I bought this to help on oil consumption in my 08 Suburban. Ran it for about 6 months and never lost more than 1/10 MPG in that time. 2 months ago the Suburban was t boned and totaled. Put the Range in our new to us 13 Tahoe and have actually come up 2/10 MPG avg. Very satisfied with this product. Works exactly as advertised. Would recommend to anyone looking for a fix to the oil consumption. It put an end to ours. Thank you