LOL @ Harbor Freight stuff.
 

Notice that it was tested by an "EPA-accepted laboratory".

4 cylinder use only? Wtf?

Just use two if you have a V8

If you have 6 cyls, you have to buy 2 and then cut one in half and use the 1.5 units... then the other half can be used for a motorcycle or two lawn mowers or something.

Harbor Freight makes me lol with some of their things, although they still have some cool stuff.

I buy all kinds of stuff from Harbor Freight, usually tools, but sometimes other stuff, like magnets.

I just love to laugh at some of the stuff they're selling... and it's not like they're selling it because they know it's worth being sold... they're just following a business model of selling what people will buy.

heres one I bet really might work Sutticar Fuel Saver Kit, Model# Sutticar0001 | Fuel Savers | Northern Tool + Equipment

That actually probably would work, based on the same principal as using a heavier spring on the throttle.

- Harbor Freight Tools - Quality Tools at the Lowest Prices - AC current and DC voltage. Well, it's almost useful, and it's only $10. Kind of like their 50W solar panels.

I love harbor freight, but they certainly do sell things that won't do what most customers expect.

I bought a set of solar LED lights in glass rocks.. we use them for lights in the bedroom, and once a week, they go outside to be charged. We went almost all month without charging them last month, out of sheer laziness. At night, they provide plenty of light to get around in the bedroom.

They also make nice ambient light when you're sitting in the living room watching TV or something, as well.