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Any reason to use synthetic if you change your oil every 3-4k in DI engine? #5351792 02/16/20 02:42 PM
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Whammo Offline OP
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My understanding is that synthetics are great for long OCI's but if you run short OCI's there's no need to use them. I have a DI engine that requires oil changes ever 3-4k because of the driving conditions I have. Is there any reason not to use conventional/blend in my situation? In the dead of winter I use synthetic because of the extreme cold but I'm talking about spring/summer/fall now.

Re: Any reason to use synthetic if you change your oil every 3-4k in DI engine? [Re: Whammo] #5351800 02/16/20 02:57 PM
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BAJA_05 Offline
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Just price alone -- Synthetic can be bought cheaper then conventional these days. When is the last time you were at Wal Marts oil/filter section? Super Tech Full Synthetic $14.88 for 5 quarts. What are you paying for conventional 5 quarts these days? Just one point in general. Have a good day.

Dale


2017 VW Jetta SE TSI 1.4L Turbo (hers)
PP Euro 0W40 & FU (42K)
2008 Acura TL 3.2L PPPP 0W20 & FU (114K)
2005 Subaru Baja AWD 2.5L N/A 5spd.
T6 MV 5W30 & FU (103K)
2000 Ram 4X4 5.2L (93K) T6 MV 5W30 & FU
Re: Any reason to use synthetic if you change your oil every 3-4k in DI engine? [Re: BAJA_05] #5351808 02/16/20 03:18 PM
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Whammo Offline OP
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Discounting price, would there be any performance differences at that short of an OCI?

Re: Any reason to use synthetic if you change your oil every 3-4k in DI engine? [Re: Whammo] #5351812 02/16/20 03:24 PM
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hallstevenson Offline
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No and remember, even today, cars that require synthetic are not as common as people seem to think. People think modern Hondas "require" synthetic because they spec 0W-20 and they think that because (old thinking) 0W-20 was only available in full synthetic. Even Honda sells synthetic blend in 0W-20 today. Or one of the Ford specs for engine oil correlates to Motorcraft synthetic blend (in the US) but in Canada, Motorcraft sells conventional oil that meets that same spec.

That said, as noted already, you can get quality synthetic engine oil for $16 for 5 quarts ! Even name-brand engine oils like Castrol are frequently on sale for $22 for 5 quarts.

Re: Any reason to use synthetic if you change your oil every 3-4k in DI engine? [Re: Whammo] #5351814 02/16/20 03:30 PM
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jayjr1105 Offline
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Synthetics beat conventional in more than just longevity. What DI engine doesn't say to use full synthetic in the manual anyway?


2013 Mazda 3 - PP 0w20
2005 Honda Odyssey - PP HM 5w20
Re: Any reason to use synthetic if you change your oil every 3-4k in DI engine? [Re: Whammo] #5351835 02/16/20 03:46 PM
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PimTac Offline
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Just stick with synthetic. The price is equal or not that much more than conventional. For example you can get Havoline Pro DS in the six quart box for less than $20.


2017 Mazda CX5
Valvoline Advanced Synthetic 0w20
Roki OEM filter.
Re: Any reason to use synthetic if you change your oil every 3-4k in DI engine? [Re: jayjr1105] #5351838 02/16/20 03:47 PM
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avi1777 Offline
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I have a cx5 di and the manual gives only specs like sn which can be found in the MC blend for example.
to my understanding full syn is better in all the fields not just longevity,it flows better in the cold,it hold against heat better,it keeps its viscosity better ex.

Re: Any reason to use synthetic if you change your oil every 3-4k in DI engine? [Re: Whammo] #5351846 02/16/20 03:55 PM
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hatt Offline
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I'd use the cheapest thing you can find that meet the specs you need. With rebates syn is going to be cheaper than conventional/blends.


2013 F150 5.0, Delo 400 XSP 5W-40, Wix 57502
2010 Camry 2.5, PP 10W-30, Mobil1 M1C-251A
Re: Any reason to use synthetic if you change your oil every 3-4k in DI engine? [Re: hatt] #5351865 02/16/20 04:11 PM
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csandste Offline
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Originally Posted by hatt
I'd use the cheapest thing you can find that meet the specs you need. With rebates syn is going to be cheaper than conventional/blends.

if you change your own.


2017 Kia Soul+ Valvoline Daily Protection 5w30+ a bit of Harvest King syn 5w30-- 75,000 miles
Re: Any reason to use synthetic if you change your oil every 3-4k in DI engine? [Re: jayjr1105] #5351869 02/16/20 04:15 PM
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Whammo Offline OP
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my Kia manual says nothing about using synthetic in their DI engines.

Re: Any reason to use synthetic if you change your oil every 3-4k in DI engine? [Re: jayjr1105] #5351871 02/16/20 04:17 PM
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hallstevenson Offline
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Originally Posted by jayjr1105
What DI engine doesn't say to use full synthetic in the manual anyway?

Ford recommends owners use an engine oil that meets spec "WSS-blah-blah-blah" for their Fusions. Motorcraft, Ford's own brand of aftermarket parts, sells a fully conventional oil that meets that same spec. The oil life monitor typically runs 8000-10000 miles before it says the oil needs changed. Oh, the horror ! grin

Re: Any reason to use synthetic if you change your oil every 3-4k in DI engine? [Re: Whammo] #5351889 02/16/20 04:40 PM
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2015 F150 2.7
2018 F350 6.2
Re: Any reason to use synthetic if you change your oil every 3-4k in DI engine? [Re: Whammo] #5351906 02/16/20 04:54 PM
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jayjr1105 Offline
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Most if not all DI engines that don't have a turbo will call for 0w20 in the manual. You would have to go out of your way to find a syn blend 0w20 and conventional 0w20 doesn't exist.


2013 Mazda 3 - PP 0w20
2005 Honda Odyssey - PP HM 5w20
Re: Any reason to use synthetic if you change your oil every 3-4k in DI engine? [Re: jayjr1105] #5351928 02/16/20 05:13 PM
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hallstevenson Offline
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Originally Posted by jayjr1105
You would have to go out of your way to find a syn blend 0w20

Walk into a Honda dealer's part department. Walmart sells a Quaker State syn-blend in 0W-20. Reality is, the price points on retail shelves between a conventional 0W-20, blend, and full synthetic would be so tight it just doesn't make sense. Plus, retailers would not give up 3x the shelf space when (1) product will sell well enough and covers all bases (that being the full synthetic).

Re: Any reason to use synthetic if you change your oil every 3-4k in DI engine? [Re: Whammo] #5351934 02/16/20 05:14 PM
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OilUzer Offline
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In some ways synthetic is like an iPhone you don't really need. IPhone 8,9,10,+, etc. but since race car drivers are using it, so should you.

I've had or still have cars over 400K, 370K, 200K+ miles all on dino ...
None of my Owner's manual ever specified synthetic.

If you are not racing or redlining the engine and not doing extended oci, dino will work.
The only reason I use syn in couple of our cars is to extend the oci ... Don't like to change oil when it's raining all the time grin2

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