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Old 01-28-2004, 07:44 PM   #1
flyingmachine
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Default With 1100 miles, is my car ready for synthetic?

Ready for my 1st oil change on the OBS, should I put in synthetic? Tks!
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Old 01-28-2004, 07:50 PM   #2
Longfury
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from what the all knowing Porter told me is that u should wait till around 15K before doing the switch. I am waiting and i am gonna do the switch around 15K to mobil 1,maybe motul if i feel like spending alot
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Old 01-28-2004, 07:56 PM   #3
capecod_wrx
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i'm waiting too...

which reminds me that i need to do some searches about synthetic.

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Old 01-28-2004, 08:02 PM   #4
AXXE
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I put it in on my first oil change. I have a 2002 WRX. Everything is fine. Uses no oil. I use Mobil1.
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Old 01-28-2004, 08:09 PM   #5
SAND_MAN1
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Wait, service advisor recommended waiting until you hit 15k.
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Old 01-28-2004, 09:07 PM   #6
randolph-rs
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you're saying wait till 15,000 miles?
If that's the case then it'll be 1.5 to 2 years for some of us.
I was planning to do it at the first oil change.
Also, for what it's worth a co-worker of mine is an engine builder and he recommends synthetic from day one.
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Old 01-28-2004, 09:12 PM   #7
flyingmachine
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15K it is then
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Old 01-28-2004, 09:15 PM   #8
SubEd
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Might as well wait a bit. Those who say "I have no problems" also don't have 100k miles yet.
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Old 01-28-2004, 09:34 PM   #9
cyrus923
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Mobil one is a great oil, but from my understanding with the ej20 pistons being horizontal, aka boxer engine, full synthetic oil is not the greatest to have due to the oil running off the pistons too fast. A synthetic/oil blend was relayed to me by the Subaru service and by many owners. I myself just use regular oil still, but if you want the best synthetic go Royal Purple. It will cost you a lot but its a good synthetic to put into the engine.

Justin
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Old 01-28-2004, 09:39 PM   #10
Stanley
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I switched at 10K on the WRX. I'll let y'all know how it runs in a few years when I turn 100K miles. If I owned an OBS, I'd be running dino unless I was piling on a ton of miles in a short period of time and wanted to extend the mileage interval.
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Old 01-28-2004, 11:28 PM   #11
bigpaulo
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Quote:
Originally posted by cyrus923
Mobil one is a great oil, but from my understanding with the ej20 pistons being horizontal, aka boxer engine, full synthetic oil is not the greatest to have due to the oil running off the pistons too fast. A synthetic/oil blend was relayed to me by the Subaru service and by many owners. I myself just use regular oil still, but if you want the best synthetic go Royal Purple. It will cost you a lot but its a good synthetic to put into the engine.

Justin
If synthetic oil was bad news for boxer engines, rest assured that Porsche would not spec and deliver all their cars with Mobil1 in the oil pan.

As for the best synthetic being Royal Purple, go to www.bobistheoilguy.com and check out the forums, especially the used oil analysis section. Search for Subaru. You'll see that all modern Subies, turbo and normally aspirated, have incredibly good wear numbers in their UOAs. With run of the mill petroleum based oils... and even with synthetic oils

I switched to Castrol 5W-30 at 3750 miles, then a steady diet of Mobil1 5W-30 ever since. I'm around 28000 miles now, and in any 3750 mile interval, it'll consume no more than 200 ml (about 1/5 of a quart). I never bother to top it up, I just keep an eye on the level and change my oil then. YMMV.
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Old 01-28-2004, 11:32 PM   #12
Hondaslayer
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Wait til 15k to switch to synthetic.
Leave that oil in there until 3,500 mile mark!
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Old 01-28-2004, 11:43 PM   #13
collegedropout
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1st change at 1200 with Valvoline. Then Castrol at 3400. I switched at 6000 to Mobil 1. Every change since with Mobil 1 and seems better than new.
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Old 01-28-2004, 11:48 PM   #14
Sublime5260
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i dont think its necessary to wait till 15k...i would wait till about 9k and everything should be fine.
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Old 01-28-2004, 11:59 PM   #15
flyingmachine
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Just did the oil change w/ valvoline 5-30(non-syn), and I noticed that the oil from the factory is really thin. I mean, that stuff gushed out like water almost. Albeit, the car was warm, but I've never seen 5-30 being that runny b4. The oil was also really dirty, a nasty brown color. This isn't a problem is it?
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Old 01-29-2004, 12:00 AM   #16
PARANOID56
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and dont forget that the evo comes with synthetic from the factory. I swtiched at 3k, just do it
Shane
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Old 01-29-2004, 12:10 AM   #17
collegedropout
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adds to the douchery
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IMO: Valvoline runs like water, Pennzoil comes pre burnt, and Castrol likes to turn really really black. Mobil 1 is hard to burn. That is just what I have noticed while doing oil changes to my beater.
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Old 01-29-2004, 01:20 AM   #18
InfamousDX
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Switched to Mobil 1 at 1,000 miles and now I'm at 15K miles and all is well.
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Old 01-29-2004, 12:44 PM   #19
Lightndattic
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Quote:
Originally posted by InfamousDX
Switched to Mobil 1 at 1,000 miles and now I'm at 15K miles and all is well.
Same here and I'm at 23K in 10 months.
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Old 01-29-2004, 12:53 PM   #20
STINV
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switched to mobil 1 syn after 6k miles
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Old 01-29-2004, 01:10 PM   #21
craigmp50
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I switched @ 1500 miles, Mobil 1 5/30. I now have 10,000 miles and don't burn a drop.

there's a reason that the Vette & Viper (among others) both come from the factory with Mobil 1.
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Old 01-29-2004, 01:14 PM   #22
Rebellion
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i'll switch after my warranty runs out. synthetic should be able to last far more than 3750 miles, but I need the maintenence records to back up the oil changes.
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Old 01-29-2004, 01:25 PM   #23
craigmp50
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On my 2004 Subaru requires 7,500 mi. intervals, I do mine @ 5000.
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Old 01-29-2004, 01:52 PM   #24
SubyTechMaster
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My advise; Wait till 10,000 miles. Most engines will not actually "break-in" until 3,000 to 4,000 miles and you will notice a differance when it happens. But you know what they say about giving advice - "Wise men don't need it and fools won't heed it"
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Old 01-29-2004, 01:58 PM   #25
switchWRX
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I did the swap to synthetic at 25,000 miles.
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