I have the Extended Range Fuel Tank on my 2021 C2S.
It has been to the dealer twice to repair the noise. Presently it is quiet.
I chose the option for several reasons: 1.) Why not. 2.) It allows me a bit of additional freedom to choose when and where to buy gasoline and 3.) With the volatility of gasoline prices, Dollar Cost Averaging can be your friend (I'm a cheap SOB).
Finally, I would not get this option again. The fixes that Porsche is using basically boil down to replacing the original foam mounting pads with thicker pads (see the attached). I'm of the opinion that the elasticity of the thicker pads doesn't really "fix" the problem, although it probably will extend the intervals between their replacements.
I've attached 1.) A copy of the Porsche Bulletin that addresses this issue, for those that may need it. 2.) Pictures of the second set of pads (used) and the latest third set of mounting pads (new) that have been used to correct this problem on my C2S. 3.) An audio file of the noise, which Porsche calls a "Popping" noise. Porsche wants an audio file from a dealer to verify that the complaint it real. The problem is that the popping noise can be intermittent and is dependent on how much gasoline is in the tank. The result being IMHO an unnecessary delay for everyone involved and places hoops in the way for the dealer to jump through to get this fixed. Feel free to share this audio file with your dealer if/when you encounter this sort of nonsense.
It's pocket change.
Whatever extra weight will be marginal. 1lb heavier maybe?
The rattle issue is much smaller than then internet makes it out to be.
It especially comes in handy if:
- you take it on spirited drives frequently
- you plan on doing track days
- you plan on taking road trips
But much like the roof transport system, it's a no brainer even if you don't see yourself using it today because things change and you don't know what you'll be into a year or two from now. Also, I would never buy a used 911 without the extended range tank or the roof transport system but I would buy one that had both even if I didn't have a need for them.
I would get it, for sure. I daily drive my 992. I first had a 2020 C2 and found that I was constantly filling up. Although the regular tank is listed at 17 gallons (is that right?), I could never get more than 16 or so in it and that meant a lot of trips to the gas station. I then specced and got a 2022 C2SMT cabriolet and got the extended tank. I've had zero issues with it at all and it's been an enormous benefit, particularly on long road trips, where I can sometimes fill up and the gauge will say I have a 650+ mile range (because of highway gas usage efficiency). I've driven to Miami from DC and only had to fill up once, and that was nice.
2023 GTS with extended tank.
No rattles. Super happy with it. I love the range.
It’s been on 7 road trips since pickup in July last year. Number 8 is next month.
Had extended. Now have standard. Miss extended. If for only to have to deal with mutants less frequently at gas stations, the extended is totally worth it.
Extra cost, more weight, increased risk of rattle. Unless you plan to drive far distances (often), I would not get this option.
Agreed!
Quote:
Originally Posted by aggie57
My experience over 4 years is that you don't need the larger tank for road trips because your mileage improves considerably at highway speeds, 400+ miles per fill. It's more relevant around town or maybe at the track because then mileage is way less and it reduces how often you need to fill up.
Having said that I would order the larger tank even with the rattles if I was buying again now (it wasn't available in 2019 when I ordered my car). If it rattles, warranty covers you.
Quote:
Originally Posted by adrianp89
'22 with no rattles. I always order the biggest tank. I hate going to the gas station and plus if a natural disaster occurs, I can make it 700 miles before needing gas.
You can go pretty far on a standard 16.9 gallon tank! I drove from Rancho Cucamonga, CA to Sedona, AZ on one tank of gas (about 500 miles more or less).
2022 GTS 7MT daily driver with extended tank here.
18 months, 12,000 miles. No rattles.
Living in Honolulu on Oahu, it's about 100 miles to go around the island, so do I really need the bigger tank ... not really but it's great that I can avoid the gas station at least once a month to fill up.
I will order the extended tank on my next 911 again.
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