My take is if your truck tires don't have nitrogen, don't waste your time filling the RV tires with it. When you stop for air, you have to check ALL of the tires. Not too many places that sell tires have a parking lot big enough to allow for a large RV. I have a small 120volt air compressor also. Comes in handy for blowing out water lines in winter too. I'm sure nitrogen helps out, but is it enough of a benefit in real world experiance for you? For commercial fleets yes. For one individual, I doubt it.