Redbob
Well-known member
A couple months ago, I started a thread about fuel tank capacity.
My '89 won't take more than about 18.5 gallons even if I run it 'til it stalls; and yes, running it 'til it stalled was done on purpose - to find out the fuel capacity!
Various other owners noted that their cars had a bonafide 20 gal. capacity, while still others had cars like mine, but nobody could tell me why.
I think I've found out, from a ZR-1 website:
"PROBLEM - When you go and fill up your fuel tank even though the gas gage reads empty, your tank takes less than 20 gallons.
CORRECTION - There is what is called a "bladder" inside the fuel tank. This bladder is not pliable but a rigid black plastic. What can and does happen is this plastic liner pulls away from the fuel tank walls causing bulges or bubbles. These bulges can shrink the size of the liner and therefore reduce the capacity of the fuel tank. The only correction is to replace the fuel tank. Thanks to the ZR-1 Registry, Dennis Gratton and Jim Ingle for this information.
SERVICE BULLETIN/RECALL - No
My '89 won't take more than about 18.5 gallons even if I run it 'til it stalls; and yes, running it 'til it stalled was done on purpose - to find out the fuel capacity!
Various other owners noted that their cars had a bonafide 20 gal. capacity, while still others had cars like mine, but nobody could tell me why.
I think I've found out, from a ZR-1 website:
"PROBLEM - When you go and fill up your fuel tank even though the gas gage reads empty, your tank takes less than 20 gallons.
CORRECTION - There is what is called a "bladder" inside the fuel tank. This bladder is not pliable but a rigid black plastic. What can and does happen is this plastic liner pulls away from the fuel tank walls causing bulges or bubbles. These bulges can shrink the size of the liner and therefore reduce the capacity of the fuel tank. The only correction is to replace the fuel tank. Thanks to the ZR-1 Registry, Dennis Gratton and Jim Ingle for this information.
SERVICE BULLETIN/RECALL - No