('14-'18) 2015 dealer service engine with synthetic BLEND oil - Subaru Forester Owners Forum
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post #1 of 28 (permalink) Old 04-26-2019, 02:08 PM Thread Starter
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2015 dealer service engine with synthetic BLEND oil

So I foolishly bought the service deal with my car and they had been using 100% synthetic oil as per the work orders/receipts, but last time the dealer serviced engine with synthetic BLEND oil. I checked the manual and it says synthetic, which to me usually means 100% synthetic, not blend. I know 100% synthetic is superior, but is the blend ok? I also feel like I'm getting ripped off.

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post #2 of 28 (permalink) Old 04-26-2019, 02:49 PM
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I wouldn't accept that especially when the owners manual is specific about using full-synthetic except for top off purposes. When you query the dealer, be prepared for the dealer to say it was a paperwork error and the shop actually used full synthetic.

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post #3 of 28 (permalink) Old 04-26-2019, 04:11 PM
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Yup. They are ripping you off.


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post #4 of 28 (permalink) Old 04-26-2019, 04:29 PM
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Nothing wrong with a synthetic blend, if it meets your engine requirements.

We use a Valvoline MaxLife synthetic blend in our '95 Neon Sport. In our Foresters, we use Valvoline SYNPower, full synthetic & it's more expensive.

These are the best prices I could find at the time of purchase:

• Valvoline MaxLife synthetic blend, 5W-30, 5 quarts = $17
• Valvoline SYNPower full synthetic, 5W-30, 5 quarts = $25

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post #5 of 28 (permalink) Old 04-26-2019, 04:50 PM
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Honestly its not a problem. There is no standard for syn or non syn. Consider that 100% synthetic could be Group III, Group IV, or group V. True synthetics are group IV or V. In other counties Group III is not a synthetic. But in the U.S. most 100% syn oils are group III. And there is virtually no difference between Group III syn and Group II+ (non syn)

Readers digest: don't worry about it. But I would insist they use 100% syn none the less.

Be careful what you wish for.
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post #6 of 28 (permalink) Old 04-28-2019, 02:19 AM
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Your not getting what you paid for. Stealers at it again.
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post #7 of 28 (permalink) Old 04-28-2019, 07:52 AM
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I'm thinking your car requires 0w-20 oil like my '16. Not sure whether any 0w-20 is a blend. Probably fine assuming they used 5w-20 or 5w-30. Issue is you probably paid for a full synthetic change and received a less expensive blend oil instead. At the very least, if you can, go to a different dealer or indie garage if you can on the next go round. Best of all, do it yourself next time if at all possible.
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post #8 of 28 (permalink) Old 04-28-2019, 06:52 PM
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I wouldn't worry about the synthetic blend oil. If it really bothers you change the oil at 3000 or 5000 miles and insist they use full synthetic next time.

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post #9 of 28 (permalink) Old 04-28-2019, 08:34 PM
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If the viscosity is correct and the additive package meets Subaru's specifications your are OK. Fully synthetic base stocks are considered better, but it is the viscosity and the API, ACEA, et. specs. that matter. Unlike Subaru, at this time at least, for VW/Audi, BMW and others using only fully synthetic motor oil at the right viscosity range and with the specific approved additive package is very crucial to the health and well being of their motors regardless of what the chattering masses think on most enthusist's forums, for those respective brands, say.

I have been a long time VW/Audi owner and not just any oil will do, Fortunately VW/Audi have approved over 100 brands of motor worldwide that meet their Oil Quality Standards which vary between gasoline and diesel motors and some times the engine range itself. With 10k plus oil changes using only Castrol motor oil that is specifically approved by VW/Audi has never been a problem for me.
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post #10 of 28 (permalink) Old 04-30-2019, 01:51 PM Thread Starter
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Quote:
Originally Posted by ForesterBill View Post
I wouldn't accept that especially when the owners manual is specific about using full-synthetic except for top off purposes. When you query the dealer, be prepared for the dealer to say it was a paperwork error and the shop actually used full synthetic.
Agreed and as you said (and I simultaneously thought lol), they called back and claimed that's just a paperwork oopsy, they have no synthetic blend anywhere in house.

Quote:
Originally Posted by Frank's subie View Post
I'm thinking your car requires 0w-20 oil like my '16. Not sure whether any 0w-20 is a blend. Probably fine assuming they used 5w-20 or 5w-30. Issue is you probably paid for a full synthetic change and received a less expensive blend oil instead.
Yes my 2015 requires 0w-20 synthetic as per manual. When I looked about a year ago, the blends were hard to find at parts shops in our area. Yes, I paid for synthetic.

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Originally Posted by StanF View Post
I wouldn't worry about the synthetic blend oil. If it really bothers you change the oil at 3000 or 5000 miles and insist they use full synthetic next time.
Ya, kinda what I'm doing. I try not to go past 5000 miles per oil change anyways.

Will be using independent shop(s) and/or doing it myself.

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post #11 of 28 (permalink) Old 05-01-2019, 09:09 AM
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Originally Posted by StanF View Post
I wouldn't worry about the synthetic blend oil. If it really bothers you change the oil at 3000 or 5000 miles and insist they use full synthetic next time.

StanF

I WOULD worry about it. 0W-20 synthetic blend has been out for a while. It is *not* specified as acceptable in our engines.

Go get your oil changed again. Somewhere that will use 0W-20 full synthetic, API type "SN".
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post #12 of 28 (permalink) Old 05-01-2019, 12:17 PM
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Originally Posted by Even_Stephen View Post
I WOULD worry about it. 0W-20 synthetic blend has been out for a while. It is *not* specified as acceptable in our engines.

Go get your oil changed again. Somewhere that will use 0W-20 full synthetic, API type "SN".

Immediately stop driving your car, and get it towed to the nearest oil refinery. Have them remove your oil pan to rid it of any traces of the blended oil. Replace it with 150% virgin full synthetic oil installed at exactly 145.6 degrees. Change it every 15 minutes to be on the safe side.

Why do guys get so stupid and anal about oil?
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post #13 of 28 (permalink) Old 05-01-2019, 12:23 PM
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Originally Posted by Robster View Post
Why do guys get so stupid and anal about oil?
For me it is concern about Subaru denying an engine-related warranty claim if specified oil is not used.
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post #14 of 28 (permalink) Old 05-01-2019, 12:26 PM Thread Starter
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And the possibility of engine bearing problems in the first place!
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post #15 of 28 (permalink) Old 05-01-2019, 12:57 PM
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Quote:
Originally Posted by Even_Stephen View Post
I WOULD worry about it. 0W-20 synthetic blend has been out for a while. It is *not* specified as acceptable in our engines.

Go get your oil changed again. Somewhere that will use 0W-20 full synthetic, API type "SN".
Actually, you can use full dino oil as long as it is "SN" or "GF-5" rated. My owners manual states on page 11-13 the following:

NOTE
Synthetic oil of the grade and viscosity noted in chapter 12 is the recommended engine oil for optimum engine performance. Conventional oil may be
used if synthetic oil is unavailable.

I believe the OP stated that the dealer did the oil change with the syn blend oil, so there is no way that Subaru could deny a warranty claim because of the oil that was used.

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