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Old 10-02-2002, 02:20 PM   #1
Speedy02wrx
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Default Is it better for me to switch to synthetic?

I hit 20,000 miles today and I've been using quaker state 5w30 in my wrx since the day i bought it. Last oil change i took it to the dealer and they switched me to valvolin 10w30. My car runs very strong it hit an 8.8 at 77 mph in the 1/8 with boost set at 14psi and a cat back. I wondering if i should switch to synthetic to reduce wear on my motor what do you guys think? Also what brand do you guys recommend to use? i see alot of mobil 1 5w30, 10W30 and alot of people using red line.
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Old 10-02-2002, 02:26 PM   #2
Speedy02wrx
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sorry guys i accidently posted this here but any replies would be apreciated.
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Old 10-02-2002, 02:27 PM   #3
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most synths handle the high heat of turbo's better than standard dyno oils, so it wouldn't hurt to do the switch. I personally run Mobile 1 in my car.
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Old 10-02-2002, 02:31 PM   #4
Speedy02wrx
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are you using 5w30 or 10w30?
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Old 10-03-2002, 01:42 PM   #5
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From what I hear, once you use RedLine, you can't turn back because of the pureness of the. Sucks having to keep buying $6 - $9 per qt of oil.

I personally use Vavolin Full Syn. on my subie. I personally think it runs a lot better than the Mobil 1s.
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Old 10-03-2002, 04:10 PM   #6
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Quote:
Originally posted by Speedy02wrx
are you using 5w30 or 10w30?
10w. Prolly switch to 5 for the winter tho.
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Old 10-03-2002, 05:54 PM   #7
neurotic
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Been running Amsoil 0w30 since I got my car, smooth as butta.
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Old 10-04-2002, 04:58 AM   #8
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dude im in love w/ the royal purple
so try it
ever time i get and oil chg they call me to the shop cause they
say the oil looks new after 5000 mi its full synt no bull *****
red line sucks as*80$ oil chg it only last 2 wks of good performance.
ROYAL PURPLE
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Old 10-04-2002, 05:49 PM   #9
krzyxrevver12
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ROYAL PURPLE!!!!!
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Old 10-04-2002, 09:21 PM   #10
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I'm getting there too, i want to switch to synthectic at my first oil change.....i'm thinking 1500 miles, and i'm at 1015 right now...


I'll prob go either Mobil Fully synthetic or Penzoil Synthetic.....what do you all suggest for 5w30, or 10w30....
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Old 10-04-2002, 10:02 PM   #11
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I use Mobil 1. 10w30 in the summer and 5w30 in the winter.
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Old 10-04-2002, 10:29 PM   #12
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I may be the only one but I use Castrol Syntec 10w-30. I used to run the castrol Dino oil in my old Jeep never had a problem with it using much oil(the odometer was at 170k when I sold it, and it was on 33" tires for about 30K and 31s for about 30K so who knows how many miles were really on it)so I stuck with it in the Suby, just went to the Synthetic for its higher heat tolerences. Btw I switched at 3K miles cause of the ongoing debate over breaking it in on Dino, I figured how much can another 2k miles hurt anything, better to be safe than sorry.-James
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Old 10-04-2002, 10:40 PM   #13
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Castrol Sytec 5w30 full synthetic.


Happy motor.


-T
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Old 10-04-2002, 11:55 PM   #14
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Glad to see I'm not the only one. you forgot the n in Syntec, I did the same thing but went back and edited it before antone saw it. Great minds think alike.jk -James
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Old 10-05-2002, 09:41 AM   #15
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Quote:
Originally posted by brakemans
I personally use Vavolin Full Syn. on my subie. I personally think it runs a lot better than the Mobil 1s.
What? It "runs better"? Please elaborate.
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Old 10-16-2002, 02:08 PM   #16
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Default Group Stock Info

Castrol Syntec is not technically synthetic oil. It is highly refined conventional oil. (Group III base stock.) In fact most American oils are Group III. Mobil 1, and Amsoil is Group IV (true synthetic) and Redline, Royal Purple, Motul,etc is Group V (Even more synthetic!! )

