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Old 12-26-2006, 02:10 PM   #1
XC5VETTE
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Oil Filter Change Frequency

I'm told synthetic oil doesn't really wear or break down as quickly or to the extent organic oils do. However, I understand it does get just as dirty as any oil will.

So, while I beleive the synthetics are far superior to organic oils....and I think it's a waste to change more frequently than needed....I'm old enough to have that old 3K oil & filter chnage burned into my brain and want to be more conservative and change more frequently than recommended.

So here's what I'm thinking...let me know what you think. Barring any extenuating circumstances (track use, extremely dusty conditions etc.) I'm going to change the oil as recommended by the Oil Index Indicator....but change the filter only in between (oil changes) or at 50% oil life. That way, I'm fully using and not wasting the full capability of the oil....in accordance with the manufacturer...with just a touch of conservatism. The filter change will remove all contaminants at the half way point thus reducing/minimizing engine wear.

Well, what do you think....pro or con.....
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Old 12-26-2006, 03:19 PM   #2
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The oil filters holds close to a pint. I like to change all of the oil possible when changing, donít see much point in staggering oil and filter changes.
JJ
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Old 12-26-2006, 03:31 PM   #3
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Quote:
Originally Posted by jjmalone2001 View Post
The oil filters holds close to a pint. I like to change all of the oil possible when changing, donít see much point in staggering oil and filter changes.
JJ
Perhaps some clairification....I didn't mean stagger so much as increase the filter change interval. Change just the filter at 50%....then all oil AND filter at 0%.

Does that make more sense to you...?
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Old 12-26-2006, 05:47 PM   #4
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my opine its a little over kill but ya sure wont hurt anything
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Old 12-27-2006, 02:34 PM   #5
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You can go overboard but you will always find that the oil and filter are much cheaper than repairs. OK, its under warranty, so no sweat, why worry if the engine craps out ? Well, do you remember the tech who works at the dealership.....do you want him taking your motor apart ?

Last year I took my 05 in for a clutch problem. Got the car back and after one day in the garage found a puddle of oil coming out of the rear end. Car had been in for 8 days and was returned filthy. I washed the car before taking it back. 9 days later, I get the car back again so they (Jim Rathmann Chevrolet) can tell me it was an itty bitty little seal that was bad. They had parked the car under a tree so every friggin sea gull in Florida could come over to perch and shit on the car. I get it back and ask them why the car is covered with bird shit, and the service writer looks back at it and says "do you want us to wash it tomorrow ?" Nope, I wasn't bringing it back or leaving it. So, can you change oil too often ? I don't think so. An ounce of prevention is worth a pound of cure.
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Old 12-27-2006, 02:39 PM   #6
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Quote:
Originally Posted by XC5VETTE View Post
I'm told synthetic oil doesn't really wear or break down as quickly or to the extent organic oils do. However, I understand it does get just as dirty as any oil will.

So, while I beleive the synthetics are far superior to organic oils....and I think it's a waste to change more frequently than needed....I'm old enough to have that old 3K oil & filter chnage burned into my brain and want to be more conservative and change more frequently than recommended.

So here's what I'm thinking...let me know what you think. Barring any extenuating circumstances (track use, extremely dusty conditions etc.) I'm going to change the oil as recommended by the Oil Index Indicator....but change the filter only in between (oil changes) or at 50% oil life. That way, I'm fully using and not wasting the full capability of the oil....in accordance with the manufacturer...with just a touch of conservatism. The filter change will remove all contaminants at the half way point thus reducing/minimizing engine wear.

Well, what do you think....pro or con.....
i change my mobil1 once a year and change the filter every 4000 miles. sometimes i get 16,000 miles on the oil change. this is on my silverado with 130,000+ miles and the engine is quieter than my 2005 corvette engine
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Old 12-27-2006, 07:19 PM   #7
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Best bet is to follow owner's manual instructions...after all it's written by the company that produced your car.

I recall Dave Hill saying "use your onboard oil percentage indicator for oil change requirements," or words similar.
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Old 12-27-2006, 09:30 PM   #8
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Thanks

You guys are great.....I was expecting a very different response. I've read threads where people are changing at the first 500 miles, etc., etc..and it goes from there. You all seem much more practical if not pragmatic.

Thanks for all the feed back! I know what I'm gonna do!
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Old 12-28-2006, 04:28 AM   #9
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A little off the main theme here, but I've got a question on how to drain the oil from the Z. I was told at NCM where I picked up the car that you drain the oil from the two plugs on the pan of the engine. Does that drain the dry sump reservoir completely or is it necessary to drain the oil reservoir as well ?

I was going to ask the guy who had problems pulling his oil filter off due to GM torquing the crap out of it during mounting, but he was so pissed he put a curse on that worker's family.

Also, old school says drain the oil at around 1500 miles on a new engine. I've always done that but has that proven to be beneficial, especially with synthetic oil ?
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Old 12-28-2006, 05:43 AM   #10
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My thoughts.

If saving the money by extending your oil changes beyone your normal interval then this will accomplish that.

Personally though my time is more valuable than the savings of extended oil changes and if you are the same then the process of getting to the oil filter to replace it you have already invested about 70% of the time it would take you to do a complete drain and fill.
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Old 12-28-2006, 09:33 AM   #11
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You are wasting your time. As the filter collects particles it does a better job of filtering. Follow what GM recommends and you will be fine.
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Old 12-28-2006, 10:53 AM   #12
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Quote:
Originally Posted by painrace View Post
You are wasting your time. As the filter collects particles it does a better job of filtering. Follow what GM recommends and you will be fine.
if your engine still has a oil filter bypass valve as the filer area become less and less open more dirty oil goes thru the bearings till the pressure on both side of the valve equalizes. the dirtier the filter the longer this takes

Last edited by motorman; 12-28-2006 at 02:08 PM.
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