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Old 12-10-2013, 10:47 AM   #1
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Synthetic oil

Ok so I tried to find my answer on Google and other forums and nothing so here is my question.

My best friend bought an 89 lx and we were talking about synthetic oil when Mr. Know-it-all at o'reilys said not to change to synthetic because of the "cork caps" in older cars and you will have an oily mess and blow the motor because of how old it is...then he proceeded to say mustangs don't need synthetic it won't run any better, so my question is, does the 89 lx have cork caps or whatever and will it be ok to change to synthetic?
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Old 12-10-2013, 12:34 PM   #2
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Can someone just say yes or no please?!!!! Helppppp
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Old 12-10-2013, 12:38 PM   #3
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Can someone just say yes or no please?!!!! Helppppp
Maybe...
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Old 12-10-2013, 12:39 PM   #4
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Maybe...
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Old 12-10-2013, 12:47 PM   #5
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-_-
I've always been hesitant on older cars to switch to full synthetic... Could leak.

Maybe a high mileage blend?
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Old 12-11-2013, 02:04 AM   #6
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I honestly can't say yes or no on that :/ sorry

But I will recommend a high mileage oil, last change I put Castrol gtx high mileage in and she seemed to like it.

Good luck!

Ps I've never heard of "cork caps"
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Old 12-11-2013, 05:02 AM   #7
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Castrol gtx high mileage
+1

For sure good oil IMO as well. Have been running it in my own vehicles as well as customer rides. Always looks good when I drain it, still has lubrication left as well. I generally will toss a little Lucas Oil Stab in when im changing the oil. Just make sure you buy a decent filter "no fram".
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Old 12-11-2013, 06:06 AM   #8
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Pure internet nonsense that synthetic will cause an oil leak with older cars. Todays synthetics can even be mixed with non synthetics for safe operation.

If you want to use synthetic or semi synthetic in your engine, do it. If the engine is a high mileage "smoker", then don't waste your money, as the synthetic won't help that of course.

And find another auto parts store. That friendly know it all at your o'reilys is giving out wrong advice when it comes to synthetic oil use.
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Old 12-11-2013, 10:54 AM   #9
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+1

For sure good oil IMO as well. Have been running it in my own vehicles as well as customer rides. Always looks good when I drain it, still has lubrication left as well. I generally will toss a little Lucas Oil Stab in when im changing the oil. Just make sure you buy a decent filter "no fram".
Why no fram?
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Old 12-11-2013, 01:43 PM   #10
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Why no fram?

NEVER FRAM...
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Old 12-11-2013, 05:12 PM   #11
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Why no fram?
Junk construction. Goto the store and grab fram ph2 and a motorcraft fl820s. Cut them both open. You tell me.
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Old 12-11-2013, 05:13 PM   #12
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Junk construction. Goto the store and grab fram ph2 and a motorcraft fl820s. Cut them both open. You tell me.
+1938373, mucho cardboard in FRAM
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Old 12-11-2013, 05:23 PM   #13
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+1938373, mucho cardboard in FRAM
Its not only the cardboard. Has the lowest number of pleats VS any of the others, uneven pleats VS others, junk bypass valves, tin holding the pleats where others are glued.

Frams will typically make less oil pressure VS other brands as well due to poor quality design. Back in the 50's Fram was the bees knees, have been less than stellar for decades.
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Old 12-11-2013, 05:30 PM   #14
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Thanks for the info! I'll be using a different brand next change
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Old 12-12-2013, 01:04 AM   #15
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The first synthetic oil that came out back in the mid 1970s were ester based oils and they were bad about causing leaks. The oils that are produced now have a different formulation, just use the correct weight and you should be fine. It's not the old car it's the old oils!
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Old 12-12-2013, 09:40 PM   #16
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I honestly can't say yes or no on that :/ sorry But I will recommend a high mileage oil, last change I put Castrol gtx high mileage in and she seemed to like it. Good luck! Ps I've never heard of "cork caps"

Yeah the "cork caps" I didn't know wtf he was talking about lol

Thanks for all the help and info!!!!!
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Old 12-13-2013, 11:27 PM   #17
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actually in older cars that smoke synthetic oils do help, they are more resistive to being burned.

I have seen it used on older cars up north to pass inspections testing.

and the cork caps the guy is refering to is cork front and back lower intake to block gasket and the gasket for the valve covers.. but he is still wrong.
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Old 12-16-2013, 01:51 PM   #18
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Originally Posted by bucko View Post
Pure internet nonsense that synthetic will cause an oil leak with older cars. Todays synthetics can even be mixed with non synthetics for safe operation.

If you want to use synthetic or semi synthetic in your engine, do it. If the engine is a high mileage "smoker", then don't waste your money, as the synthetic won't help that of course.

And find another auto parts store. That friendly know it all at your o'reilys is giving out wrong advice when it comes to synthetic oil use.
all good information. back in teh day when synthetics were first introduced to the public, no one realized that synthetic oils were very aggressive at cleaning out the accumulated junk in an engine. and often times that sludge was plugging oil leaks that already existed. when the sludge was gone, the leak reappeared giving the impression that the oil caused the leaks.

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Why no fram?
Quote:
Originally Posted by 87LX306 View Post
Junk construction. Goto the store and grab fram ph2 and a motorcraft fl820s. Cut them both open. You tell me.
Quote:
Originally Posted by v8pony View Post
+1938373, mucho cardboard in FRAM
plus time infinity on trashing fram oil filters and going with a good brand like purolator, motorcraft or wix.

Quote:
Originally Posted by 87LX306 View Post
Its not only the cardboard. Has the lowest number of pleats VS any of the others, uneven pleats VS others, junk bypass valves, tin holding the pleats where others are glued.

Frams will typically make less oil pressure VS other brands as well due to poor quality design. Back in the 50's Fram was the bees knees, have been less than stellar for decades.
and not just less oil pressure, but more inconsistent oil pressure as well.
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