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*ZmOz* · 06-24-2005, 02:41 AM

I'm planning on putting a 5.3L into my '79. The Suburbans can get amazingly good mileage with them...I expect the same in my truck. Even a lifted truck with a 5.3L and reasonable gearing should get at least 15 on the highway. There's aluminum 5.3s too...

06-24-2005, 02:41 AM	#5
ZmOz Account Suspended Join Date: Apr 2005 Location: OR Posts: 235	I'm planning on putting a 5.3L into my '79. The Suburbans can get amazingly good mileage with them...I expect the same in my truck. Even a lifted truck with a 5.3L and reasonable gearing should get at least 15 on the highway. There's aluminum 5.3s too...