Gas Tank Capacity November 23, 2025, 03:45:37 pm So I'm getting ready for my first real camp trip... the tank is just a needle width below half so I decide to top it off.. it took 56 gallons and stopped before full since the limit was $250.00 (ya,. California) Is it possible this rig has a 100 gallon gas tank?
Re: Gas Tank Capacity Reply #1 – November 23, 2025, 04:06:34 pm Or a sticking float on the sender unit in the tank?
Re: Gas Tank Capacity Reply #2 – November 23, 2025, 04:28:35 pm Quote from: Keith S - November 23, 2025, 04:06:34 pmOr a sticking float on the sender unit in the tank?no, it's working normally
Re: Gas Tank Capacity Reply #3 – November 23, 2025, 04:31:01 pm Hi Bill,We have a 2015 Rear Bath. Its fuel capacity is 50 gallons. Sounds like your tank was empty. If this is true then it may be that your tank float is faulty. Perhaps it will free up after the gas rocks around in the tank. We get about 9 miles a gallon and usually fill up at 1/2 full. Keep an eye out on your mileage. Kent
Re: Gas Tank Capacity Reply #4 – November 23, 2025, 04:31:41 pm 55 gallons is more likely. You have something else going on. Rich
Re: Gas Tank Capacity Reply #5 – November 23, 2025, 06:59:30 pm Quote from: Kent Heckethorn - November 23, 2025, 04:31:01 pmHi Bill,We have a 2015 Rear Bath. Its fuel capacity is 50 gallons. Sounds like your tank was empty. If this is true then it may be that your tank float is faulty. Perhaps it will free up after the gas rocks around in the tank. We get about 9 miles a gallon and usually fill up at 1/2 full. Keep an eye out on your mileage. Kentnot faulty works fine below 1/2.. generator quit running when it got to 1/4 I've been getting 7 mpg but that's been 11 mile trips on the highway and only filling to 1/2 until now....
Re: Gas Tank Capacity Reply #6 – November 23, 2025, 07:02:20 pm Quote from: rich - November 23, 2025, 04:31:41 pm55 gallons is more likely. You have something else going on. Richwhy do you say that?,. do you have the same model? i have no evidence that the gauge is faultyI had an 87 30' Bounder - it had a 100 gallon tank.. it's not beyond possibilitySomeone here has more knowledge about my particular model (which I now know is rare), hopefully he'll chime in
Re: Gas Tank Capacity Reply #7 – November 23, 2025, 07:21:54 pm Yeah, it’s possible your 30GP had a larger tank. Let us know what you find out. 1 Likes
Re: Gas Tank Capacity Reply #8 – November 23, 2025, 08:11:28 pm My 1995 LD manual says the approximate weight of fuel for my 26 1/2' IB is 330 lbs. The 30' IB Chevrolet 30GP chassis approximate gasoline weight is listed as 360 lbs. At 6 lbs/gal, that translates to 55 gallons and 60 gallons respectively. Still way short of 100 gallons, but gauges often aren't that "linear", by that I mean when gauge reads 1/2 often a lot more or a lot less gas is actually in the tank. For example, my 1997 Ford Thunderbird goes almost 300 miles on the first 1/2 tank and only 100 miles on the second half. Fueling at the pump verifies this discrepancy. Filling from 1/2 to full takes about 15 gallons. Filling from empty (warning light on) to full takes about 20 gallons. I've also noticed LD literature was not always accurate on capacities of their water and sewer tanks so they could be off on the fuel too.
Re: Gas Tank Capacity Reply #9 – November 23, 2025, 08:28:07 pm Quote from: DesertDust (Bill) - November 23, 2025, 03:45:37 pmSo I'm getting ready for my first real camp trip... the tank is just a needle width below half so I decide to top it off.. it took 56 gallons and stopped before full since the limit was $250.00 (ya,. California) Is it possible this rig has a 100 gallon gas tank?It's 'possible. The GP30 is such a rare model that little information is available, none of my old LD specification pages list the GP30. The GP30 has a higher GVW than the E450s, with their 55 gallon tanks, and could easily carry the extra weight. AKAIK, LD built just a handful of GP30s. A GP30 is built with Chevy or GM P30 motorhome underpinnings and a van cab that is raised up to match the taller tires. This chassis is more often seen with a Class A MH or a step-van configurationLarry
Re: Gas Tank Capacity Reply #10 – November 23, 2025, 08:32:28 pm I did some parts searching and found a reference for fuel senders that showed two options... one for a 60 gallon tank and the other for an 80 gallon tank.As you drive it more, I'm sure you'll have a better idea of what you have. 👍 1 Likes
Re: Gas Tank Capacity Reply #11 – November 24, 2025, 04:02:25 am Hi Bill (DesertDust); my carbureted Dodge 360 in a '79 chassis had an 80 gallon tank. Well over $120 for a full tank in California back in the late '80's. (about $2.50 /gallon back then. RonB
Re: Gas Tank Capacity Reply #12 – November 24, 2025, 11:20:00 am Quote from: DesertDust (Bill) - November 23, 2025, 07:02:20 pmwhy do you say that?,. do you have the same model? i have no evidence that the gauge is faultyJust an educated guess. If you do have 100 gallons, it would be an odd choice b/c of the extra weight. Also, RVs have long term fuel storage issues (even more so in the 90's) and 100 gallons doesn't make that issue easier to manage.Chevy lists 33 and 55 gallons as chassis options. You should be able to look at the fuel tanks and get an idea of what you have. For reference, the Ford 55 gallon tank many of us have has these dimensions: https://www.fordpartsgiant.com/parts/ford-tank-asy-fuel_9c2z-9002-e.htmlRich
