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2017 Focus RS - Castrol 0W40 - 4,900 miles #4534161
10/04/17 08:32 PM
10/04/17 08:32 PM
Joined: Jan 2015
Posts: 69
Massachusetts
wi11iam Offline OP
wi11iam  Offline OP

Joined: Jan 2015
Posts: 69
Massachusetts
Latest UOA. Oil filter used was a Ford Motocraft FL910s. This sample saw 2 auto-x days and some very hot summer temps.
Oil replaced with more Castrol Edge 0W40, as it seems to be getting the job done for me, is cheap and easy to find, and is producing good results. I would run a longer OCI but wouldn't want the oil to shear down any further.. Curious to get other opinions as well. Thanks


Re: 2017 Focus RS - Castrol 0W40 - 4,900 miles [Re: wi11iam] #4534237
10/04/17 11:23 PM
10/04/17 11:23 PM
Joined: Apr 2010
Posts: 13,555
Plano, TX
dparm Offline
dparm  Offline

Joined: Apr 2010
Posts: 13,555
Plano, TX
I'm not sure I would run a longer OCI either. You might want to pay for TAN next time, too, if you are concerned about change intervals and the low flashpoint.

What sort of oil life meter does the car have? What oil is it spec'd for?


2017 Chevrolet Corvette Grand Sport
Re: 2017 Focus RS - Castrol 0W40 - 4,900 miles [Re: wi11iam] #4534260
10/05/17 01:53 AM
10/05/17 01:53 AM
Joined: Oct 2010
Posts: 5,473
Florida
Artem Offline
Artem  Offline

Joined: Oct 2010
Posts: 5,473
Florida
It's probably still breaking in / washing out particles, so it's hard to say but based on the fuel content and flashpoint, I'd say you ran it too far. I would have sampled at 3k to see how it's doing... which is what you should do next time.


2014 Mazda 3 Hatch 2.0L & 6spd - Idemitsu 0w20 Synthetic @ $0.75 a quart. (thanks Advance Auto Parts for the awesome deal)
Re: 2017 Focus RS - Castrol 0W40 - 4,900 miles [Re: wi11iam] #4534409
10/05/17 08:56 AM
10/05/17 08:56 AM
Joined: Oct 2005
Posts: 333
Maryland
timeau Offline
timeau  Offline

Joined: Oct 2005
Posts: 333
Maryland
I would ask to rerun test: I don't believe in TBN=7 after almost 5k miles in a turbo engine. Pretty sure that this is a lab error.


-----
2013 Toyota Camry XLE V6
2012 Honda Accord EX-L V6
Re: 2017 Focus RS - Castrol 0W40 - 4,900 miles [Re: wi11iam] #4534441
10/05/17 09:27 AM
10/05/17 09:27 AM
Joined: Jun 2011
Posts: 7,245
Mahzurrah!
KCJeep Offline
KCJeep  Offline

Joined: Jun 2011
Posts: 7,245
Mahzurrah!
I believe the TBN. From all the UOA's I have seen, Edge 0w40 will do 10k standing on it's head in most applications. It is likely a 12 to 15k oil in lot of rides.

But NOT this one with the fuel dilution issue. Blackstone is notorious for under evaluating fuel, so if they say 1.3 it's likely a LOT higher.


2018 VW Passat GT VR6 - 6k - Valvoline MST 5w40 - VW OEM filter
2012 KIA Sedona 96k - PP HM 10w30
2009 Ford Focus 135k - Supertech FS HM 5w30
2004 Jeep Grand Cherokee, gone but not forgotten.
Re: 2017 Focus RS - Castrol 0W40 - 4,900 miles [Re: wi11iam] #4534742
10/05/17 04:23 PM
10/05/17 04:23 PM
Joined: Aug 2017
Posts: 226
Chicago
danielLD Offline
danielLD  Offline

Joined: Aug 2017
Posts: 226
Chicago
360 means you're likely at 5-6%.

I'd put a nicer oil in such a nice car. An off the shelf oil does this [censored] car no justice.

Re: 2017 Focus RS - Castrol 0W40 - 4,900 miles [Re: wi11iam] #4534759
10/05/17 04:43 PM
10/05/17 04:43 PM
Joined: Aug 2017
Posts: 226
Chicago
danielLD Offline
danielLD  Offline

Joined: Aug 2017
Posts: 226
Chicago
Last time I saw 1.3% FD from Blackstone the back to back GC reading was 7.8%. Knowing Blackstone isn't wrong, they just use an outdated test, in the long run this is going to be your engine corroding away.So I did a study with a major GT-R power house. I can't name due to an NDA and they didn't want other tuning houses to see the results.

Anyways, we ran oils on 400WHP, 800WHP, 1600WHP and 2000WHP vehicles. Turbo and N/A. The difference between new oils, one in particular, Amsoil vs. RLI, was 6whp on the 400WHP N/A car. You don't even want to know the differences between valvoline and M1 vs. Amsoil/RLI were let alone on the more powerful turbo cars.

We retested the vehicles once they had put miles on them and the differences between an oil at 5,000 miles with 4% FD and one with 1%FD was over 15hp. Tests were conducted in a climate and humidity controlled environment, so no reproduction issues here.

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