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Boating All Out

In article ,
says...

On Sat, 27 Apr 2013 13:19:15 -0400, iBoaterer
wrote:

In article ,
says...

They have seafoam just about anywhere that handles oil, auto parts or
boat stuff around here.
It is supposed to be some kind of miracle potion.
I have never had it fix anything.

It's purpose isn't to fix mechanical failures, so that's probably why
you haven't had it fix any.

This was hyped as some magic elixir that "Safely helps quiet noisy
lifters, helps remove fuel deposits and oil residue, helps smooth
rough idle". They say it cleans injectors, removes varnish and gum

I have not noticed it doing anything.

It is basically just light machine oil, naphtha and isopropanol that
they sell for $65 a gallon or more

I've used oil additives to clear sticky lifters on maybe 3-4 cars.
Seafoam on the last one. There's no doubt additives can work for that.
Dissolves varnish probably. Maybe kerosene would do the same, but it's
easier just buying a can of Seafoam or equivalent.
Except for that particular use, I consider them all snake oil.
And you should dump your oil and change your filter as soon as lifters
clear up. No telling what the stuff will do to gaskets and seals.
It's last resort stuff, usually on older or poorly maintained cars, but
I did free a noisy lifter with Seafoam on a fairly new car with about
80k miles on it. No idea why that lifter stuck, since the car was
regularly maintained.
The only gas additive I might use on a regular basis is Chevron Techron.
But I don't, and haven't suffered for it.
As you've said, drain and discard old gas. Or keep the tank topped off
when idle for long periods.