Actually to be perfectly honest I haven't tried the Lubriguard yet, I have used the Ultraguard and the warm weather blend and I can't really notice much of a difference between the 2, BUT, having said that I do like using the product, I just came back from a BC road trip, did a fair bit of driving around on the Island, I drive a 2008 Silverado 2500HD Duramax and from what some other people are claiming for fuel mileage my truck just never seems to do as well, it is still good though, I have a 98 gal aux. fuel tank and with that full, 4 people and luggage I am easily over 9000 lbs, ( I weighed it with the aux. tank and box empty it was 8000 lbs), 2 years ago we took the truck to Vancouver Island and my fuel mileage (hand calculated) was 21 to 23 mpg imperial gallons with one tank in the mountains reaching almost 27, this year with the Stanadyne my worst tank was 23.25 mpg and my best was coming back from Golden BC to Medicine Hat AB I hit 29 mpg on that one tank only, I haven't done any close calculating yet but my guess is 25 average. Can't complain with that. Thanks for a good WORKING product.