can i do better?
Postmaster
Joined: Jul 2005
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Originally Posted by northey87
would a cracked exhaust manifold be a reason for bad mpg's? yesterday when i was in the engine i noticed small craks in one of the exhaust manifolds.
Cargo Master
Joined: Sep 2004
Posts: 2,691
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I get it at Wal-mart in quart cans for about $4. It's over with the paint and strippers. I also bought a small plastic bucket with 4 oz gradutions on it. The article I mentioned said that 3.5 oz/gal was optimal so I try to put 5 oz in it at every fill up since I always put about 15 gal in. It seems to do something. Some here think it is just cleaning things and doesn't really enhance the burnability of gas. But I don't know how that would be. What would be getting cleaned by acetone that increases the gas mileage, carb, intake, valves...? I don't see how cleaning those things would increase gas mileage.
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Mountain Pass
Joined: Mar 2006
Posts: 101
Likes: 1
From: Dayton
ok, i finally got around to getting a compression test done on it. all eight cylinder averaged about 145psi, the highest was 150psi and the lowest was 140psi. is 145psi high? low? good? bad? or what?
Cargo Master
Joined: Sep 2004
Posts: 2,691
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That's great. All my cylinders are between 108 and 120 and most are 1111-114. Someone here told me those were good numbers. I think a good compression range is pretty big with the important thing being that they're all close.
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