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Old 02-23-2006, 04:23 AM   #1
jerzyhxc1161
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Synthetic oil...

Is synthetic oil really as big of a deal as they make it out to be? If so which is the best...Castrol?
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Old 02-23-2006, 04:44 AM   #2
salimander13
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i dont know if its "that big a deal," but it helps your engine run more smoothly giving it a longer life, some better gas mileage, and I presume more power. Castrol has been recommended by lots, but I don tknow which is the best. A downside is the price of it can get a little steep.
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Old 02-23-2006, 06:23 AM   #3
GreekWarrior
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I'm servicing my car soon and I'm puttting mobil synth S in my car, I'm too cheap to buy the really good stuff mobil 1, it costs like $80 bucks ffs! synth S only costs $30. Both are full synthetic oils.
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Old 02-23-2006, 06:31 AM   #4
VG30DE
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Those in the know buy Ams Oil. It isn't any more expensive than regular oil over time because you change every 15000 miles.
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Old 02-23-2006, 09:00 AM   #5
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I've been using Mobil 1 in my lude since I bought it, because thats what the previous owner used, and I guess you're supposed to stay with synthetic once you start using it. Works pretty well, but I do burn a bit of it vtecing, but thats normal for my car.
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Old 02-23-2006, 03:10 PM   #6
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Quote:
Originally Posted by VG30DE
Those in the know buy Ams Oil. It isn't any more expensive than regular oil over time because you change every 15000 miles.
Those in the know aren't stupid enough to go 15k miles between oil changes... EVER. No matter how good an oil is, it becomes contaminated at the same rate, therefore regular oil changes are still a requirement.
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Old 02-23-2006, 04:01 PM   #7
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Quote:
Originally Posted by vwhobo
Those in the know aren't stupid enough to go 15k miles between oil changes... EVER. No matter how good an oil is, it becomes contaminated at the same rate, therefore regular oil changes are still a requirement.

I work in a Pennzoil quick lube, and I have to agree.
Always change it regularly, but since vw didn’t give a time frame I will. Regular oil especially Pennzoil and Quaker state always do every 3k miles, not sure if it's still true for both oils at this point but both were paraffin based which means the base product was bird oils (even if it's not still true, better safe then sorry I always say), now its good at lubing but it brakes down and becomes wax in side the engine if not changed regularly.
As for the other brands of regular oil, probably should be changed every 3k as well.

For semi syn feel free to stretch that to 3500, I use valvoline durablend in my breeze and it’s working very well, but I still only do 3k miles with it.

Now for the full syn stuff, I’ve talked to a lot of customers, fellow Fiero enthusiasts, and we all agree (you may not but those I’ve talked to do) almost all full syn are basically the same, and you should be able to push the oil change to ever 5k miles. I use Mobile 1 in the Fiero because its the name I know and trust, if you trust someone else keep trusting them I’ve heard nothing bad to make me say other wise.

As a little aside the Fiero has been running full syn nearly its whole life when the engine was rebuilt 40k miles ago and since then its seen the track several times, and been on the street several times. When I did its last compression test it was 130/150 across all 8, so even with all that hard driving not seeing any side effects yet.
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Old 02-23-2006, 05:05 PM   #8
jedimario
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Quote:
Originally Posted by vwhobo
Those in the know aren't stupid enough to go 15k miles between oil changes... EVER. No matter how good an oil is, it becomes contaminated at the same rate, therefore regular oil changes are still a requirement.
Doesn't Porsche recocmend changing the oil every 15,000 for their cars at their regualr service trips or something like that?
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Old 02-23-2006, 09:17 AM   #9
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Since I switched to full synthetic on my Accord I consistently get 2-3mpg better than I did befoer on both the city and highway. Plus I change my oil every 7500 now.
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