.

    Myself and many others here have had cars last well past 300k miles WITHOUT any of those products. So you expecting Slick-50 make the car last 500k miles???
  • edited February 2010
    Slick 50 worked as designed. It made a lot of money for the manufacturer and sorry to say damaged a lot of engines.

    If it not broke Don't fix it. If it is broke, Slick 50 will not fix it.
  • edited February 2010
    There is no such thing as magic anything. Some of the friction reducing "magic in a bottle" stuff will do something. Many are chlorinated paraffins. What they do (maybe) is save you $6 for $25 in costs. Most are correct here in that the best thing that they do is clean your wallet.

    There are additives that can be used to correct given issues, but without issue, there's no reason to use them. One product that I used every 75k or so is Auto-Rx. It will clean long term deposits out of the ring area. Every used car purchased gets a treatment and all owned from new cars get it somewhere around 75k-80k. It's also good for problematic engines or one acquired in an unclean state. The good thing about it is that it's composed of 3 esters and isn't $0.25 worth of solvent and $15 worth of marketing and advertising.
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