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This is a discussion on Brands & Types of oil within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; I just bought a case of Castrol Syntec 5W/50. X...

  1. #46
    MisterX's Avatar
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    I just bought a case of Castrol Syntec 5W/50.

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  3. #47
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    Exclamation

    there are alot of good synthetic oils out there. I'm a Castrol distributer; I know it is a good synthetic oil, also Mobil 1 is very good. Redline and Royal Purple are also very good synthetic oils. As far as oil filters are concerned, stay away from Fram filters. I see vehicles come in my shop on a regular basis with fram filters and complaining and sudden drops in oil pressure. We pull off the filters, usually finding that the filter is actually starting to fall apart, piece by piece. Trust me on this, stay away from Fram.
    Also, using synthetic oil after 1000 miles is not going to cause problems with the rings or any of that crap. It is actually recomended by many motor companies, oil companies and 1000's of mechanics all over the world.


    -Kevin

  4. #48
    Registered User MechE's Avatar
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    Thumbs up More Than You Ever Wanted to Know About Motor Oil

    I had one of my mechanical engineering prof send me this link he found. His research studies high speed machines and ludrication. You can read the data in this and come to your own conclutions.

    More Than You Ever Wanted to Know About Motor Oil

    I use modil1 because it has some of the best numbers for flash point, VI and Pour temp. AMSOIL is good also but Mobil 1 is easier to find. A high flash point and VI are important because as we all know turbos are hot and you don't want an oil that breaks down at high temps....my 0.02

  5. #49
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    my 1st oil change???

    should i use regular oil and not synthetic for it? i've always used Castrol oil in my cars, so would it be best to use 5w30 or go ahead with the 5w30 synthetic???
    2003 Aspen White WRX

    Mods: HKS turbo timer, HKS SS BOV, Progress springs, gauge pod & gauges, 17" Konig Holes "graphite"

  6. #50
    Registered User scrapy2's Avatar
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    i used reg. oil for now, some say not to use syn. oil until 10,000 miles so all the seals and eveything else gets some wear on it .

  7. #51
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    type of oil

    I was wondering what was a good type of synthetic oil to use and what grade? How often do you change oil your car when you use synthetic oil?

  8. #52
    Registered User CustomS10's Avatar
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    i use amsoil...what grade depends on where u live and the conditions. if u live in alaska 10w 30 won't work for the winter. ya know. mobil 1 is good too. it's basically between those 2. this can turn into a long thread about mobil 1 vs amsoil
    -Ben-
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  9. #53
    Registered User KanosWRX's Avatar
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    Yeah it can be debated forever probably. I am using Amsoil 10W30 right now (just changed it yesterday) since its warming up here in Virginia and we won't see much below freezing anymore, if at all.


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  10. #54
    Registered User CustomS10's Avatar
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    Originally posted by KanosWRX
    Yeah it can be debated forever probably. I am using Amsoil 10W30 right now (just changed it yesterday) since its warming up here in Virginia and we won't see much below freezing anymore, if at all.
    don't be so sure up here in Mass it was 50 for a week and the forcast for tomorrow and tuesday is snow!
    -Ben-
    Spark it or Park it!

  11. #55
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    im from Los angeles so it doenst snow here. Would 10x30 or 10x40 be good?

  12. #56
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    Originally posted by SpeedRacerWRX02
    don't be so sure up here in Mass it was 50 for a week and the forcast for tomorrow and tuesday is snow!
    Last week we got some snow...today...more snow.

  13. #57
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    personally, I like mobil 1, even though I'm a castrol distributor. but, I wouldn't use anything over 10w-30. subaru built these engines run a light weight oil for a reason. if you start putting 10w-40 or 20w-50 in them it will put more of a stain on your engine(oil pump to be specific). I live in south east georgia. we see 100 degree weather on a regular basis and I still run 5w-30.

    the only reason I'm offering my 2 cents is because I own a quick lube. oil is my life. its what pays the bills.


    kevin

  14. #58
    Registered User element533's Avatar
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    i've heard it go both ways, with no definitive proof either way. i switched to synthetic at 1250. i'm at 5300 now. *shrugs* i guess we'll see.
    Speedometer? Is that the thing next to the tach?

  15. #59
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    Motul is what I have in my rex. They also happen to be the official Subaru WRC oil.

  16. #60
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    Mobile1 15W50
    2003 WRX silver

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