The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 88-90 454 gas mileage

BayouSS · 02-16-2010, 05:59 PM

Of the 2 454SS trucks I have owned, the one with T400 would get 10-12 mpg and the other with a 700R4 replacement trans would get 16 on interstate. Overdrive definitely helps, both had 3.73 gears.
The one I have now with the 572, well.... who knows what it will get, but who cares, all I want to do is finish it so I can enjoy it.

Bill

02-16-2010, 05:59 PM	#15
BayouSS Registered User Join Date: Aug 2006 Location: Louisiana Posts: 12	Re: 88-90 454 gas mileage Of the 2 454SS trucks I have owned, the one with T400 would get 10-12 mpg and the other with a 700R4 replacement trans would get 16 on interstate. Overdrive definitely helps, both had 3.73 gears. The one I have now with the 572, well.... who knows what it will get, but who cares, all I want to do is finish it so I can enjoy it. Bill __________________ 1990 454SS Under Construction 1996 Corvette Collectors Edition LT4 Slightly Modified Last edited by BayouSS; 02-16-2010 at 05:59 PM.