Synthetic oil ? - Club Crosstrek | Subaru XV Crosstrek Forums
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Old 09-24-2015, 03:38 AM   #1
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Default Synthetic oil ?

I'm probably going with synthetic oil for my new Crosstrek whats the general consensus on when to switch and which brand is best.
I ran Amsoil in a Hyundai I had and never had any complaints but the local dealer delivered it to my house when I called him letting him know it was time to change my oil. I have since moved and will no longer have that exceptional service provided.

Thanks in advance.

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Old 09-24-2015, 05:21 AM   #2
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Your crosstrek should come from the dealer with synthetic oil. So you shouldn't need to switch.
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Old 09-24-2015, 11:24 PM   #3
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As previously mentioned, the Subaru FB20 in the Crosstrek is primarily designed to run on synthetic engine oil in the SAE viscosity of 0W-20.

Any fully synthetic motor oil meeting the following specs should be used.

API (American Petroleum Institute) classification
SM with the words "ENGERGY CONSERVING" or SN with the words "RESOURCE CONSERVING"

or

ILSAC (International Lubricant Specification Advisory Committee)
GF-4 or GF-5, which can be identified with the ILSAC certification mark (Starburst mark)


meeting the SAE (Society of Automotive Engineers) engine oil viscosity rating of
0W-20 (if vehicle is used in North America of a North American country's specifications)

SAE viscosities 5W-30 and 5W-40 may also be used, meeting the above API or ILSAC specs, but Subaru recommends 0W-20.

The exact wording in my owner's manual is shown below for substitute engine oil.
Quote:
If 0W-20 synthetic oil is not available, 5W-30 or 5W-40 conventional oil may be used if replenishment is needed but should be changed to 0W-20 synthetic oil at the next oil change.

Generally, any synthetic meeting the primary specs should do perfectly fine. I run the Idemitsu-manufactured Subaru Synthetic Motor Oil and my used engine oil analysis results have been fine so far with it.



http://i.imgur.com/Jo4OdZ4.png



You can also get a slightly-cheaper Idemitsu SAE 0W-20 viscosity motor oil without the Subaru branding.

But otherwise, I'm unaware of anything else specific to the topic of an optimal engine oil in the FB20.
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Old 09-25-2015, 05:17 AM   #4
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Thank you for all the info I appreciate it.

My crosstreck is being delivered on Monday
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Old 10-14-2015, 09:01 PM   #5
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Just wanted to point out, my dealership told me that if I used oil below 95% synthetic, it actually voids the 5-year warranty on the power train. Thought I should point that out.
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Old 10-14-2015, 09:53 PM   #6
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That's a good point, hofferd & w/the many sales available @ the auto stores & retail outlets, why choose conventional oil. I'm curious to find oil filters to use that do the same job as the oem brand & cost less ? Any one w/answers ?
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Old 10-14-2015, 11:12 PM   #7
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I would NOT recommend just randomly getting an oil filter.

Subaru's engines are a bit odd in that they require a higher bypass-valve specification due to the high flow oil pumps.

Some of the brands I would recommend include Purolator, Wix, the Subaru OEM oil filters (blue is Honeywell/FRAM, black is Tokyo Roki).
Proof of Subaru's high flow pumps can be found here:
Subaru Oil Pump Specs as Relates to Filter Bypass | Engine Oil Filters | Bob Is The Oil Guy

There is also a super-expensive pink STI Sports Oil Filter that meets the specs, but is prohibitively expensive and usually run by motorsports teams.




Overall, considering the availability and low price, I would recommend the Purolator brand.
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