Just my own experiment - now running MMO at 960 : 1 ratio along with TC-W3 at 1280 : 1 ratio (recommended MMO alone ratio is 320:1 while same alone for MMO is 640:1) . So for 14 gal of gas I put in roughly 2 oz. of MMO to 1 oz of TC-W3 . In the first complete tank of gas I increased 1 mile per gallon over plain 87 octane gas bought at the same location with similar driving habits . I will continue to monitor to see if the 1 mile per gallon increase continues . * Interesting to note that the recommended dosage of MMO or TC-W3 DROPS my gas milage by approx. 3 miles per gallon in my 4 cylinder DOHC Hyundai engine . It makes me wonder if the recommended dosage of MMO and TC-W3 were configured around older V- 8 or V - 6 engines ??