What is the capacity of fuel tank on a '72 Cutlass?

 

20 gal.

 

Might be a little less (17?) for aftermarket tanks like Spectra.

 

I can't speak for aftermarket, only factory, but what possible reason would there be for a company to make the tank smaller than stock? It likely wouldn't fit correctly, given how the straps go around the tank. Does Spectra claim a smaller volume?

 

I got a new tank several years ago, exact same size as factory. I wasn't sure if it was 20 or 22. I guess I'm just used to seeing my gauge go up further on my '01 Pontiac when I put $20 of gas in.( even at $2.69 gal. here in good 'ol California) I like putting that amount in my '72 Cheyenne, gives me almost 1/2 tank (although I use most of that in a week going to work and back, about 60 miles.) Think I'll start driving the Olds again Chumley

 

Far as I know, the '72 C10 cab tank has a capacity of 21 gallons, so no meaningful difference.

- Eric

 

Can't explain why it's different than stock, but rockauto shows 17 gallons for the Spectra tank on my 69.

http://www.rockauto.com/catalog/more...nid=453&jpid=1

 

Well, your problem is believing the RockAuto catalog.

If you go directly to the Spectra website, you'll see that they list the Olds A-body tank as 20 gal, same as factory.

 

Joe, you've got a point these with Rock Auto, they're the ones who have the R45S A/C Delco spark plug as listed for the Olds Cutlass 350 2 barrel, and it should be the R46S. But geez, they were close though.

 

Many of their Olds motor mount listings are incorrect also.