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Which oil next? Mazda skyactiv 2.5 #5209763 09/11/19 03:48 AM
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Stickygreen Offline OP
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“19 cx5 awd with 2.5L skyactiv-G and cylinder deactivation. About 3-3.5k miles per month with about 80% of that being pretty mellow rural & freeway driving. Here’s what I’ve run so far:

0-2k miles - factory fill

2k-5k miles - Mazda 0w20 syn (not high moly) - car ran great, good mpg

5k-10k miles - Idemitsu Zepro 0w20 high moly - engine ran noticeably smoother/quieter at idle to the point that I forgot to shut the engine off a couple times in the driveway. Good mpg, perhaps slightly better than previous but could be attributed to engine breaking in

10k-current 12k miles - Castrol Edge 0w20 black bottle - engine runs well and mpg is similar, but idle seems a touch rougher than with the high moly Zepro

So what oil do you guys think I should try next at 15k? I realize that pretty much any d1g2 0w20 should be fine, but that would be too easy and mean that I’d actually have to focus on my work instead of screwing around online. These are the options I’m currently considering:


M1 0w16 for 5k interval - would the thinner oil help mpg? Or stupid bc could potentially hurt warranty. Read this has higher PAO, which can’t be bad

M1 0w20 EP for 7.5k interval - oil change every 6 weeks is getting old, also supposed to be majority pao correct?

Edge titanium gold bottle 0w20 for 7.5k - with the recent talk of titanium and potential for longer OCI, another seemingly good option

Shell gas truck 0w20 for 5k - newer formulation with more moly than most

Idemitsu Zepro 0w20 d1g2 for 5k - a bit pricier than others at $30/jug, but still reasonable unlike Zepro high moly that has jumped to $40/jug. VOA showed high moly numbers and appears to be on the thinner side of 20wt...

QSUD 0w20 for 5k - cheap, seems to be well liked here, has some moly

Motul 8100 eco-lite 0w20 d1g2 for 5k - is this an ester based oil? If so might go this route at the price (about $6.50 per liter)


Okay well I’d better get back to work. Opinions welcome...


‘19 cx5 touring - Edge 0w20
‘16 Ram 2500 ctd- Rotella 5w40
‘14 ctsv wagon - PU 5w30
‘08 Ram 1500 4.7 - M1 0w40
‘84 euro 635csi - RL 10w40
Re: Which oil next? Mazda skyactiv 2.5 [Re: Stickygreen] #5209771 09/11/19 04:41 AM
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dave123 Offline
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M1 regular or EP easy to get been doing it in my Skyactiv for 120K still runs like the day I picked it up new. Currently running HM formulation with ultra filters.

Re: Which oil next? Mazda skyactiv 2.5 [Re: Stickygreen] #5209773 09/11/19 04:49 AM
Joined: Oct 2009
Posts: 5,173
JohnnyJohnson Offline
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Havoline Smart Change


2004 Corolla 136143
Out: EDGE EP 5W-30 Bosch 3311 7156 Miles
In: Havoline Pro DS 10w-30 Purolator PureOne 3-14-19 129693
2006 Duramax 76552
Out: T6 5W-40 M1-303
In: T6 5W-40 XG9100 73705 4-22-18
Re: Which oil next? Mazda skyactiv 2.5 [Re: Stickygreen] #5209784 09/11/19 05:38 AM
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UncleDave Offline
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If you are dumping sumps every 6 week on the low end or 7.5K on the high end - why not try supertech or rural king ?



UD

Last edited by UncleDave; 09/11/19 05:38 AM.

Uncle Dave
Cat 3126/2 MB3500/Titan/RX400H/17 Ridgeline
700HP V10/ 725HP BBC/ Raptor 700/ KFX450/ YZ250/Onan 8K/ Cat3011C
Re: Which oil next? Mazda skyactiv 2.5 [Re: Stickygreen] #5209811 09/11/19 06:21 AM
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diyjake Offline
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I would probably use M1 0w20 EP. I know you mentioned 0w16, whatever you do don't use thinner oil than what the manufacture calls for!

Re: Which oil next? Mazda skyactiv 2.5 [Re: Stickygreen] #5209837 09/11/19 07:02 AM
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Sayjac Offline
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At your current OCI's, of the list I'd go with the least expensive which I'd assume is the QSUD. If willing to go off list as mentioned Havoline ProDS box and SuperTech Synthetic. If not put off by rebates I'd check the promo board occasionally and keep an eye out for an after rebate deal. I got a couple jugs of M1 0w20 here I got for ~$11 each AR.

