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#4561177 - 11/01/17 12:16 PM Synthetic or Dino HDEO in my 285k car?
Emanuel Offline


Registered: 07/01/17
Posts: 181
Loc: Venezuela, South America
I have a 01 Corolla (with an 7AFE engine not the 1ZZFE) with 285k miles. Itīs burning 1 qt of oil every 1300 miles which is acceptable for me. I can get a Synthetic 5w40 Oil almost at the same price of the Dino HDEO 15w40 oil that Iīm currently using, the HDEO is API SL rated and I can get two main synthetics with the following ratings:

- PDV 5w40: API SM, ACEA A3/B3 04, MB 229.3, VW502/505, BMW Longlife Oil 01
- Venoco 5w40 & 10w30: API SN


My questions are:

Would I see any benefits using the Synthetic 5w40? My coldest starting ambient temp is 68 °F, so the 15w40 isnīt that thick at that temp.
Would the 5w40 increase the oil consumption? My guess is that the 5w40 would have a lower NOACK than the HDEO 15w40, I think the oil burning is being caused by the rings, valve seals are almost new and there arenīt any leaks. I donīt know how NOACK would affect oil consumption in this condition.
Would the 5w40 Synthetic harm my engine for being so thin? My car used Dino 20w50 98% of its life, this will be the first time in something that thin.


Edited by Emanuel (11/01/17 12:18 PM)

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#4561200 - 11/01/17 12:33 PM Re: Synthetic or Dino HDEO in my 285k car? [Re: Emanuel]
StevieC Offline


Registered: 08/21/08
Posts: 17116
Loc: Ontario, Canada
With the amount of oil you're burning synthetic will be expensive. You also have a lot of miles so synthetic could clean some gunk away from the gaskets and cause leaks where there were none before. (Gunk acting like a seal.)

I would run a high milege oil like Valvoline Maxlife in that engine.

68F is nothing for conventional oil.

BTW: Had a great time in Margarita Island back in 1999 when I was there... Before things took a turn. frown


Edited by StevieC (11/01/17 12:35 PM)
_________________________
'15 Dodge Journey - 90,000 KM's - SSO 5w20
'06 Hyundai Santa Fe - 535,000km - SSO 0w30 (R.I.P)

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#4561206 - 11/01/17 12:37 PM Re: Synthetic or Dino HDEO in my 285k car? [Re: StevieC]
Emanuel Offline


Registered: 07/01/17
Posts: 181
Loc: Venezuela, South America
Originally Posted By: StevieC
With the amount of oil you're burning synthetic will be expensive.
Why it will be expensive? Would it increase oil consumption? I can buy the Synthetic at the same price if I find offers.

Originally Posted By: StevieC
You also have a lot of miles so synthetic could clean some gunk away from the gaskets and cause leaks where there were none before. (Gunk acting like a seal.)
Seals are 35k miles old so Iīm not worried about that.

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#4561210 - 11/01/17 12:40 PM Re: Synthetic or Dino HDEO in my 285k car? [Re: Emanuel]
Mr Nice Offline


Registered: 09/12/04
Posts: 20885
Loc: Orlando, FL
HEDO.

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#4561211 - 11/01/17 12:40 PM Re: Synthetic or Dino HDEO in my 285k car? [Re: Emanuel]
StevieC Offline


Registered: 08/21/08
Posts: 17116
Loc: Ontario, Canada
If the seals are new (35K miles) then go for synthetic at the same price as conventional.

Better protection, better cleaning, better flow when cold although it doesn't really get "Cold" there. smile
_________________________
'15 Dodge Journey - 90,000 KM's - SSO 5w20
'06 Hyundai Santa Fe - 535,000km - SSO 0w30 (R.I.P)

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#4561225 - 11/01/17 12:53 PM Re: Synthetic or Dino HDEO in my 285k car? [Re: Mr Nice]
Emanuel Offline


Registered: 07/01/17
Posts: 181
Loc: Venezuela, South America
Originally Posted By: Mr Nice
HEDO.

Why?


Edited by Emanuel (11/01/17 12:54 PM)

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#4561227 - 11/01/17 12:55 PM Re: Synthetic or Dino HDEO in my 285k car? [Re: StevieC]
Emanuel Offline


Registered: 07/01/17
Posts: 181
Loc: Venezuela, South America
Originally Posted By: StevieC
BTW: Had a great time in Margarita Island back in 1999 when I was there... Before things took a turn. frown
LOL, Margarita is great, I went 2 years ago

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#4561266 - 11/01/17 01:38 PM Re: Synthetic or Dino HDEO in my 285k car? [Re: Emanuel]
Audios Offline


Registered: 11/19/11
Posts: 804
Loc: Lyndhurst NJ
Honestly, whatevers a decent name thats on sale Id run in that situation, but a high mileage oil may help slow the consumption down. With the amount youre burning, its constantly getting refreshed, so longer oil change intervals would work too.
_________________________
2002 VW Golf TDI-Mobil 1 5/40 TDT
2005 BMW M3 BMW Twin Power 10/60
1997 John Deere Gator 4x2
2007 Mercedes GL320 CDI Fuchs 5/40 GT Pro XTL