THat doesn't mean it sucks, but you should change it every 3k miles like conventional oil.
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Old 10-16-2002, 02:32 PM   #17
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where did you get this info from? I am wondering how they can get away with saying it is entirely man-made and produced from "a special synthetic base stock" if they are just refining dino oil, are you sure your not talking about syntec blend?-James
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Old 10-16-2002, 09:27 PM   #18
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After seeing so many different answers lets vote.
What is the best synthtic oil?
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Old 10-16-2002, 09:59 PM   #19
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If you've got the bux get a fully synthetic oil in your favorite flavor - Redline, Motul, Royal Purple, Vollesynth (or however they spell that, OEM in bimmers) there's a few more out there. Get what's easiest of those to find if you want the best, but plan on at least $6 a quart. You'll notice the car will be a *tad* (depends on how hard you want it more responsive, definately quieter in the valvetrain (you'd notice this too with "lesser" synths like the NEW Mobil 1, Syntec's and what not), maybes on the MPG increase, a bit smoother rev in the 6-7k range, and a lot of peace of mind when you hammer it. The other "synths" are probably better than normal dino juice, I don't use them. As far as normal oil, not sure, but I DO know that Quaker State has a very poor reputation as junk from the V8 guys (sludge build up you could sink a finger into). I think it's a PITA to change your oil every 3k or less at $20 a pop (most people don't change their own oil because of disposal reasons and the hassle with that), than every 8K to 12K for $50 ($35 oil/$15 to change). I think it's worth it after peering into more than a few of my engines after running Redline for few hundred-thousand combined miles.
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Old 10-17-2002, 10:28 AM   #20
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Quote:
Originally posted by jjunior887
where did you get this info from? I am wondering how they can get away with saying it is entirely man-made and produced from "a special synthetic base stock" if they are just refining dino oil, are you sure your not talking about syntec blend?-James
Try these links for info

http://www.klinegroup.com/Press/6_20000504.htm

Quote:
Until recently, PAO was virtually the only basestock allowed to wear the “synthetic” label. This was changed, however, when the NAD was asked to challenge Castrol’s use of the “synthetic” label on its reformulated PCMO made with Group III. A ruling in favor of Castrol was reached, and Group III was unceremoniously accepted into the fold as a “synthetic.” According to Downey, “If, and how quickly other lubricant suppliers replace PAO with Group III, depends in part on the availability of Group III and price stability. However, all signs point to a continuing erosion of PAO’s market share in PCMO.”
Also this is a good link . .

http://faq.f650.com/FAQs/OILFAQ.htm#...%20%93Facts%94

Basically, at this point, if you're paying less than $5 a quart, your not using a 'true' synthetic. I'm still trying to find out if Mobil 1 new "Supersyn" is now Group III or a Group III and PAO blend. I'm already reseraching Amsoil and Motul at this point. I think I might move to Amsoil.
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Old 10-17-2002, 11:18 AM   #21
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I've been finding the mobil 1 (full) synthetic for $4 a quart since I first switched.

Last edited by JohnGalt00; 10-17-2002 at 11:24 AM.
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Old 10-17-2002, 12:15 PM   #22
tuca33
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I live in Brazil and here is very very hot..
Here we have the motul oil and they have it in 0w30 , 5w30, 10w30 and i think even 15w30..
So wich one to use???
will i need to change it very often??how often???
i have 400KM in my car and want to kno with how many Km i change for the first time???should i change the oil filter too???
Thanks
Tuca
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Old 10-17-2002, 12:43 PM   #23
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Here's a comparison of Amsoil to the new Mobil 1


Amsoil 5W-30 || Mobil 1SuperSyn 5W-30

Viscosity Index (higher is better) 182 || 169
Pour Point (F) (lower is better) -60 || -54
Flash Point (F) (higher is better) 446 || 455
NOACK Volatility (lower is better) 6.9% || 14.98%
Kinematic Viscosity (higher is better) 11.7cSt || 9.7cSt
at 100 C

The main thing I get from this is that Amsoil is more stable across the temperature range (VI and KV), coats the engine quicker in the winter, and has MUCH less boil off issues. Also I hear the additive package in Amsoil is much better than even the latest Mobil 1. It's also twice the price but they gurantee at least 12,500 miles change intervals. (25k mile intervals if you change the oil filter at 12.5k and top off.)

And this is comparing regular Amsoil to Mobil 1 supersyn. Amsoil also have a series 2000 which is supposed to be better. Is Mobil 1 good enough? Probably. But I think the chance of my car hitting 200,000 miles is more with Amsoil. (And probably two turbo replacements )
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Old 10-17-2002, 12:54 PM   #24
tuca33
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So you recomend the Amsoil one??
here in Brazil i am afraid we only have from the good ones MOTUL..
and i was thinking wich to use as there are many..0w30 5w30 and so on..
wich one to use as here is very hot??
Maybe a 10w30??
thanks
Tuca
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Old 10-17-2002, 02:08 PM   #25
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I ran Quaker State 10w-30 and after a year my stock turbo had a leaking seal on the exhaust side. I've switched to a bigger turbo and now use Mobil 1 Tri-syn and have had no problems.
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