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#4525661 - 09/25/17 10:50 AM Use conventional oil, but top off with synthetic?
EchoThat300K Offline


Registered: 09/22/17
Posts: 2
Loc: Southeast
Is there an advantage to using synthetic to top off conventional oil as needed?

My 2002 Echo sedan has 275k suburban miles. I have changed the oil consistently at 5k intervals since I got the car used in 2005 at 61k miles.

I used synthetic exclusively for a long time until I began consuming more of it than I was comfortable with. Currently, I burn about 10 ounces of 5-30 conventional per 1000 miles, which is roughly five weeks of driving.

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#4525663 - 09/25/17 10:52 AM Re: Use conventional oil, but top off with synthetic? [Re: EchoThat300K]
blupupher Offline


Registered: 08/27/04
Posts: 4414
Loc: Katy, Republic of Texas
No advantage, no disadvantage (aside from cost).
Do you just have a bunch of synthetic laying around? Otherwise just use conventional.
_________________________
1994 Honda VT1100C: Peak 15w-40/TG/2500 mile OCI
2002 Ford F150: GTX HM 5w-20/EcoGard Syn/1yr OCI
2012 Scion xB: QSUD 0w-20/CQ Blue/5k OCI


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#4525665 - 09/25/17 10:55 AM Re: Use conventional oil, but top off with synthetic? [Re: blupupher]
EchoThat300K Offline


Registered: 09/22/17
Posts: 2
Loc: Southeast
Thanks.
_________________________
Driving, but wish I were on a bicycle.

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#4525668 - 09/25/17 10:59 AM Re: Use conventional oil, but top off with synthetic? [Re: EchoThat300K]
SatinSilver Offline


Registered: 01/24/08
Posts: 10128
Loc: OH
What brand filters are you running? Frams are very good fyi.


Edited by SatinSilver (09/25/17 11:00 AM)

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#4525687 - 09/25/17 11:19 AM Re: Use conventional oil, but top off with synthetic? [Re: EchoThat300K]
Nick1994 Offline


Registered: 02/19/13
Posts: 10097
Loc: Phoenix, AZ
I'd just use synthetic. Burning some oil means you top it off every once in a while and replenish the additives, which means you can stretch the oil change interval out a little bit.

10 ounces in 1,000 miles isn't anything to worry about, that's about 1 quart in 3,000 miles.
_________________________
2015 Hyundai Sonata 2.4L 79k PU 5w30 & OEM
2000 Toyota Camry 2.2L 228k M1 AFE 0w30 & Wix
1996 Jeep Cherokee 4.0L 146k M1 HM 10w40 & Fram Ultra

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#4525690 - 09/25/17 11:27 AM Re: Use conventional oil, but top off with synthetic? [Re: EchoThat300K]
ARCOgraphite Offline


Registered: 05/17/09
Posts: 11963
Loc: N.H, U.S.A.
I would try rotella T4 triple protect 10w30 in there. The old Triple protect 10w30 used to be THE GO-TO OIL for older engines or stressed engines and ODPE in a 30 grade. Haven't tried the T4 but I would give it a shot.
_________________________
2014 Nissan Rogue S CVT, OC#9 41392mi-QSUD10W30 + M110A CHAMP Filter; 2017 Subaru Crosstrek CVT OC#2 ?? mi-SOA/Idemitsu 0w20 + SOA Filter

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#4525693 - 09/25/17 11:32 AM Re: Use conventional oil, but top off with synthetic? [Re: EchoThat300K]
oil_film_movies Offline


Registered: 06/13/16
Posts: 2548
Loc: MN
To slow oil consumption, use Mobil1 High Mileage 10w30. Its a bit thicker than normal 5w30 or other 10w30 oils. HTHS=3.5 which is high for a 30 weight.
Also, its extra seal conditioners will keep the seals flexible to prevent future leaks.

