Fuel tank size?

[schuh007]

I have a 2006 6 HB and when I fill up my car I usually use about 12 gallons, but all the specs I can find say I have room for 18 gallons, which is correct?

 

[tunersteve]

I have a 2006 6 HB and when I fill up my car I usually use about 12 gallons, but all the specs I can find say I have room for 18 gallons, which is correct?

Whatever your owners manual says. I believe its 18 gal, but I'm not 100% certain. MS6 is a 15.9, not sure what the reg. 6 is.