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Use conventional oil, but top off with synthetic? #4525661
09/25/17 10:50 AM
09/25/17 10:50 AM
Joined: Sep 2017
Posts: 2
Southeast
EchoThat300K Offline OP
EchoThat300K  Offline OP
Joined: Sep 2017
Posts: 2
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.

Re: Use conventional oil, but top off with synthetic? [Re: EchoThat300K] #4525663
09/25/17 10:52 AM
09/25/17 10:52 AM
Joined: Aug 2004
Posts: 4,636
Katy, Republic of Texas
blupupher Offline
blupupher  Offline
Joined: Aug 2004
Posts: 4,636
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 VT1100: Peak 15w-40/PSL/2500 mile OCI
2002 Ford F150: GTX HM 5w-20/EcoGard Syn/1yr OCI
2012 Scion xB: QSUD 0w-20/CQ Blue/5k OCI

Re: Use conventional oil, but top off with synthetic? [Re: blupupher] #4525665
09/25/17 10:55 AM
09/25/17 10:55 AM
Joined: Sep 2017
Posts: 2
Southeast
EchoThat300K Offline OP
EchoThat300K  Offline OP
Joined: Sep 2017
Posts: 2
Southeast
Thanks.


Driving, but wish I were on a bicycle.
Re: Use conventional oil, but top off with synthetic? [Re: EchoThat300K] #4525668
09/25/17 10:59 AM
09/25/17 10:59 AM
Joined: Jan 2008
Posts: 10,670
OH
SatinSilver Offline
SatinSilver  Offline
Joined: Jan 2008
Posts: 10,670
OH
What brand filters are you running? Frams are very good fyi.

Last edited by SatinSilver; 09/25/17 11:00 AM.
Re: Use conventional oil, but top off with synthetic? [Re: EchoThat300K] #4525687
09/25/17 11:19 AM
09/25/17 11:19 AM
Joined: Feb 2013
Posts: 10,689
Phoenix, AZ
Nick1994 Offline
Nick1994  Offline
Joined: Feb 2013
Posts: 10,689
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 84k Mobil 1 AFE 0w30 & OEM
2000 Toyota Camry 2.2L 230k Valvoline 5w30 & Fram Ultra
1996 Jeep Cherokee 4.0L 147k Mobil 1 HM 10w40 & Fram Ultra
Re: Use conventional oil, but top off with synthetic? [Re: EchoThat300K] #4525690
09/25/17 11:27 AM
09/25/17 11:27 AM
Joined: May 2009
Posts: 12,192
N.H, U.S.A.
ARCOgraphite Offline
ARCOgraphite  Offline
Joined: May 2009
Posts: 12,192
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
Re: Use conventional oil, but top off with synthetic? [Re: EchoThat300K] #4525693
09/25/17 11:32 AM
09/25/17 11:32 AM
Joined: Jun 2016
Posts: 2,978
MN
oil_film_movies Online content
oil_film_movies  Online Content
Joined: Jun 2016
Posts: 2,978
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.

Re: Use conventional oil, but top off with synthetic? [Re: oil_film_movies] #4525732
09/25/17 12:20 PM
09/25/17 12:20 PM
Joined: Apr 2017
Posts: 945
SF BAY AREA, CA
dogememe Online content
dogememe  Online Content
Joined: Apr 2017
Posts: 945
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 Crown Vic P71 4.6 ~126K Miles, Royal Purple HPS 5W-30, Royal Purple Filter, Daily Driver, 5K OCIs.
2010 Escape FWD 2.5 ~84K Miles, Castrol Edge EP 5W-30, Wix Filter, Rented on Turo, 10-15K OCIs.
Re: Use conventional oil, but top off with synthetic? [Re: EchoThat300K] #4525741
09/25/17 12:31 PM
09/25/17 12:31 PM
Joined: Jul 2017
Posts: 1,292
Douglas County, Colorado
bigj_16 Offline
bigj_16  Offline
Joined: Jul 2017
Posts: 1,292
Douglas County, Colorado
I would use the M1 10W-30 HM, like suggested above. It is relatively inexpensive, and stout oil.

Re: Use conventional oil, but top off with synthetic? [Re: bigj_16] #4525748
09/25/17 12:39 PM
09/25/17 12:39 PM
Joined: Sep 2014
Posts: 1,416
Seattle-ish, WA
Oro_O Offline
Oro_O  Offline
Joined: Sep 2014
Posts: 1,416
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.

Re: Use conventional oil, but top off with synthetic? [Re: Nick1994] #4525851
09/25/17 02:32 PM
09/25/17 02:32 PM
Joined: Dec 2016
Posts: 6,226
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 6,226
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.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Use conventional oil, but top off with synthetic? [Re: EchoThat300K] #4525915
09/25/17 03:32 PM
09/25/17 03:32 PM
Joined: Sep 2016
Posts: 513
Vienna, VA
TinyVoices Offline
TinyVoices  Offline
Joined: Sep 2016
Posts: 513
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 - 160k miles - Valvoline Max Life 5w30
2006 Toyota Matrix XR AWD (Fiancee) - 130k miles - Valvoline Max Life 5w30
Re: Use conventional oil, but top off with synthetic? [Re: EchoThat300K] #4526206
09/25/17 08:59 PM
09/25/17 08:59 PM
Joined: Mar 2016
Posts: 466
burlington ,ontario, canada
ndfergy Offline
ndfergy  Offline
Joined: Mar 2016
Posts: 466
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
Re: Use conventional oil, but top off with synthetic? [Re: EchoThat300K] #4526738
09/26/17 01:21 PM
09/26/17 01:21 PM
Joined: Feb 2003
Posts: 6,003
Cajun Country, La.
BlueOvalFitter Offline
BlueOvalFitter  Offline
Joined: Feb 2003
Posts: 6,003
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

Re: Use conventional oil, but top off with synthetic? [Re: EchoThat300K] #4526783
09/26/17 02:19 PM
09/26/17 02:19 PM
Joined: Oct 2006
Posts: 1,610
SE Pa
cmhj Offline
cmhj  Offline
Joined: Oct 2006
Posts: 1,610
SE Pa
time for another beer run


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