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#4561270 - 11/01/17 01:43 PM Re: Synthetic or Dino HDEO in my 285k car? [Re: Emanuel]
Nick1994 Offline


Registered: 02/19/13
Posts: 9804
Loc: Phoenix, AZ
I'd just use the 5w40 synthetic and keep topping it off. There isn't any magic elixir of an oil that's going to stop oil consumption. I'd also stretch the oil change interval out to at LEAST 10k miles.
_________________________
2015 Hyundai Sonata 2.4L 76k PU 5w30 & OEM
2000 Toyota Camry 2.2L 227k M1 AFE 0w30 & Wix
1996 Jeep Cherokee 4.0L 145k M1 HM 10w40 & Fram Ultra

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#4561275 - 11/01/17 01:56 PM Re: Synthetic or Dino HDEO in my 285k car? [Re: Emanuel]
Kuato Offline


Registered: 10/23/05
Posts: 7094
Loc: Colorado
Least expensive good that oil you can find.
_________________________
Thick vs Thin test: 15k / 43k miles complete

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#4561281 - 11/01/17 02:00 PM Re: Synthetic or Dino HDEO in my 285k car? [Re: Emanuel]
Merkava_4 Offline


Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
Originally Posted By: Emanuel
Would the 5w40 Synthetic harm my engine for being so thin? My car used Dino 20w50 98% of its life, this will be the first time in something that thin.


So, 5W-40 is a thin oil in Venezuela? Interesting.

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#4561335 - 11/01/17 03:25 PM Re: Synthetic or Dino HDEO in my 285k car? [Re: Nick1994]
Emanuel Offline


Registered: 07/01/17
Posts: 181
Loc: Venezuela, South America
Originally Posted By: Nick1994
I'd just use the 5w40 synthetic and keep topping it off. There isn't any magic elixir of an oil that's going to stop oil consumption. I'd also stretch the oil change interval out to at LEAST 10k miles.
Would yo do 10k OCI with high sulphur fuel (600 ppm) and no thermostat? I do 3k OCI for that reasons

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#4561337 - 11/01/17 03:28 PM Re: Synthetic or Dino HDEO in my 285k car? [Re: Merkava_4]
Emanuel Offline


Registered: 07/01/17
Posts: 181
Loc: Venezuela, South America
Originally Posted By: Merkava_4
Originally Posted By: Emanuel
Would the 5w40 Synthetic harm my engine for being so thin? My car used Dino 20w50 98% of its life, this will be the first time in something that thin.


So, 5W-40 is a thin oil in Venezuela? Interesting.
People doesnīt know anything about oil, they think 20w50 reduces wear and I used to think so, but I have learned that thicker oil means less oil flow. Iīm using 15w40 because is readily avaible (because people use it in new engines) and is considerable thinner at cold starts.


Edited by Emanuel (11/01/17 03:28 PM)

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#4561356 - 11/01/17 03:55 PM Re: Synthetic or Dino HDEO in my 285k car? [Re: Emanuel]
kschachn Offline


Registered: 12/26/05
Posts: 9101
Loc: Upper Midwest
Originally Posted By: Emanuel
People doesnīt know anything about oil, they think 20w50 reduces wear and I used to think so, but I have learned that thicker oil means less oil flow. Iīm using 15w40 because is readily avaible (because people use it in new engines) and is considerable thinner at cold starts.

They will all flow the same as long as they can be pumped, and in your climate the cold-weather specification (W) won't make any difference at all. At your ambients the two grades are going to have very similar viscosity.
_________________________
1994 BMW 530i, 224K
1996 Honda Accord, 261K
1999 Toyota Sienna, 389K
2000 Toyota ECHO, 265K

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#4561389 - 11/01/17 04:53 PM Re: Synthetic or Dino HDEO in my 285k car? [Re: kschachn]
Emanuel Offline


Registered: 07/01/17
Posts: 181
Loc: Venezuela, South America
Originally Posted By: kschachn
They will all flow the same as long as they can be pumped

I donīt know if my guess is right, but wouldnīt a more thicker oil increase oil pressure? And extra oil pressure wouldnīt go to the relief valve of the oil pump, reducing oil flow?

Originally Posted By: kschachn
And in your climate the cold-weather specification (W) won't make any difference at all. At your ambients the two grades are going to have very similar viscosity.

According to this image a 15w40 has a 42% lower KV at 20 °C (68°F which my coldest temp). And PDS says that at 40 °C the KV of the 15w40 is 35% lower. That looks noticable for me.

What is funny to me is how USA people thinks that a 20w50 is a thick oil and according to that data in the image the viscosity of an 5w30 at 0°C-32°F is the same that the one from a 20w50 at 20°C-68°F that is our coldest starting temp. BTW is there a way to extrapolate KV of an oil knowing it viscosity at 40°C and 100°C and using the VI?


Edited by Emanuel (11/01/17 04:56 PM)

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