Does adding fuel additives to your gas, like Additech at Walmart, really work?

Question:
I was buying gas at Walmart and was offered the option to purchase Additech fuel additive which was supposed to clean my engine and help me get better gas mileage. I was just wondering if this was true.

Answers:

What is the difference between w5-30 oil and w10-30 oil? And can they be mixed?

I started using Additech about a year ago. My car runs much more smoothly (less hesitation, better acceleration) and my gas lasts longer (about 1 day more on average). I would definitely recommend that you try it.

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How do you reset a side window on a mercedes 320clk after changing the battery?

it does work, but you probably will not see a difference. Your engine might though.

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How to remove paint?

Most fuel has a detergent to clean your engine already in it when you get it from the pump. So buying more from Walmart is just gilding the Lilly. Won't hurt, but likely won't help either.

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My shift handle wont go into R or D or P it just goes past them!?

Not really. Modern fuels have much better cleaners for fuel injectors than older fuels. Just stick with good brands.

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