2015 Seneca Fuel Capacity

[jdshep1]

Originally Posted by ready2retire&drive

I have run 2 trips with these no problems and it adds about 40 litres to a fill up

Where did you get the extensions?
johnd

[ready2retire&drive]

I had them made am looking at distributing them once we have the process in place

[AaronM]

I would be a little concerned about filling the tank completely full. If you were on the road and knew that you were going to be burning fuel quickly it should be OK but, if for some reason you had to stop and the fuel was able to heat up, it might get messy. It might also be illegal but not sure how you would ever get caught.

US DOT Regulation 393.67 Subpart E.

12) Overfill restriction. A liquid fuel tank manufactured on or after January 1, 1973, must be designed and constructed so that—

(i) The tank cannot be filled, in a normal filling operation, with a quantity of fuel that exceeds 95 percent of the tank's liquid capacity; and
(ii) When the tank is filled, normal expansion of the fuel will not cause fuel spillage.

THERMAL EXPANSION Like all liquids, diesel fuel expands slightly in volume as its temperature increases. The coefficient of thermal expansion measures the rate of the expansion. A typical value of the coefficient of thermal expansion for diesel fuel is 0.00083 per degree Celsius (0.00046 per degree Fahrenheit). Using this value, 1.000 gallon of diesel fuel at - 7 °C (2 0°F) will expand to 1.037 gallons at 3 8°C (100°F). 50 gallons could expand to almost 52 gallons.

[ready2retire&drive]

I found that when I filled my my tanks up without the extensions and parked on my pad at home (which has an angle to it) the low side tank leaked ( quite messy and smells) the stock cap vents and will leak when fuel gets warm and expands. Since I have put the extensions on no problems but I will test different fill levels and angles of parking and temeratures to get a good assesment of these. I realize for the fill and go guy's this will give them more range but will do more testing so the fill and park guy's can have confidence in these

[Cdrip]

Put us down for a set when you have them ready for sell.

[Les7h]

When you have the fuel filler extensions available - I would like a set
Les

[Cdrip]

Are the extensions available for sale yet?

[ready2retire&drive]

We have patent pending on it now, am working on the packaging and finalizing insurance on the product hope to have it availble by the end of Feb on E bay and Jayco dealers also my freightliner parts department might carry it too so if they get on board might be able to get it into other parts department too.

[arb]

I have the same gauge and fuel capacity issues as everyone else. I own a 2015 ts,but I would think all chassis would be the same as far as tankage. With low fuel light on,needle on E,hard pressed to get more than 48 gal on fill up. So I drove home on empty,disconnected the fuel supply line at the fuel/ water seperator.Hooked up a small fuel pump and pumped all the fuel out. They drain to maybe an inch left. Filled up both tanks to an inch of the top of the fuel fills. 64 gal on your best day is it. Hope this helps.

[Mark S]

All this discussion about the inaccurate fuel gauges makes me feel really good about my ScanGauge purchase. Yes, a larger tank would be really nice as would an accurate fuel gauge.

Although this and a whole bunch of other "little things" bother me, I am not going to let it ruin the awesome feeling of seeing a beautiful new Seneca in my yard 😄.
At least not yet.

[johnd]

I owned a 2015 TS and there was noway to get more than 46-48 gallons.
I have since sold the Seneca and tried a 2016 Winnebago Aspect 31J (very nice but no diesel and no trans brake) and in July 2018 I bought a new 2018 Renegade Valencia 38RW which is their (Renegade's) new competition for the Seneca. It has 100 gallons of diesel and you can get it all, 10 gallons of DEf and 150 gallons of fresh (and that is a lot) and a very big propane tank. All the items I didn't think were adequate on the Seneca.
I now have 6500 miles and am very very happy on my decision.

[Mr Bill]

Originally Posted by ready2retire&drive

I had them made am looking at distributing them once we have the process in place

Any updates on the filler neck extensions? Sure would like to add these to our Seneca. Thanks....

[Robbbyr]

Originally Posted by Mr Bill

Any updates on the filler neck extensions? Sure would like to add these to our Seneca. Thanks....

Have you checked Gord's website?: https://extendafill.com.

Many of us have purchased ours there. My credit card company made the necessary exchange computation, and delivery was fast!

[Les7h]

The extendafill is wonderful and the customer service from Gord is First Class Les

[SloPoke]

The extendafill is one of the best we have added to our Seneca. We only wish that we had put them on at the day we bought it. Our tank fairings are all scratched up, all done before we put the Extendafill on.

[brtnsnwbrds10]

Do check out Gordon's site extend-a-fill. they are absolutely a must on these rigs and his customer service is top notch!!

[tjbroussard]

Originally Posted by Mr Bill

Any updates on the filler neck extensions? Sure would like to add these to our Seneca. Thanks....

Have had mine for sometime now. Best addition. Not only takes on a bit more fuel, but saves me from banging up the paint on the filler area. And as others have said the customer support from Gordon is outstanding.

Terry

[Mr Bill]

FANTASTIC!!! You do great work!