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YOUR RESEARCHGas tank material - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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Use stabil in the past
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Performed · outcome unconfirmed · Original poster
I have used stabil in the past, but the car is isn't stored for more than 2-3 months.
Gas tank material - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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Fill gas tank completely
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Suggestion · Original poster
Reason I ask is a friend of mine said I should fill the gas tank completely before storing the car for winter to reduce the chance of rust developing on the inside of the tank.
Gas tank material - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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Leading evidence: 'Use stabil in the past' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Fill gas tank completely' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Suggestion · Original poster
Reason I ask is a friend of mine said I should fill the gas tank completely before storing the car for winter to reduce the chance of rust developing on the inside of the tank.
Gas tank material - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Fill tank is
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Suggestion
The other reason to fill the tank is to keep condensate from forming and mixing with the gas.
Gas tank material - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Run tank dry as water is "heavier" than gas
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Suggestion
Also a reason not to run the tank dry as water is "heavier" than gas.
Gas tank material - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Use google i gave up
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Suggestion · Original poster
I thought this would be easy, but after a half hour of using google I gave up.
Gas tank material - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Frequently discussed actions (6)
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Fill gas tank completely
No successful repair reported for this finding.
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1
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Read evidence and context
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0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
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Suggestion · Original poster
Reason I ask is a friend of mine said I should fill the gas tank completely before storing the car for winter to reduce the chance of rust developing on the inside of the tank.
Gas tank material - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
11 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
986Forum: 1 discussions
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Generation: 20261027T044418Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I thought this would be easy, but after a half hour of using google I gave up. Is the gas tank in the boxster aluminum, plastic, or steel? Reason I ask is a friend of mine said I should fill the gas tank completely before storing the car for winter to reduce the chance of rust developing on the inside of the tank. I told him it doesn't matter because the tank is either aluminum or plastic, but I can't find info to back up my case. So can anyone confirm what the gas tank is made out of? Thanks!
Black molded plastic..................... But rather than being concerned about rust, you should be adding StaBil to the fuel to keep it from going bad and screwing up your entire fuel system....................
Cool, thanks Jeff. I have used stabil in the past, but the car is isn't stored for more than 2-3 months. Probably not long enough to warrant the use of a fuel additive like stabil.
I'd still put StaBil in it, the fuel that is available today can come apart pretty quickly and the additive is really cheap insurance...... Porsche, by-the-by, has actually recommended using it year round as the result of problems they have seen. Normally, I'm the last person to agree with them on most things, but this is one that really can do not harm.............
The other reason to fill the tank is to keep condensate from forming and mixing with the gas. Especially if your fuel has enthanol in it.
Also a reason not to run the tank dry as water is "heavier" than gas.
He probably means something along the lines of mass vs. weight, as they are not really the same thing. But most people just think of it as heavier, so its easier to say that.
Water is more dense than gasoline. When it separates from gas, it settles to the bottom of the tank. The fuel pick-up is located near the bottom of the tank. Any water that separates from the gas will be pulled into the fuel system whether the tank is empty or not.
The reason that keeping the tank full is a good idea is to keep the amount of air in the tank to a minimum. Air has a harder time keeping water in suspension than gasoline, so when the temperature of the tank drops, more water will fall out of suspension from the air than it would from the gas. Gas can and does hold water in suspension but can only hold so much at any give temperature.
Most all gas tanks today are molded high density or linear low density polyethylene.
It should be stored as full as you can get it and stabil will also help emulsify and suspend any water in the tank.
This is a source reference. Confirm exact model applicability in the original material.