Re: Gas Tank Capacity Reply #13 – November 24, 2025, 12:37:24 pm Hi Bill (DesertDust); IRV2 had some comments about the long chassis Chevy motorhome gas tank sizes. With the Island bed or twin bed from Lazy daze you would fall into that category. Quote "Now I am just confused so I went out and measured all the tanks.Water: 21 x 46.5 x 15.5 = 65.5 gals, Gray water: 39 x 25 x 9.5 = 49.0 gals, Black water: 32 x 13 x 19 = 34.2 galsFuel: 62 x 27 x 13 = 94.2 galsI guess none of these tanks can be filled to their full capacity so the fuel tank should be around the 85 - 90 gals range? 1985 Pace Arrow L34" (Reserve air space at the top of the tank to allow for expansion of gasoline.) It was common at that time for 'gas guzzlers' at 7 mpg to have large tanks. I sat in line at a gas station once (in my 80 gal Dodge Lindy motorhome) for a Chevy Suburban to fill up. Took forever! The pump stopped at 110 gallons. Talking with the owner, he had an auxiliary tank installed to extend his range. (about 1990) Desert campers with generators and extra vehicles to gas up from the "mothership" might have had extra tanks. A friend with a 2002 Toy Hauler has a 55 gal tank just for the trailer (gasoline). He has a Ford Dualie 7.3 liter diesel crew cab to pull the toy hauler. At one time dual 4 wheel ATC's. Old tanks, have old level senders, and as the wire 'spiral' wears out near the top of the tank, the resistance becomes less linear. So in my older vehicles I trust the amount shown on the gauge as actually being in the fuel tank less. My T/K only has a 37 gallon tank, and a reputed only useable 35 gallons. So I don't have the luxury of only "driving on the top half" of the tank. 9.8-10.1 mpg is reliable, (I almost never run the generator), so 320 miles is my limit. I plan suitable gas station stops at about 275 miles. RonB
Re: Gas Tank Capacity Reply #14 – November 24, 2025, 01:21:37 pm Quote from: RonB - November 24, 2025, 12:37:24 pmHi Bill (DesertDust); IRV2 had some comments about the long chassis Chevy motorhome gas tank sizes. With the Island bed or twin bed from Lazy daze you would fall into that category. Quote "Now I am just confused so I went out and measured all the tanks.Water: 21 x 46.5 x 15.5 = 65.5 gals, Gray water: 39 x 25 x 9.5 = 49.0 gals, Black water: 32 x 13 x 19 = 34.2 galsFuel: 62 x 27 x 13 = 94.2 galsI guess none of these tanks can be filled to their full capacity so the fuel tank should be around the 85 - 90 gals range? 1985 Pace Arrow L34" (Reserve air space at the top of the tank to allow for expansion of gasoline.) It was common at that time for 'gas guzzlers' at 7 mpg to have large tanks.Thanks Ron, that pretty much checks out with my experience so far. I couldnt get a good measurement of the height of my tank but length and width are real close to the 67 x 27
Re: Gas Tank Capacity Reply #15 – November 24, 2025, 01:31:11 pm Quote from: Larry W - November 23, 2025, 08:28:07 pmIt's 'possible. The GP30 is such a rare model that little information is available, none of my old LD specification pages list the GP30. The GP30 has a higher GVW than the E450s, with their 55 gallon tanks, and could easily carry the extra weight. AKAIK, LD built just a handful of GP30s. A GP30 is built with Chevy or GM P30 motorhome underpinnings and a van cab that is raised up to match the taller tires. This chassis is more often seen with a Class A MH or a step-van configurationLarryThanks Larry, It wasnt until after I bought it that i realized the interior seemed almost as big as the Bounder I had in the 80s. the size was really driven home when I put 7 tires on it,... even finding a place that could do the tires was a chore.
Re: Gas Tank Capacity Reply #16 – November 24, 2025, 04:15:01 pm I ran my 2013 31 IB from Costco in Carson City to Costco in N. Las Vegas. I was concerned the last few miles. It took 52 gallons. Then next time I do that it will be a mistake. I rarely get it below a half tank. LD says it's a 55 gal tank
Re: Gas Tank Capacity Reply #17 – November 24, 2025, 05:12:43 pm Quote from: DesertDust (Bill) - November 24, 2025, 01:31:11 pmThanks Larry, It wasnt until after I bought it that i realized the interior seemed almost as big as the Bounder I had in the 80s. the size was really driven home when I put 7 tires on it,... even finding a place that could do the tires was a chore.I guess your LD is new to you, very few if any members have any idea what you own. In 30 years of LD ownership and working on LDs, I have only seen two or three GP30s, they are among the rarest of LDs, similar to the 30' E550s. The rarest of LD is the Class A prototype, a model that never made it to market, now owned by the Nordstroms, the couple who run the LD Caravan Club. They own many unusual LDsLarry
Re: Gas Tank Capacity Reply #18 – November 24, 2025, 08:35:35 pm Hello all,On our 2009 Kodiak the gas tank is 80 gallons fresh water 60 gallons and propane is 25 gallons. Jody 4 Likes
Re: Gas Tank Capacity Reply #19 – November 28, 2025, 09:19:28 am Interested to find out what your tank size is. Gauges can act odd when they age. I have an 1989 Ford F150. When I fill it the gauge reads a little above full. We can drive a long time and the gauge doesn't change. Once it starts to drop below full, it bounces from full to low. When that happens we have about a 1/4 tank of gas left and know we should fill it.
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