Featured Engine with approx. 100K - increased my Miles per gallon by 13% on

Using Sea Foam increased my mpg by 13% from 42.5 approximately to 48. I just used the pre-oil change procedure on the can. For the full story go to Increasing the MPG and the Life of a Gasoline Car with fewer major expenses.

Also if you have a major oil burn problem there is a more direct approach of applying 100% Sea Foam directly to the rings. This method this is detailed here:
Burning oil problems due to dirty piston rings (oil & compression) and prevent catalytic converter problems and keep the oil cleaner for a longer engine life

This method works VERY WELL BUT YOU DO HAVE TO CLEAN OUT THE SPARK PLUG ACCESSES PORTS FIRST OR YOU WILL GET DIRT IN THE ENGINE.

There is also Sea Foam spray with can be directly sprayed into the air intake. I have not tried that yet. It is easier than than the above.