soyultra works great in my 2008 4x4 5.4 ford f150. at least 1 mpg better. nutra works great in my lawnmowers and generators with starting probs. no it solved those problems. nutra kept my 2009 scion alive,when it sat for 2 yrs with same gas only able to get to it every 2 months and let it run for 20 min, before I had to head back home.