Finally decided to go Synthetic!! - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 02-16-2006, 10:48 AM   #11
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One of the best parts of syn is it doesn't break down quickly. Therefore your pressure will be more constant.
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Old 02-16-2006, 01:02 PM   #12
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I change mine every 2 months, but that is about 10,000 kms per change. I usually check it at 5,000 kms and it still looks almost like new.
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Old 03-01-2006, 12:45 AM   #13
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I hesitate to post on threads like this, because there is so much misinformation out there. I've been using AMSOIL synthetic products since 1983. I currently have six vehicles in the "fleet". The oil is changed at one year or 25k miles, whichever comes first, with the filter changed at half that.

A cam bearing gave out on our '90 SSE at 200k miles. We got the car at 104k miles, at which time I converted it over to synthetic. I haven't taken the engine apart yet to determine exactly how the bearing failed, but from what I have gathered, it isn't "oil related". Did I mention it started life as a rental?

I could go on & on about other longevity stories, but there will always be someone who will say, "My engine went that long on regular dyno juice." Of course, there'* no way to verify either one of our stories (although I will only tell the absolute truth), but I certainly have spent a lot less money and time on oil changes over the years than those following the majors' change recommendation.

But, I hesitate to post on threads like this. . .
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Old 03-02-2006, 04:37 PM   #14
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Quote " with the filter changed at half that"

Just curious do you just take it off with oil spewing all over and put new one on,maybe dumb question but it does sound like a good idea.
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Old 03-02-2006, 10:54 PM   #15
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I'm not exactly sure what you mean, but I put a pan under the filter. The location of the filter, which is over the frame, makes it so oil drips right out of the engine, overflowing the filter, running on the frame, and into the pan, making a slight mess.

When I put a new filter on, I lubricate the gasket, and fill the filter as much as I can, then it gets screwed back on.
Filling the filter isn't really that neccessary. On side mounted filters, you can't do it.

I put synthetic in there, for several reasons. One is it doesn't break down, foam, etc. I put alot of kms on my Buick, and sometimes, I like to have a little fun with the engine while driving. It just gives me peace of mind.

No leaks so far, works well.
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