2008 Ridgeline RTS in Billet Silver Metallic
Years ago, I did a test of using non-ethanol gas. In order to be consistent, I trickle fueled my 2008 Ridgeline close to the brim. I found it would easily take over 3.5 extra gallons of gas after the auto-shutoff shut off the pump. This was before I knew that I could potentially contaminate the vapor recovery system.TOPPING OFF: I almost always top it off when filling and more to the max when driving distances or having fuel points to use. I have filled my tank to exactly 21.0 gallons with a high probability of at least 0.5 gallons still in the tank which is not good for the pump, and also to 23.861 gallons when I stupidly was not paying attention. I still had no idea how I got to almost 24 gallons and so filed a complaint with the dept of weights and measures. However, I recently learned that when you go beyond filling the neck (3/4-1ga), some of it can return into the pumps vapor recovery system giving them some free gas at our expense and, much worse, it can possibly spill over into the EVAP system via the vapor intake hole, which can then be sucked into the charcoal canister which can only deal with fumes and can ruin it to the tune of a few hundred dollars or much more, especially trying to diagnose it. I have no clue myself. I now assume that because I was filling it so very, very slowly in order to totally max it (had $0.80 off per gallon points) that it was going back into the vapor recovery system, or perhaps somewhere else(?), and wasting much of my discount and time.
I found this was all usable fuel and was able to extend my range between fuel stops accordingly. Where the fuel gage would come off the full mark at about 50 miles on a normally filled tank of gas, fueled to the brim, it would easily go 100 miles before it would break the case. Instead of 300-325 mile fuelups, I was getting close to and exceeding 400 miles.
The listed fuel capacity of the G1 Ridgeline is 22.01 gallons. I have exceeded that amount on multiple occasions by trickle fueling after auto shutoff occurred. I think the most I ever put in was something over 24 gallons. I frequently drive it well into the LF light too. The most I recorded was just over 56 miles on the LF light.
Here are some notes I made when I first started the test back in Sept 2011.
I did this for about 7 months before I learned better. Thankfully, my truck has not exhibited any problems from the over-fueling.
I don't know how much extra fuel the G2 Ridgeline would hold after the auto shutoff acts, but if it's like my 2008 Ridgeline and 2006 Pilot, there may be an extra 3.5 - 4 gallons available should push come to shove.