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Farmall & IHC Tractors Discussion Forum
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Using synthetic oil...need opinions here

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KURT (mi)

07-30-2004 00:16:26




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I just put synthetic in my wifes 2002 Saturn car, 35K miles on it. I drained the old regular petroleum oil out it and I did not use an engine flush, Is engine flush needed B4 you put in synthetic oil?




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Doug in OR

07-30-2004 19:13:28




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 Re: Using synthetic oil...need opinions here in reply to KURT (mi), 07-30-2004 00:16:26  
I use AMSOIL and they recommend that you flush your engine before switching to synthetic if you have more than 20,000 miles on it. Personally, I'd leave it as it is, but change your oil twice as soon the first time.

As for Cubber's statement about all synthetic oils are mineral based: WRONG! Some oils are made using a modified mineral base, but I consider these to be inferrior to the real deal. Castrol Syntec is in fact, one of these oils. They had to go to court to even use the name synthetic. Know your synthetic oils - they are not all equal. As for a waste of money: I run my AMSOIL for a full year. I change my filter twice a year. I drive 17,000 miles a year and I spend under $40 per year on oil and filter changes. Let's see you do that with your regular oil, Cubber.

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Ron Sorden

07-30-2004 12:05:18




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 Re: Using synthetic oil...need opinions here in reply to KURT (mi), 07-30-2004 00:16:26  
I have used synthetic for over ten years (mobil 1) I started with Mobil 1 in my 92 Lincoln town car as it was running a little too warm. It started running cooler after the first 3-400 miles. An added bonus was I picked up 3 mpg which I hadn't expected. I have used it since then and have never flushed an engine when I changed it out. Your engine must be running in great shape with no oil burning as synthetic will not help that.

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49 Cubber!

07-30-2004 06:13:07




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 Re: Using synthetic oil...need opinions here in reply to KURT (mi), 07-30-2004 00:16:26  
Most synthetic oils are pteroleum based anyways,so why spend the extra cash?(Wish I could find that link)



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Steve W (NY)

07-30-2004 05:49:57




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 Re: Using synthetic oil...need opinions here in reply to KURT (mi), 07-30-2004 00:16:26  
I am a big fan of the semi synthetics in older stuff. My 20 year old BMW motorcycle leaked most of the seals on straight synthetic, and then stopped after I put the semi-synthestic back in. as far as I know, all the synthetics are compatible with regular oil. By the way, I've always run full detergent oil in my old stuff, and have never flushed the engines. They are clean on the inside.

Take care
Steve

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BradleyB

07-30-2004 04:17:05




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 Re: Using synthetic oil...need opinions here in reply to KURT (mi), 07-30-2004 00:16:26  
No...if you have been using a brand name oil and changing it regularly (every 3 months / 3000 miles), you shouldn't have much to any buildup in your engine considering the quality of most all motor oils today. After saying that, I would never put a engine flush in a motor anyway. You don't want to remove all of the carbon buildup that may be in motor because it is helping to "seal it" somewhat and if you remove it, you could make a motor start to burn oil.

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dhermesc

07-30-2004 05:39:01




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 Re: Using synthetic oil...need opinions here in reply to BradleyB, 07-30-2004 04:17:05  
I have no problem using engine flush - but you have to remember to add some kind of stop leak (Eagle?) when refilling. The solvents in the engine flush will dry out oil seals. I think that is where the idea that flushes cause oil leaks comes from.



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