Thanks for the question, Richard! Yes, you can use Sea Foam in your Packard. It’s made with petroleum ingredients that won’t harm anything and work well to clean fuel residues and varnish.

Here are a few recommendations on how to use it:

• Sea Foam Motor Treatment in fuel. I like to wait until the tank is low (2-4 gallons), add the whole 16 oz can, and then drive for at least 10-20 miles before refueling. It’s safe to add a high concentration like that and it works very well for cleaning fuel residues and deposits.
• Sea Foam Motor Treatment in oil. Add 1 ounce of Sea Foam per quart of oil in the crankcase. We recommend adding it 100-300 miles before your next oil change. That gives the Sea Foam enough time to circulate and clean, and it allows all the reliquefied oil residues to be drained away with the old oil.

If it’s sitting for any length of time, you can add Sea Foam to every tank to prevent the fuel from degrading and gum and varnish from forming while it’s in storage.

Thanks for the question!

You don’t have to wait until your tank is that low, but it’s the most effective way to get a strong cleaning concentration. When there are only a couple gallons of fuel in the tank, adding a full can of Sea Foam creates a higher ratio of treatment to fuel, so it will clean faster and better than if you were to add a can to a larger volume of fuel.

That said, you can add Sea Foam to a full tank at any time—it will still work to clean and lubricate, just at a lower concentration. Many people add a full can to a full tank as part of regular  preventative maintenance.

So the short answer: use it whenever it’s convenient, but adding it when the tank is low gives the strongest cleaning results.

Thanks for the question!

The short answer is yes, Sea Foam can be added to two-year-old gas. As you run the vehicle, it’ll work to clean any fuel residues that formed while it sat.

Note: Sea Foam won’t “restore” old fuel. It will reliquefy any fuel residues or deposits that formed while the vehicle sat, and prevent the fuel from degrading any further.

Here are a few additional thoughts. There are two things you’ll want to do with your vehicle: 1) use up the old fuel (or drain it), and 2) clean up the fuel system from any fuel residues and varnish that formed while the vehicle was sitting.

Two-year-old fuel should start up just fine. If you’re going to be using the vehicle frequently, drive it until you’re at about ¼ tank of gas, add an entire 16 oz can of High Mileage, and drive it until almost empty before refueling with fresh fuel. If you’re not going to be using it in the near future, drain the old fuel, add a can of High Mileage with 2-4 gallons of fresh gas, and drive it until almost empty.

The high concentration of High Mileage will do a good (and fast) job cleaning.

Adding Sea Foam to each tank wouldn’t hurt. The Sea Foam would prevent fuel residues and varnish from forming, which will keep your generator free from problems that residue and varnish causes (hard starts, rough performance, etc.). Add at least 1 ounce of Sea Foam per gallon of fuel to every tank. That would be a good addition to your preventative maintenance routine. It’s a good idea to run it monthly as well.

Thanks for the question, Bob.

Sea Foam will clean any residues and varnish from the old fuel. It’s best practice to drain any old fuel (or run it to use it up), and then add 16 oz of fresh gas with 8 oz of Sea Foam (or whatever amount of fuel you’d like with a 2:1 ratio). That will create a strong cleaning concentration and work very well to clean up the entire fuel system. After that, add 1 ounce of Sea Foam per gallon of fuel to prevent it from degrading when it’s sitting.