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Old 01-29-2007, 06:03 PM   #1
subeesteve25
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05 wrx. I use royal purple 5w30 in my car here in so. cali. I accidently bought royal purple 5w20 this time. is it ok to use this or what. whats the difference. thanks.
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Old 01-29-2007, 06:21 PM   #2
subeesteve25
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anyone? please help. want to do oil change now
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Old 01-29-2007, 06:30 PM   #3
subeesteve25
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man can someone answer my question. thanks.
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Old 01-29-2007, 06:37 PM   #4
FD777
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I personally wouldn't use it. I don't use anything thinner than an Xw-30.
The difference is: the 5w-20 is thinner than 5w-30.
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Old 01-29-2007, 06:40 PM   #5
subeesteve25
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thanks ill go exchange it
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Old 01-29-2007, 06:50 PM   #6
blatant
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you drive that type of car and need to ask that question, jong.

go to walmart and buy their fully synthetic 5w30.













i'm just messin with ya man, i wouldn't use it, stick to spec.
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Old 01-29-2007, 07:38 PM   #7
Hayes
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+3 for getting the correct viscosity.
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Old 01-29-2007, 09:26 PM   #8
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do you lose oil in between changes? if so you can even step it up to 10-40.... i run the 10-40 RP in the winter time and a 20/50 blend in the summer.

www.blackstonelabs.com FTW.
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Old 01-30-2007, 03:47 AM   #9
HighRevimpreza
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how many miles do you have on your car? Motul FTW
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Old 01-30-2007, 03:54 AM   #10
Uncle Scotty
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Quote:
Originally Posted by Hayes View Post
+3 for getting the correct viscosity.
...and just EXACTLY what IS THAT??????

Please....lets hear it????


WHICH 'correct' viscosity????

There are MANY 'correct' ones.
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Old 01-30-2007, 08:48 AM   #11
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Quote:
Originally Posted by Uncle Scotty View Post
...and just EXACTLY what IS THAT??????

Please....lets hear it????


WHICH 'correct' viscosity????

There are MANY 'correct' ones.
One that is NOT 5W20.

Since RP 30 weights tend to shear to a 20 weight rather quickly, I would use 10W40 year 'round if you want the best protection. If you favor a minor increase in gas mileage over better protection, go with the 5W20.

-Dennis

Last edited by bluesubie; 01-30-2007 at 08:53 AM.
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Old 01-31-2007, 07:35 PM   #12
hondaeater69
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Quote:
Originally Posted by bluesubie View Post
One that is NOT 5W20.

Since RP 30 weights tend to shear to a 20 weight rather quickly, I would use 10W40 year 'round if you want the best protection. If you favor a minor increase in gas mileage over better protection, go with the 5W20.

-Dennis

this is line with the way my car responds to RP. BUT, everyone's car is different. that's why i suggested blackstone labs, between having your oil analyzed and watching for consumption issues, you can find the "right" viscosity, which varies from not only region/area, but car to car also.
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