Convert to fully synthenic motor oil. - Page 4 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 07-06-2005, 12:04 AM   #31
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Another relevant question...I want to switch as well. Since I'm at 25K it'* definitely early enough. Oh yeah, the question:

How much more is synthetic oil (price-wise) compared to regular? Filter price difference between the Mobil 1 filter and OEM (OEM is usually $11-12)?

Also, I heard from a guy saying his mileage improved a noticeable amount when he swicthed to synthetic. Is that common??
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Old 07-06-2005, 12:05 AM   #32
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I'd say that'* unheard of. Not possible at all.
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Old 07-06-2005, 12:05 AM   #33
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Quote:
Originally Posted by willwren
I'd say that'* unheard of. Not possible at all.
Yeah, ok then I'm not insane. I didn't believe it when he told me either.
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Old 07-06-2005, 12:08 AM   #34
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You'd need a HUGE sample of identical cars over a year to get enough data to prove one way or the other. Tank to tank would be impossible.
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Old 07-06-2005, 12:13 AM   #35
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Quote:
Originally Posted by willwren
You'd need a HUGE sample of identical cars over a year to get enough data to prove one way or the other. Tank to tank would be impossible.
I found the guy'* post. This is from a Chrysler Sebring forum:

Quote:
I have a 2002 LXi and switched over to Royal Purple synthetic oil and I went from 23 mpg city / 26 mpg highway to 26/30. It took awhile for this to happen, but it did. I would strongly suggest switching over to synthetic of some type.
He said it took a while to do that...so I'm assuming if his mileage increased it wasn't because of the oil.

Is synthetic oil a lot more expensive? Since I'm poor I won't switch now, but I'm going to start changing my own so I'd save money than if I went to a shop.
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Old 07-06-2005, 01:38 AM   #36
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That'* a joke. It could have been the simple change from winter to summer mix in gas, or temperatures. No lubricant for automotive use could ever produce those results. If they could, wouldn't it make headlines?
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Old 07-06-2005, 01:52 AM   #37
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Quote:
Originally Posted by willwren
That'* a joke. It could have been the simple change from winter to summer mix in gas, or temperatures. No lubricant for automotive use could ever produce those results. If they could, wouldn't it make headlines?
Hell yeah it would make headlines, and probably EVERYONE would be using synthetic too. I'd pay the extra money for the oil if I could improve my mileage by nearly 16%
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Old 07-06-2005, 02:03 AM   #38
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No kidding there. Some people will make any claim to give themselves credibility when they're lacking in general car knowledge. That'* what you ran across this time, Pete.
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Old 07-06-2005, 03:00 AM   #39
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Quote:
Originally Posted by willwren
No kidding there. Some people will make any claim to give themselves credibility when they're lacking in general car knowledge. That'* what you ran across this time, Pete.
Yep, and surprisingly no one else in that thread debated that claim ... makes me wonder...
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Old 07-06-2005, 07:56 AM   #40
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Originally Posted by L27Buick
man im so scared of my intake failing i really dont wanna spend all that money at a dealership and i cant drive a broken car to my dads across state to fix it either.
There is an alternative to waiting for it to fail. Unfortunately it'* taking it apart when it doesn't have a problem.

You could take your time, buy the parts...and when you are home for a weekend/week go to it with Dad and have some father/son time.
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