I use it in both the Jeep and the 06 Corolla..........
Never really noticed any difference in the Jeep, but it did quiet down the Corolla’s somewhat noisy 1ZZFE VVT-i engine.
After the initial dosage of a full can, I run half a can in each motor at each oil change.
2006 Jeep Commander 3.7 V6 -107k (PUP/XG3600)
2006 Toyota Corolla 1.8 VVTi -75k (PPHM/XG3600)
1999 Toyota Corolla 1.8 -72k (PUP/XG4386)