Queen of Typos & Edit
Join Date: Sep 2007
Location: Eula, TX
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1.) Does a 2002 7.3 require the exhaust additive I see at Wal Mart?
No, however I do use a fuel additive since the 7.3 was developed prior to ultra low sulfur diesel. The sulfur acts as a lubricator for seals and such. I use Amsoil's Cetane boost and Diesel Additive Concentrate. No urea injection until the 6.7s came out if I am remembering correctly
2.) Does a 2002 7.3 need an upper cylinder lubricant ie. Lucas .-. atf? I've never used one, and caution any oil additives without doing your homework. If it causes the oil to foam it can lead to injector failure
3.) Does anyone use a Gulf Coast paper towel type bypass filter .-. the 1 .-. 2 ? I don't and don't know anyone personally who does.
4.) If true to previous dumb question where did you mount it, access the pressure and dump the supply?N/A
5.) How does changing and flushing the coolant help the mpg? I've never heard of this. Now, I could see if the engine ran at a cooler temperature it could raise MPGs, however, no coolant is going to lower the temperature that much. Each engine has its "optimum" operating temperature, and I know for a fact they aren't all exactly the same in the 7.3s.
The 7.3 is a GREAT engine and doesn't need a lot of upkeep. Mine has 130K on it an it runs just as strong as it did when it was new. I know of many 7.3s that have had no mods, and no special care that have lasted an easy 400K.
2008 6.4L 4X4 Lariat
6.4L w/SCT Livewire, Deleted, and loved! About to hit 200,000 miles!
RIP 2003 7.3L Limited Excursion 4X4 & 2007 6.0L Lariat FX4