Motul oil - Subaru WRX Forum
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post #1 of 13 Old 11-19-2016, 06:33 PM Thread Starter
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Motul oil

Just got my first WRX in June, just did my first oil change on it. I put motul 8100 in it. Do any of you guys have good luck with motul in WRX's? I run motul in my motorcycle as well.
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post #2 of 13 Old 11-19-2016, 06:55 PM
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Motul seems to be the one oil consistently recommended by everyone. Keep doing it!

I don't have any around and have to order online. My built motor recommends it as the oil for every change.
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post #3 of 13 Old 11-21-2016, 05:40 AM
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Motul 5w40 X-Clean is what i use.

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post #4 of 13 Old 11-21-2016, 08:33 AM
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A lot of people run Rotella T6 5w40. It says it's for diesel engines, but it works just fine for me. And it's SIGNIFICANTLY cheaper. Only annoying part is it (usually) comes in gallons instead of 5L bottles, so you have to get 2 to do a full change. Or just find somewhere that stocks the boxes of quart bottles and you are set.

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post #5 of 13 Old 11-21-2016, 10:53 AM
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I just changed my oil with Mobil 1 High-Mileage Full synthetic 5w-30, as that is what my manual recommends. (80,000 miles on the clock). I live in Ohio where temps range from 0F-90F. Is there any reason to move up to a 5w-40? That's essentially just a thicker oil, which should stand up to high temperature better, right? Should I consider a different weight as it gets colder?
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post #6 of 13 Old 11-21-2016, 11:39 AM
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typically you want a lower weight in the colder months to help with the oil being too thick an no being able to lubricate properly.

05 WRX Wagon - 409 AWHP / 334 WTQ Wicked Matt Tuned
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post #7 of 13 Old 11-21-2016, 12:22 PM
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So consider 5w-40 during the hottest months of summer and 5w-30 for winter / the rest of the year?
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post #8 of 13 Old 11-21-2016, 12:31 PM
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im no expert in this but yes that's what I do

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post #9 of 13 Old 11-22-2016, 05:42 AM
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its the other way... 10w30 for summer 5w30 for winter. you are correct for being lower, just lowered the wrong number. there will be no real difference between a 5w30 and 5w40 in winter. the 5W is the cold temp rating so to say.

i mean obivously they are different, but im generalizing here.

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post #10 of 13 Old 11-22-2016, 06:48 AM
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yeah sorry I go from 10w 40 (summer) to 5w 40 (winter)

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post #11 of 13 Old 11-22-2016, 08:08 AM
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My owners manual / oil cap calls for 5w-30. Everything I'm reading online have people recommending (x)w-40 in WRXs. Would there be any benefit to switching to a (x)-w40 or should I just stick to what it says in the owners manual?

x= 5 for winter, 10 for summer

80,000+ on the odo if it makes any difference.
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post #12 of 13 Old 11-22-2016, 08:56 AM
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40 is a little thicker when at operating temp I believe. It was recommended for me to use it so that's what I did and haven't looked back. Been doing great an so far no issues when it comes to the oil!

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post #13 of 13 Old 11-22-2016, 02:34 PM
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honestly untill i swapped motors... i used rotella t6 5w40 all year around. i only switched because of one sentence someone i respect and trust told me.

"ya sure rotella is a great oil, but its manufactured as a diesel oil, and find me a diesel that revs over 5k"

so i switched to motul for my 8k revving ej207 at the recommendation of my tuner. mind you i know a few people with 207's and still running rotella t6 and they have no complaints.

subaru recommends 5w30 because they assume everyone abides by the law and does the speed limit and doesnt give it more than 50% throttle...basically manufacturers think we all drive like grannies. the 40 weight that everyone uses is because we beat on our cars. its a boosted awd street machine... we drive them like so, and you will want the thicker/heavier oil to withstand the heat and the poundings.

my wifes honda pilot says 5w20 on the cap and i couldnt ever see anyone ever putting oil that thin into a car that isnt some sort of purpose built engine that isnt in a daily driver. her dad is a mechanic so she gets free oil changes but where he works doesnt have rotella on tap or else i would probably just use that aswell. its cheap and good stuff.
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Last edited by titter; 11-22-2016 at 03:51 PM.
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