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Old 07-04-2014, 07:58 PM
Zoltrix Zoltrix is offline
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Fluid change intervals on 7k km/yr usage

Hey guys,

Been wondering what I can really get away with on fluid changes for my 97 4.6.

Its got 265k km on it, I have had it since 2000 and I have in the past religiously changed fluids at regular recommended intervals,

Engine oil every 5k km
Coolant 50k km or 2yrs
Transmission 50k km or 2yrs
Differential 25k km or once a year.


Well, I now have a company vehicle and a second car with the old lady, the truck is my second vehicle when the old ladies out or we go camping. Its averaging 7k km a year over the last 4 years

I have heard engine oil will breakdown over time and should be changed a minimum of once a year.

Haynes recommends coolant and transmission fluids changed out once every two years.... but its really hard justifying changing out transmission fluid with only 15k on it... Am I wasting my time to change it out every 2 years just because its "old" or can I get 4 out of it? Same for Coolant and Differential.

I'm curious if anyone has any "facts" about fluids breaking down or not over time by just sitting there, or if its all a matter of opinion.
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Old 07-04-2014, 11:56 PM
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I would change the motor oil once per year. The transmission and differential are sealed and will be good forever. How about the extended life antifreeze (yellow) and leave it in for 5 years.
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Old 07-06-2014, 03:04 PM
Zoltrix Zoltrix is offline
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I did just put the 5yr antifreeze in a few months back
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Old 07-07-2014, 12:13 AM
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on the engine oil I would change it at least once a year. if it's always getting short trips then the engine doesn't get hot enough to burn the condensation/water out of the oil.

in midyear 2002 the ford trucks including the diesels switched to gold coolant which is longer life coolant than the green. it doesn't hurt the older trucks to put gold in it.
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Old 07-07-2014, 12:13 AM
 
 
 
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