Re: Which oil next? Mazda skyactiv 2.5 [Re: Stickygreen] #5209839 09/11/19 07:03 AM
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Virtus_Probi Offline
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Why not more high moly Zepro if you liked it that much?
Should help pay for itself if you see better mileage with it.


2014 Forester XT, 105000 miles
Last Change;
PP 5w30 d1G2
Tokyo Roki 15208AA170 filter
Re: Which oil next? Mazda skyactiv 2.5 [Re: Stickygreen] #5209889 09/11/19 08:06 AM
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avi1777 Offline
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what oils are known to have high moly content in a 5w30?
cant get the zepro here.
love moly so much i named my daughter moly after it.
(not really).
tnx.

Re: Which oil next? Mazda skyactiv 2.5 [Re: Stickygreen] #5209895 09/11/19 08:10 AM
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Hoot_r Offline
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I had good results using M1 0w20 AFE in my 2014 Mazda 5 (2.5L, not Skyactiv engine).


2020 Kia Soul LX, 2.0L Atkinson-cycle I-4 (Nu)
QSUD 5W30, OEM Filter
Re: Which oil next? Mazda skyactiv 2.5 [Re: Stickygreen] #5209916 09/11/19 08:34 AM
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ARCOgraphite Offline
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If Zepro ran good continue. Don't mess with success. But how was upper end power?

Motul 8100 can be a good oil. I dont think 8100 is majority ester (more at PAO but that was over a decade ago)

Nothing else comes to mind.

I wouldn't fool with dimestore oils that are not classic definition synthetics.


2019 VW Jetta S 6MT OCI#1 5885mi-Castrol Edge Prof? VW508+VW Service Filter; '17 Subaru Crosstrek CVT OC#7 52665mi-Castrol GTX Magnatec 5W20 + SOA Filter
Re: Which oil next? Mazda skyactiv 2.5 [Re: Stickygreen] #5209936 09/11/19 08:57 AM
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krismoriah72 Offline
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Well if u are a fan of additives and moly.. may as well go with Redline 0w20 577 Moly
https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/4758799/redline-oil-0w20-voa

However i think my choice would be Havoline ProDS 0w20.. since you are interested in MPG..why not cost of oil?

Would be interesting to see if the cheapest oil also gives great mpg.

Re: Which oil next? Mazda skyactiv 2.5 [Re: Stickygreen] #5209958 09/11/19 09:17 AM
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vwmaniaman Offline
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Been running rural king 0-20 in our 2012 Mazda 5. Still runs like the day we got it. 111K now and uses no oil between changes at 5K. A very nice motor.


Don't waste your time on a slipshod repair.
Re: Which oil next? Mazda skyactiv 2.5 [Re: Stickygreen] #5209988 09/11/19 09:58 AM
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PimTac Offline
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Dittos on the Havoline Pro DS. A quality oil at a great price. My SkyActiv runs great on it.


2017 Mazda CX5
Havoline Pro DS 0w20
Roki OEM filter.
Re: Which oil next? Mazda skyactiv 2.5 [Re: Stickygreen] #5210148 09/11/19 01:42 PM
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RayCJ Offline
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Stickygreen,

You are the perfect candidate to test a no-name oil like Milesyn, Prime, Amazon Basic, SuperTech etc and compare it your known results. FWIW, I've been running Milesyn in my '18 Mazda3, 2.5L and it runs great.

BTW: I would not run a 0w16 unless the owner's manual offers that as an option.

Ray

Re: Which oil next? Mazda skyactiv 2.5 [Re: UncleDave] #5210260 09/11/19 03:34 PM
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Stickygreen Offline OP
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Originally Posted by dave123
M1 regular or EP easy to get been doing it in my Skyactiv for 120K still runs like the day I picked it up new. Currently running HM formulation with ultra filters.


True...can’t go wrong with M1. Used the 0w20 age for many miles in my half ton dodge with great results before playing around with a bunch of different oils later on.

Originally Posted by JohnnyJohnson
Havoline Smart Change


Neat setup, but 5qt jugs are perfect for this Mazda

Originally Posted by UncleDave
If you are dumping sumps every 6 week on the low end or 7.5K on the high end - why not try supertech or rural king ?



UD


1. This is my first gdi car and concerned about fuel dilution & deposits

2. The cylinder deactivation is controlled by a variable pressure oil pump that activates/deactivates CD adjusters with oil pressure. For this reason would rather go with more of a name brand premium synthetic that is perhaps more likely to hold grade. More of a peace of mind thing I suppose


‘19 cx5 touring - Edge 0w20
‘16 Ram 2500 ctd- Rotella 5w40
‘14 ctsv wagon - PU 5w30
‘08 Ram 1500 4.7 - M1 0w40
‘84 euro 635csi - RL 10w40
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