Jump to content
Sign in to follow this  
Mid Mod Guy

Fuel tank capacity and fill-up

Recommended Posts

I took my 63 Avanti to the gas station today. The fuel gauge showed one mark above empty. I put the gas nozzle all the way into the filler neck and filled it until it clicked off. I assumed it was full. But it only took 6.7 gallons. I was afraid to fill it more due to the risk of spilling fuel on the body.  Is it true that our cars have 21 gallon tanks? If so, do others find that gas pumps click off too early? Should I keep filing it further? Perhaps something about the design of the filler neck signals the pump to shut off too soon, or maybe my fuel gauge is inaccurate. I'm looking for experience here.

Note: I had a Triumph Spitfire that had the fuel tank filler just in front of the trunk lid, right behind the seats, in the center of the car. I once overfilled it and gas poured and sprayed everywhere, and with the top down, it was not pretty. So I'm hesitant to overfill.

 

Share this post


Link to post
Share on other sites

The gas tanks are rated at 21 gallons but many have reported they can't get that much into them.  It's best to not fill them all the way...especially in the heat.  The gasoline will expand and go right up and out onto the quarter panel quickly if the car is parked on any kind of slope.

To save the panel from damage from the pump handle you can cut a piece of thin rubber and mount it on the filler neck.  On the '70 I had I tried one cut for a '78 Corvette and it worked beautifully.  

Share this post


Link to post
Share on other sites

Thanks @Gunslinger.  My car came to me with a slight discoloration from gas spilled below the filler, so I will definitely be cautious.

Share this post


Link to post
Share on other sites

Here's what I did for the '70 Avanti I recently sold...this is a pre-cut piece of rubber made for a '78 Corvette that Corvette specialty companies sell.  It works just fine and folds up neatly behind the gas cap door.

Avanti-gas-cap-cover.jpg

Edited by Gunslinger

Share this post


Link to post
Share on other sites
2 hours ago, Gunslinger said:

Here's what I did for the '70 Avanti I recently sold...this is a pre-cut piece of rubber made for a '78 Corvette that Corvette specialty companies sell.  It works just fine and folds up neatly behind the gas cap door.

 

An excellent idea. My 83 came with a similar piece installed by the factory. This is a great solution for the earlier models. 

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
Sign in to follow this  

×
×
  • Create New...