I put mine on(XTP) about a month ago .WOW what a difference. According to the trucks computer I averaged about 10.8 liters per 100km and my best was 9.8.(I averaged about 118 kmh) I drove from New westminster to Logan lake and back. I also noticed that where on certain hills my Cruise Control would kick out, it now doesn't.
My motor also has NISMO headers and exhaust. The motor is out of a 2012 pathfinder. It had about 59,000 km on it. I had to replace my motor because of faulty cats. that caused a main and rod bearing to go bye bye.
I have installed the XTP spacer in May together with new spark plugs. Since then the driving is just 'nicer', I can't find a better description for it. It really feels like there is a noticeable increase in power at lower (2-3k) RPMS. Even though that might be subjective or even a placebo effect, the gas mileage has definitely improved - close to 1 mpg gain (from mid/high-14 mpg per tank averages to mid-15 and often close to 16 mpg averages, close to 16mpg used to be very rare for me).
I've seen a few around in my area (Brandon and south). The Frontier wave was exchanged in some cases.
So, now I am curious... how many of us are in Manitoba and where?
2012 Metallic Blue Pro4X Crewcab here - south of Brandon.