157 Premium Octane Boost - 12 oz., (Pack of 12)

Purchased three cases of Mag 1. Results after just 2 bottles are impressive. Added to 87 octane gas when I fill up, my SUV runs as if powered by 92+ octane. My highway mileage at 70mph a fully loaded SUV is better than manufacturer's mpg rating. 93 octane gas is typically 40 cents a gallon (or more) more than regular. Using Mag 1, I save around $4.00 per fill-up vs. the 93 octane.

Great product and shipping! And much less expensive on-line that what's charged at the gas stations. It does work to stop pigging for cars requiring a higher level of octane at the pumps.

I bought it for use in my car. Worked well however with more research I had found Mitsubishi considers MMT which is found in this product to be a low grade booster and they suggest you do not use MMT in their vehicles. Their words. To use up the case I am using it in my lawn mower and tractors. In a 23 HP B&S engine it works well and tamed the harsh engine and takes very little as the tank is only 2 gallons. Only took about 15 minutes to see the results on a well maintained mower. I think I will go with Gunk as it has no MMT for the Mitsu.

good enough to save some coin at the pump for my Audi. Some stores must subsidize lower priced Regular by jacking up the prices of Ultra/Premium...when it's over 20 cents higher, I dump one of these in (got them for under $2.50 in bulk) and no difference/car runs great as usual

Label says for off-road only - does not make sense as the back says for all types of fuel. I have used in three tanks of gas so far and seem to work just fine. After Harvey the premium gas prices here in TX have gone through the roof. This eases that pain and woks fine.

I have been in the habit using either Gumout or Gunk octane booster in my 2004 supercharged GTO, and both of them eliminated the knock I used to get with 91 octane fuel under certain conditions, as long as I doubled up on the concentration. Mag 1 doesn't seem to work quite as well as the bigger name brands, but there is a substantial cost savings.

seems to help , cheaper than buying premium

seams to works good needed for my 1998 Buick regal requires premium gas for the supper charger works better with the product