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From non synthetic to synthetic oil.

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Old 01-15-2008, 08:50 PM
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Default From non synthetic to synthetic oil.

About to buy a 2000 GSR. Is it bad to start putting synthetic oil in a motor thats been running regular for 125k miles?
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Old 01-15-2008, 08:52 PM
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Default Re: From non synthetic to synthetic oil.

I wouldn't advise it. I usually tell people, if you want synthetic oil then you need to start when the motor is fresh. No sense in putting a thin oil in a motor that may have leaks that haven't shown themselves due to thicker oil.
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Old 01-15-2008, 08:53 PM
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Default Re: From non synthetic to synthetic oil.

pretty much what i was thinking. Im not going to be running the car hard anyway.
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Old 01-15-2008, 08:54 PM
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Default Re: From non synthetic to synthetic oil.

Originally Posted by MattnTheHATch
pretty much what i was thinking. Im not going to be running the car hard anyway.
Just running it in general would cause the leaks to show. I'd stick with the regular oil.
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Old 01-15-2008, 09:00 PM
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Default Re: From non synthetic to synthetic oil.

Wouldn't you want the leaks to show so that you can fix them?
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Old 01-15-2008, 09:02 PM
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Default Re: From non synthetic to synthetic oil.

Originally Posted by I <3 Cobra4b
Wouldn't you want the leaks to show so that you can fix them?
Well, yes and no. Some people just want the car to last that much longer untill they can get into something better. And others could use it to find what needs to be fixed. Or just go the safe way and replace all the seals.
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Old 01-15-2008, 09:03 PM
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Default Re: From non synthetic to synthetic oil.

Who said synthetic was thinner?
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Old 01-15-2008, 09:04 PM
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Default Re: From non synthetic to synthetic oil.

Originally Posted by dave22
Who said synthetic was thinner?
I've always known it to be. At least thats what I was told a few years ago.
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Old 01-15-2008, 09:10 PM
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Default Re: From non synthetic to synthetic oil.

I mean if you get a lighter weight, sure.

Synthetics, due to their stability, won't gunk up the seals so if there are leaks the synthetics will expose them over time as the gunk is cleared out. You won't have better or worse seals with synthetic or convenbtional oil. So if the logic is to maintain gunk in order to hang on to bad seals then stick with conventional.
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Old 01-15-2008, 09:12 PM
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Default Re: From non synthetic to synthetic oil.

Originally Posted by dave22
I mean if you get a lighter weight, sure.

Synthetics, due to their stability, won't gunk up the seals so if there are leaks the synthetics will expose them over time as the gunk is cleared out. You won't have better or worse seals with synthetic or convenbtional oil. So if the logic is to maintain gunk in order to hang on to bad seals then stick with conventional.
Exactly what I said with more/bigger words.
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