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Old 05-20-2011, 05:10 PM
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Coolant Swap

Hello, I have a 02 7.3cc 4x4 with 61k. My question is what coolant to put back in after i drain it. The coolant in the tank is almost clear looking and original. What's the best way to flush and how much coolant does it hold. I had the tranny serviced at the ford garage at 58k. This thing has gotta out last me, if there is anything else the needs a good going over feel free to throw that in too. I recently put a 4" turbo back magnaflow on and did the DIY intake with a donaldson filter. The tunes come from a edge evo running in middle program(80hp race i think). Truck is in excellent shape in every way. I also run rotella T standard oil and was thinking about switching to synthetic oil maybe the rotella brand. Does synthetic change anything with the HPOP and injectors? I really need to try to boost MPG's, that's the only down side to the truck. Thanks is advance for the info and like i said throw in any other info that could be useful. Thanks
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Old 05-20-2011, 09:57 PM
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Flush it out completely and put in CAT/Fleetrite/Rotella/etc.. EC1 Rated ELC coolant.. best for our motors.. btw if you dont have a coolant filter get one asap.
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Old 05-21-2011, 06:23 AM
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Here is a good site that tells all the options for 7.3 coolant, He is a master diesel tech for Ford, a great site for other information too, he also answers questions and is a really cool guy.

dieselmann's Page
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Old 05-21-2011, 04:48 PM
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Thanks for the replies
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Old 05-21-2011, 09:43 PM
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X2 on the EC1 Rated ELC coolant and the coolant filter. I have replaced two water pumps (101,000 and 135,000) on my truck because I didn't opt for the coolant filter right away...

As for running 5-40 rotella, go for it! I won't try and sell you on a huge mpg increase, but there is a slight one. The truck will run smoother, start faster and easier in the cold... well worth the extra bucks. Do 5k change intervals and it isn't so bad in cost.

Other than that, the best way to get better MPG is to adjust the nut behind the steering wheel. Keep it under 2k rpm and coast a lot, drive conservatively.

Scott
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Old 05-21-2011, 09:45 PM
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Oh yeah, and normally driving on the hottest tune you have but driving like gramps will get you the best MPG. I simply can't resist punching it when I am running a hotter tune, so this option isn't for everyone.

Scott
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Old 05-21-2011, 10:30 PM
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Quote:
Originally Posted by ScottyP5947 View Post
Oh yeah, and normally driving on the hottest tune you have but driving like gramps will get you the best MPG. I simply can't resist punching it when I am running a hotter tune, so this option isn't for everyone.

Scott
my php 120 extreme tune actually drives real nice even when you're goin on it easy.. ive learned to be balanced with my 'foot to the floor' moments..haha.
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