Reviewed by Ryan O (Minneapolis, MN) — Apr 17, 2013 8:20 PM

They have improved my gas by 1-2 MPG!

Reviewed by Michael M (ROUND ROCK, TX) Reviewed for a 1999 Chrysler LHS — Mar 21, 2013 8:17 AM

Car was running leaner, no loss in power and I noticed my gas milage go up by at least 3mpg.

Reviewed by gabe L (boise, ID) Reviewed for a 2006 Kia Sportage — Feb 19, 2013 10:57 AM

This is the best plug you can get for seeing an improvement in power and gas consumption. I run them in all my cars/suvs.

Reviewed by Luiz D (WEST PALM BEACH, FL) Reviewed for a 2010 Suzuki Kizashi — Feb 05, 2013 8:44 PM

These spark plugs function fairly well in a city situation, but in the highway, however, they are abysmal. My MPG dropped from 29.1 to 27.2 on highway, but as soon as I leave the highway it usually rises to about 27.4. The instructions that came with it are very easy to follow and installation is a breeze (gaping required). One thing that you will read on some of the reviews is that there is a RPM drop when in idle, and this is true, in idle my RPM was around 500 as oppose to the typical 700.

Reviewed by Steven B (WEIRTON, WV) Reviewed for a 2008 Hummer H2 — Feb 01, 2013 9:34 PM

Replaced my stock plugs with the Pulstar plugs along with a set of Accel Ceramic Plug wires. Noticed a slight increase in power and picked up about 1 mpg.

Reviewed by Logan B (PHOENIX, AZ) — Jan 11, 2013 5:16 AM

I installed 8 of these myself in an older Lexus LS, and on paper I reduced my emissions by about 50%. I didn't believe it, but there you go. I had it tested before and after in Arizona. My car was amazingly built in the first place, but somehow got even smoother after putting these pulse plugs in. I don't know about longevity yet as I haven't aged enough. Highly recommended so far.

Reviewed by Elmer G (Port Byron, IL) Reviewed for a 2008 Honda CR-V — Nov 20, 2012 7:46 PM

Saw an immediate improvement of 1 to 2 mpg; over the next few thousand miles, mileage improved another 1 to 2 mpg. I was amazed - I guess I thought a spark plug is a spark plug. Not so! Get these, they are as advertised.

Reviewed by James C (BRIDGEPORT, CT) Reviewed for a 1999 Land Rover Range Rover — Oct 08, 2012 8:27 AM

This is a great mod! A no-brainer for the $. Good conventional plgs cost about the same! My 99 Range Rover 4.6 is getting 25-30% more miles per tank. 3/4+ mpg. That is considerable and will pay for itself by my 3rd refill. BTW, they're rated for 100,000+ miles. I usually have to change plgs every 15-20k in this harsh New Eng CT climate. Dont forget to discount ur battery n use boot deelectro grease to insulate xtra spark into capacitor. -j

Reviewed by Tony M (Grantsville, UT) Reviewed for a 2006 Pontiac G6 — Oct 05, 2012 5:17 PM

I upgraded to these from stock, and immediately I could see a difference with the way my engine runs. Gas consumption hasn't been dramatic, but improved a little. Glad I got these.

Reviewed by Edmundo G (San Francisco, CA) Reviewed for a 2006 BMW X3 — Oct 04, 2012 10:06 AM

after I istallled my Eco-MPG spark plugs on my car now I can see the big diference in miles per gallon , defenely I'm saving more money on gas . I really recomended