Seafoam into the intake works.

A local tranny guy that builds race trannies swears by lube guard to keep temps down among other benefits. I don't have any personal experience.

David Vizard an author who has written many automotive books recommends TK7. I again have no personal experience.

My father was using some lucas additive to the 350 in our '94 blazer (fullsize) and that truck is at 320K with original engine and tranny. It runs amazing too. I don't know if thats because of the additive or because TBI chevys are next to indestructible.

Some additives "work" but are overpriced for what they do. Lucas tranny additive will swell the tranny seals so a tranny with bad seals will work for a while but I have heard that adding brake fluid will so the same thing.

 

most additives really dont work just take care of your sh*t and it could last a good while.

 

Yeah it seems that most of the stuff in stores (additives) are pretty hokey. They look cool and sound promising but who really knows. The general consensus I'm getting is just do regular maintenance and things should last a good long time....

 

I usually just add a bottle of the store brand injector cleaner every other tank. It feels like it runs a bit better, but thats probably just in my mind. Either way, I'm not too bummed with spending 2 bucks on the stuff.

 

What does sea foam ACTUALLY DO once its inside the manifold? I'm very skeptical about putting anything into a motor like that. Does it actually enter the combustion chamber? Can't that fowl plugs?

 

It cleans off all the carbon. Does the same in the combustion chamber. Thats why you get the smoke. I just Seafoamed my Snapper push mower and the spark plug is much cleaner than it was before. If it does foul the plugs, replace them. Plugs are cheap.

 

Hmmmmm ok. What line is used on a 2000 5.9? Also would it be bad to use it if the plenum is blown?

One more thing. How did you put it in your mower? My rider could use a good cleaning

 

I don't put anything in the gas in my vehicles on a per tankful basis because gas manufacturers are already putting blends of stuff in the gas like detergents, etc.

I do drop a bottle of some type of system/fuel injector cleaner in the tank at oil change time. Chevron's Techron is a good product, as are Lucas products and good old SeaFoam.

I do use SeaFoam on a regular basis in the gas I use for my yard equipment, be it mower, weed wackers, chain saws, etc. It not only keeps these carb engines clean, but for seldom used engines that can sit for a while, SeaFoam is an excellent fuel stabilizer. I put it in at a ratio of 1 oz. per gallon as soon as I get home from filling the gas can...

 

I suppose no one uses water to clean the carbon out any more.
Years ago we just filled a soda bottle with water and let it dribble into the carb while keeping the motor revved up.
It worked but the chemicals they use now days may do it better and quicker.

 

my truck has ALWAYS bad mobile one fully synthetic truck oil in it. Ever since new it had it in it. When I did my motor rebuild at 110,000MI I could not find a lick of carbon build up in it nor could I find any sludge. I belive in it 110% now and that was just due to regular matinance. As for cleaning additives I love seafoam, I swear by it. It is used in all lawn equipment and the snowmobile when in storage. The only time it was ever used in my Ram was after the truck had been sitting for awhile during the rebuild process, to stabilize the fuel.