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JimMorrissey
Veteran Member
What about the 5.8L gas engines of the mid/late 90s? I see a lot of them on the 3/4 tons.
One problem the 7.3's had is with cavitation of radiator fluid around the cylinders. I am not sure if that was ever fixed but to verify you might wanna make a pit stop over at dieselstop.org and check under there 7.3 section
The 6.0..... well nothing gets better fuel mileage than a 6.0...... stays in the shop or hooked to a tow truck