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  #1  
Old 04-23-2009, 02:02 PM
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Default Synthetic oil change?

Hey guys, I recently bought my s80 from a man that had it since it came new off of the lot. It is a 2000 with about 114k on it. He has been using non synthetic since he bought it. I prefer synthetic, but I have heard it is bad to change. Can anyone chime in on this? Good idea or bad idea?
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Old 04-23-2009, 02:37 PM
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The rumour that it is bad to change is a complete fallacy.. there is no risk whatsoever in switching, and it can only benefit the car in the long run.

http://www.carbibles.com/engineoil_bible.html

read up there about it.

I would use synth and if the car is turbo do the oil changes 3000-4000 miles, if it is NA I would go 4500-5000 or so.
Right now I personally use Mobil1 10w-30 High Mileage but thats because of a RMS leak, not because i'm burning oil or anything. (i'm on 111,000 miles)

Personally, it doesnt matter which synthetic you choose, they are all better than conventional dino oil,
The best deal right now is the Quaker State Q horsepower, $18 in walmart and then you can file for a $10 rebate online.. $8 for 5 qt's of synthetic? quite good.. just remember that this car takes something like 7.4 qt's so an oil change isnt as cheap as it would be on other cars..

Normally I use about $40 worth of Mobil1 per oil change (plus cost of the filter)..
Now on to the topic of filters, its generally agreed that sticking with the OEM (mahle or mann) is probably the easiest and best bet..
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Old 04-23-2009, 03:23 PM
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Quote:
Originally Posted by nicolaselias View Post
Personally, it doesnt matter which synthetic you choose
Just to put my 2 cents in.....Dont be fooled by the syn/blend types....go with FULL synthetic.
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Old 04-23-2009, 03:37 PM
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well I should have stated myself more clearly
"Personally, it doesnt matter WHAT BRAND synthetic you choose..

I didnt mean to say "which" implying that anything other than full synthetic would do.. I would never see the logic anyway, most syn blends are almost as expensive as syn..
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Last edited by nicolaselias; 04-23-2009 at 08:36 PM.
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  #5  
Old 04-23-2009, 07:12 PM
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I was probably just going to do Mobile. I had a Benz before this that took synthetic, so I know its costly...
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Old 04-23-2009, 08:36 PM
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Yea, Mobil1 (no e in Mobil) is my personal choice, but there are many excellent products out there.. Of course, walmart has the best pricing, don't pay a cent more elsewhere...
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Old 04-23-2009, 09:00 PM
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use synthetic, but hey nicolaselias, why such short oil changes on synthetic ? with a proper oil filter im sure you can push 10.000 KM

a lot of guys on bobistheoilguy.com do oil analysis to determine if they can push their OCI (oil change interval even longer to 15.000Km or even 20.000 km/ or once a year)

my turbo burns a little oil so i dont push it more than about 6.000 Km on castrol syntec, i have the chance to switch to Lubro Moly synthetic which is a group 4 synth in their 10w40 version, or thats what i read at least
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Last edited by andrei3333; 04-23-2009 at 09:02 PM.
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Old 04-23-2009, 11:28 PM
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Well Andrei, your 6000km = 3720miles so within my range for turbos..

For the NA, I have taken it as high as 6000 miles but I dont see the point, oil is fairly cheap to change, even if you dont do it yourself. I go to tuffy near here (one of those quick lube places), walk with my own filter $5, own oil $40 and pay them $10 to change it and dispose.
Better to change oil too often that have to do some constly engine repairs.. I suspect that the prior owner didnt pay too much attention to his oil, maybe overfilling a few times, lead to my ruptured RMS.. just a suspicion cause I dont want to blame bad luck.

Castrol Syntec is a great oil, use it on my accord back home, but for $1 more per 5 qt bottle, i'll pay the extra for Mobil1. RE: the Lubro Moly, how much are we talking in terms of price difference? Also, isn't it recommended that you stick to 5w-30 or so for the cold up there in Canada? at least for winter?
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  #9  
Old 04-24-2009, 01:22 PM
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I was a oil jobber back in the 60's yea I know before some of you were born. But then we changed oil every 1200 miles. Syn was not even heard of then. I now use castro 5w 20w and change my oil every 3500 miles without fail. Cannot bring myself to go past this I just rather change more often and go with a good oil than use a syn for much higher price and run it longer.
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Old 04-24-2009, 02:58 PM
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well you might say a much higher price, but say castrol gtx vs castrol syntec, the synthetic is about 50% more cost.. but with that you can reasonably run the oil 50% longer.. Im not saying to go for some crazy drain intervals like 7500 or 10,000 miles with it, but instead of changing at 3500, its not a problem to go to 5000, thus negating the extra cost and paying back for itself.
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Old 04-24-2009, 02:58 PM
 
 
 
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10, 1999, 2008, c70, change, changevolvo, intervals, oil, quaker, rebate, recommended, state, synthetic, volvo, xc70


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