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#4525732 - 09/25/17 12:20 PM Re: Use conventional oil, but top off with synthetic? [Re: oil_film_movies]
dogememe Offline


Registered: 04/15/17
Posts: 593
Loc: SF BAY AREA, CA
Originally Posted By: oil_film_movies
To slow oil consumption, use Mobil1 High Mileage 10w30. Its a bit thicker than normal 5w30 or other 10w30 oils. HTHS=3.5 which is high for a 30 weight.
Also, its extra seal conditioners will keep the seals flexible to prevent future leaks.


or Valvoline Maxlife...
_________________________
2007 Ford Crown Vic P71 4.6 ~124K Miles, Valvoline SynPower 5W-30, Royal Purple Filter *Daily Driver*
2010 Ford Escape 2.5 ~70K Miles, Valvoline SynPower 5W-30, Wix Filter *Turo Rental Car*

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#4525741 - 09/25/17 12:31 PM Re: Use conventional oil, but top off with synthetic? [Re: EchoThat300K]
bigj_16 Offline


Registered: 07/03/17
Posts: 1267
Loc: Douglas County, Colorado
I would use the M1 10W-30 HM, like suggested above. It is relatively inexpensive, and stout oil.

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#4525748 - 09/25/17 12:39 PM Re: Use conventional oil, but top off with synthetic? [Re: bigj_16]
Oro_O Offline


Registered: 09/20/14
Posts: 1351
Loc: Seattle-ish, WA
Originally Posted By: bigj_16
I would use the M1 10W-30 HM, like suggested above. It is relatively inexpensive, and stout oil.


I get the least oil consumption with this oil of various major brands I have tried (including maxlife products). In the Southeast, it can be year-round for you. It's on rebate now and as mentioned, pretty inexpensive in comparison.

With the small sump size in that, I'd set one of my trip odometers to zero at my oil change, then check the oil every 500 miles and top up, and no less often than that. I have a vehicle with higher consumption than yours(but a larger sump), and I top it up every 400 miles. It helps reduce consumption.

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#4525851 - 09/25/17 02:32 PM Re: Use conventional oil, but top off with synthetic? [Re: Nick1994]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
Originally Posted By: Nick1994

10 ounces in 1,000 miles isn't anything to worry about, that's about 1 quart in 3,000 miles.


Correct. Just add whatever is cheap, it will still replenish additives. Change oil at 15,000.
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(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."

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#4525915 - 09/25/17 03:32 PM Re: Use conventional oil, but top off with synthetic? [Re: EchoThat300K]
TinyVoices Offline


Registered: 09/12/16
Posts: 480
Loc: Vienna, VA
I'd probably use MaxLife red bottle. Great oil and has slowed usage in all the engines I use it in. Plus it's quite cheap.
_________________________
1993 Toyota MR2 Hardtop N/A - 157k miles - Valvoline Max Life 5w30
2006 Toyota Matrix XR AWD (Fiancee) - 126k miles - Valvoline Max Life 5w30

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#4526206 - 09/25/17 08:59 PM Re: Use conventional oil, but top off with synthetic? [Re: EchoThat300K]
ndfergy Offline


Registered: 03/28/16
Posts: 418
Loc: burlington ,ontario, canada
I would try a little thicker 10W30 dino oil first. Failing that, Mobil HM, as others have mentioned, sounds good.
_________________________
2015 Toyota Yaris 5spd Manual
Summer: Mobil Super 1000 10w30
Winter: Mobil Super 1000 5w30
OEM Filter

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#4526738 - 09/26/17 01:21 PM Re: Use conventional oil, but top off with synthetic? [Re: EchoThat300K]
BlueOvalFitter Offline


Registered: 02/28/03
Posts: 6003
Loc: Cajun Country, La.
Originally Posted By: EchoThat300K
Is there an advantage to using synthetic to top off conventional oil as needed?

My 2002 Echo sedan has 275k suburban miles. I have changed the oil consistently at 5k intervals since I got the car used in 2005 at 61k miles.

I used synthetic exclusively for a long time until I began consuming more of it than I was comfortable with. Currently, I burn about 10 ounces of 5-30 conventional per 1000 miles, which is roughly five weeks of driving.



Many years ago I would make my own FrankenBrew oil. I would sometimes mix half and half dino oil with synthetic. I would also mix different weight oils of dino and synthetic. There are quite a few members here that have, and some still are, mixing oils. So, yes, you can top off your dino oil with synthetic oil all day long. smile

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#4526783 - 09/26/17 02:19 PM Re: Use conventional oil, but top off with synthetic? [Re: EchoThat300K]
cmhj Offline


Registered: 10/20/06
Posts: 1609
Loc: SE Pa
time for another beer run
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