To many miles for synthetic? - Ford Powerstroke Diesel Forum
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post #1 of 14 Old 07-07-2008, 08:05 PM Thread Starter
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To many miles for synthetic?

I have a 2000 F250SD it has 208,000 miles on it. It runs great, I have been putting Rotella T in it sence I got the truck back in Sept of last year. I was wondering if I should just keep useing what I have been or start running synthetic in it. I have been told not to put it in a engine with that many miles or I'm going to have oil leaks really bad if I do. And should I change out the tranns/T case and front/rear diff with synthetic too?

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post #2 of 14 Old 07-07-2008, 09:17 PM
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i would change everything except the motor to synthetic. if rotella t is working for you stay with it, unless you like spending alot of money

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post #3 of 14 Old 07-07-2008, 09:24 PM
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Why change a good thing...?

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post #4 of 14 Old 07-08-2008, 07:03 PM
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i changed out trucks over to Schaeffer synthetic oil about 6 months ago. They use less oil and run much smoother now. I would not hesitate to swap over to syn oil. with oil analysis you can see exactly when to change the oil. check out Schaeffer Oil 3.0 | Industrial Lubricants | Diesel Fuel Additive | Synthetic Motor Oils
post #5 of 14 Old 07-08-2008, 07:06 PM
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Quote:
Originally Posted by nic0084 View Post
Why change a good thing...?



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post #6 of 14 Old 07-08-2008, 07:07 PM
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They make a flush before you add synthetic fluid. Personally I'd stick with Rotella.
Haven't heard anything bad about it yet

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post #7 of 14 Old 07-08-2008, 07:50 PM
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Quote:
Originally Posted by 99bigred View Post
i would change everything except the motor to synthetic. if rotella t is working for you stay with it, unless you like spending alot of money
Huh? Amsoil and a good filter once a year is MUCH cheaper than Rotella-T or any other oil for that matter and a filter every 5,000 miles or so. You will save a lot of money in a year's time if you switch to Amsoil. I will be changing out all the fluids in my truck to Amsoil products over the next month. I'll let you know about any increase in fuel economy. Doesn't always happen, but often does.

Engine Flush is not necessary in diesels. Good idea for gas engines converting from dino to synthetic.

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post #8 of 14 Old 07-08-2008, 08:23 PM
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I wouldn't change the engine to synthetic this late in the game. I've read something about oil leaks occurring from the use of synthetic in high mileage vehicles. However the use of semi -synthetic was said to be o.k., but like others said why change a good thing. +1 for Rotella.

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post #9 of 14 Old 07-09-2008, 02:04 AM
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Quote:
Originally Posted by scagmanf350 View Post
I wouldn't change the engine to synthetic this late in the game. I've read something about oil leaks occurring from the use of synthetic in high mileage vehicles. However the use of semi -synthetic was said to be o.k., but like others said why change a good thing. +1 for Rotella.
Study, study, study
Here's what I have learned. Switching to synthetic can cause leaks you ALREADY have show up. Dino forms sludge and this can seal leaks formed by dried out gaskets and seals. Synthetic dissolves/flushes out these deposits and may allow them to "appear". Synthetics have an effect of conditioning these gaskets and seals and will, overtime, allow the seals to do their job again. The cleaning and the conditioning do not happen at the same time and thus could result in a leak for a while. The sludge that kept these leaks sealed also seals oil flow passages in your vehicle.
My $0.02.

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post #10 of 14 Old 07-09-2008, 03:57 AM
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I would recommend waiting until fall/winter to make the switch to Rotella synthetic. Thats when the use of synthetic shows the most advantage.
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