mobil1 5w30 wtf? - Subaru WRX Forum
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post #1 of 34 Old 09-17-2007, 12:59 AM Thread Starter
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mobil1 5w30 wtf?

ok I have used mobil 1 for the past 2 years in my eclipse, now i put it in my 7000 mile 2007 wrx and at first it ran a little wierd, i had to give the car a bit more power to get going and it burned oil in about a week, i had to add an extra qt. I let the car warm up 1 minute and drive slow for the first 5 minutes of driving before i decide to even punch it just a little bit to 5k rpms, today i was running some errands and decided to speed here and there between freeway's and now i needed to add an extra quart. After hours of reading I finally decided im done with mobil1 5w30 for this car, there are just as many bad posts about it as there are good posts, so now im just here wondering if this combo seems good

Redline 10w40
Pureone oil filter

if you have something better in mind let me know ill take it under consideration.
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post #2 of 34 Old 09-17-2007, 04:39 AM
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well im not burning but what i have noticed is an occasional smoking under heavy boost.
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post #3 of 34 Old 09-17-2007, 10:42 AM
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ive run moblie 1 for pretty much the life of the car ( 78,000 miles so far) and had no problems. how many quarts did you put in after the oil change

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post #4 of 34 Old 09-17-2007, 12:30 PM
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It's always been my understanding that your not supposed to put synthetic in a new car until it reaches 10k miles. This allows the engine to properly break in.
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post #5 of 34 Old 09-17-2007, 01:02 PM
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I switched to mobile 1 after 3000 miles, and its never burnt any oil or had any problems.
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post #6 of 34 Old 09-17-2007, 01:13 PM
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My tuners are part of Subaru Canada's Rally Team ... I was having smoking issues with my02 wrx. First thing they asked was if I used Mobile 1 at any time. After explain that I have never used Mobile 1 in the Suby we discovered that my smoking was coming from the oil seal within the turbo. Anyways ... long story short, They tell me that all the Suby's that they have/use/abuse all use ELF 10W50 which is a full synthetic during the hot summer months and suggest not using any other brand. Little bit more expensive but worth every penny!
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post #7 of 34 Old 09-17-2007, 03:22 PM Thread Starter
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do you thinks its worth trying redline 10w40 or should i stick with 5w30 but instead use redline?
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post #8 of 34 Old 09-17-2007, 04:24 PM
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Redline oils are great in fact i sell them in my shop. A lot of it has to do with weather conditions. where I am during the summer tends to be hot and humid ... 10W50 or the 10W40 should be fine. in winter when its DAMN COLD I would use 10w30 or 5w30 full synthetic.
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post #9 of 34 Old 09-18-2007, 12:57 AM Thread Starter
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would you recomened 10w30 or 10w40 for a stage 2 wrx? the temperature here ranges from 65 degress in the morning to maybe 80-100 in the afternoon but lately its been in the 80's

thats for redline btw
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post #10 of 34 Old 09-18-2007, 01:45 AM
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Somebody on my local forum just posted these test results...makes me regret changing to Mobile 1 last oil change...
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post #11 of 34 Old 09-18-2007, 02:51 AM Thread Starter
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i cant read it, its too small lol, give me a summary what it says on royal purple. mobil1, and redline
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post #12 of 34 Old 09-18-2007, 04:31 AM
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^^^^^^^^ hell you dont need to read it just look at what it does......now i am pissed
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post #13 of 34 Old 09-18-2007, 10:34 AM
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ANyone know where that comparison came from?

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post #14 of 34 Old 09-19-2007, 11:33 AM Thread Starter
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not sure, i need to change my oil soon im at the 2800 mark, still deciding between 10w30 and 10w40, after seeing that post i want royal purple but i thought royal purple is only gl-4 rated and we needed gl-5 rated oils
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post #15 of 34 Old 09-19-2007, 12:24 PM
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I use Royal Purple in my STi and I love it. I switched from Mobile 1 and I won't go back. The car seems alot "happier" and more smooth than when I was using Mobile 1. It is expensive (about $7-$8 a qt) but worth it in the long run.
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