I bought the Marine grade at my local Nappa Auto parts store. It is suppose to do a better job for long term storage and also do a better job at keeping the ethanol from separating.

 

they say its good for 2 years once open

 

Sea Foam vs Staybil. It has been our experiance that the SeaFoam product is by far a much superior protection. Not heard of it, neither had we. A lawn mower mechinic told us that in the spring when the bulk of his business was getting mowers back up and running, he would dump Sea Foam in to the gas tank and let it sit over night. The next day he would come in and start the majority of them right up after sitting all winter.

We have used this product on the fire department for all of the chain saws, fans, gas opperated tools as well as in our diesel rigs. This is the only product we have found that really does what it claims on the can. And no it is not new...the company has been around since the 1940's. Most farmers will tell you how well this product work in gas or diesel motors, we use it in everything. We don't sell it but would deffinatly recommend it.

 

You'll love this: www.superfuelsaver.com.