Thread: Tire pressure & fuel economy

2009 Triton 4WD 3.2 auto with ECU re-map, Dunedin to Alexandra nearly 11 l/100km on the trip computer read-out. Thought that was a bit thirsty for open road running as engine was purring nicely, scratched my head and read some threads in this forum, started wondering about tire pressures. Yokohama Geolandar G015 265/70/16. Checked and found all 4 about 29 psi, so blew ‘em all up to 36. Return trip Alex-Dunedin, the trip computer read 9.0 l/100km. Dunedin home is not much lower elevation than Alexandra, so not an uphill/downhill issue. Point well proved re tire pressure – although doubtless no surprise to some of you.