Recent Topics
Dodge dart running issues after filling up fuel
by ram_man - 01/19/20 12:58 AM
Akebono ProAct brake pads now include hardware
by The Critic - 01/19/20 12:43 AM
16 Audi S3 G13 Coolant - 40,500 miles
by agpatel - 01/19/20 12:43 AM
BMW “G3” Axle Alternatives?
by E365 - 01/19/20 12:20 AM
Scan Tool recommendation
by zmelli - 01/18/20 11:57 PM
Keyless Entry Help Needed
by DeafBrad - 01/18/20 11:55 PM
75/140 owners manual vs 75/90 tag
by BigGee - 01/18/20 11:36 PM
toro super recycler with b&s engine HomeDepot
by passgas55 - 01/18/20 06:43 PM
75w140?
by mpack88 - 01/18/20 06:00 PM
Are all 9012 bulbs HIR2?
by dvancleve - 01/18/20 03:30 PM
Ariens L-3 Synthetic Severe-Duty Gear Lube
by Astro_Guy - 01/18/20 02:04 PM
LSx Crank lock
by P10crew - 01/18/20 02:03 PM
ST9688 gasket
by Farnsworth - 01/18/20 01:26 PM
From my stash
by Fattylocks - 01/18/20 12:48 PM
Toyota to Mexico
by kstanf150 - 01/18/20 12:37 PM
Final Sludge Cleanup, HDEO - Diesel ??
by jssaab - 01/18/20 12:31 PM
A good cabin filter
by NH73 - 01/18/20 10:36 AM
K&N cut open.
by laserred96gt - 01/18/20 10:25 AM
Newest Members
Katdaddy, graphine, Bebo77, 2EHA, jonnyb433
70467 Registered Users
Who's Online Now
36 registered members (aquariuscsm, BlakeB, agpatel, 2013ecof150, 6 invisible), 1,312 guests, and 22 spiders.
Key: Admin, Global Mod, Mod
Forum Statistics
Forums67
Topics300,300
Posts5,172,788
Members70,467
Most Online3,728
Jan 11th, 2020
Donate to BITOG
Print Thread
Hop To
Page 1 of 2 1 2
Can a "High Mileage" oil help reduce blowby? #5029602 03/02/19 08:20 PM
Joined: Jul 2018
Posts: 42
S
slickoil Offline OP
OP Offline
S
Joined: Jul 2018
Posts: 42
Can a "High Mileage" oil help reduce blowby? Vehicle is a 2010 Toyota Prius with ~146K, if that matters.

Re: Can a "High Mileage" oil help reduce blowby? [Re: slickoil] #5029610 03/02/19 08:28 PM
Joined: Aug 2011
Posts: 1,423
K
kstanf150 Offline
Offline
K
Joined: Aug 2011
Posts: 1,423
No

Re: Can a "High Mileage" oil help reduce blowby? [Re: slickoil] #5029623 03/02/19 08:39 PM
Joined: Apr 2004
Posts: 9,427
ekpolk Offline
Global Moderator
Offline
Global Moderator
Joined: Apr 2004
Posts: 9,427
Maybe, and only indirectly, not inherently because they're "high mileage" oils. Many of the HM oils have viscosities toward the higher end of the spec range for a particular grade, compared to their non-HM siblinigs. Vanilla M1 5w-30 is 11.0 cSt whereas the M1-HM flavor of 5w-30 is 12.1 cSt (hot of course). To the extent that the higher vis might reduce blow by, then again, maybe.

All that said, if blow by has become an issue, for whatever reason, your problems are probably greater than that which might be addressed by tinkering with oil selection.

Last edited by ekpolk; 03/02/19 08:40 PM.

18 Prius Two-Eco (L-Ion Batt), Mag Grey, 4000 miles (M1 AFE 0W-20).
07 Avalon XLS, Cassis Pearl, only 70k miles (M1 EP 5w-30).
04 Prius, Black, 200k miles (M1 EP 5w-30). 2006-2019 --RIP 😥
Re: Can a "High Mileage" oil help reduce blowby? [Re: slickoil] #5029639 03/02/19 08:56 PM
Joined: Sep 2005
Posts: 6,841
W
Warstud Offline
Offline
W
Joined: Sep 2005
Posts: 6,841
Not gonna help much but since your in SC you could just go with a thicker oil.

Re: Can a "High Mileage" oil help reduce blowby? [Re: ekpolk] #5029647 03/02/19 09:04 PM
Joined: Aug 2011
Posts: 1,423
K
kstanf150 Offline
Offline
K
Joined: Aug 2011
Posts: 1,423
High mileage oil is nothing more than good marketing

Re: Can a "High Mileage" oil help reduce blowby? [Re: slickoil] #5029673 03/02/19 09:49 PM
Joined: Dec 2004
Posts: 7,419
Q
Quest Offline
Offline
Q
Joined: Dec 2004
Posts: 7,419
what makes you think you have a blowby issue?


"Internet discussion boards act as echo chambers for conspiracy dittoheads" A.Allen
Re: Can a "High Mileage" oil help reduce blowby? [Re: kstanf150] #5029680 03/02/19 10:01 PM
Joined: May 2005
Posts: 5,007
Y
y_p_w Offline
Offline
Y
Joined: May 2005
Posts: 5,007
Originally Posted by kstanf150
High mileage oil is nothing more than good marketing

Darn you to heck MaxLife!!!

Actually I remember when MaxLife and many of the copycat high mileage motor oils came out they didn't have the API EOLCS donut. They might have even fudged a bit where they couldn't meet the standard, but these days they formulate something that does.

Re: Can a "High Mileage" oil help reduce blowby? [Re: slickoil] #5029716 03/02/19 11:17 PM
Joined: Jan 2018
Posts: 1,196
D
das_peikko Offline
Offline
D
Joined: Jan 2018
Posts: 1,196
Blow-by has always been reduced with thick oil. Thick oil is harder to get past the piston rings and into the combustion chamber.

Re: Can a "High Mileage" oil help reduce blowby? [Re: slickoil] #5029808 03/03/19 04:19 AM
Joined: Jul 2005
Posts: 33,831
D
demarpaint Offline
Offline
D
Joined: Jul 2005
Posts: 33,831
Possibly.


God Bless Our Troops

Re: Can a "High Mileage" oil help reduce blowby? [Re: slickoil] #5029978 03/03/19 09:19 AM
Joined: Apr 2018
Posts: 929
J
joekingcorvette Offline
Offline
J
Joined: Apr 2018
Posts: 929
I have had high mileage vehicles but never thought I had the need to a high mileage oil. I doubt if it will help your problem.


2005 Chevrolet Corvette
2014 Ford F-150 4x4 supercrew
2014 Jeep Grand Cherokee Limited (wifes)
2012 Honda Civic 4 door (my daily driver)
2007 Lund Tyee Grand Sport Mercury 115HP 9.8HP
Re: Can a "High Mileage" oil help reduce blowby? [Re: slickoil] #5030020 03/03/19 10:10 AM
Joined: Aug 2010
Posts: 2,097
B
benjy Offline
Offline
B
Joined: Aug 2010
Posts: 2,097
HM oil worked for me! aunts 1999 jeep was leaking quite a bit but after 2 changes, 6 mo intervals its getting better. on a similar note girlfriends DI 2.5 LS malibu cut consumption in half with a euro spec 5-40 compared to a 10-30 + don't even mention the spec 20 than ran thru it when new. all oils fake group III synthetic.

Re: Can a "High Mileage" oil help reduce blowby? [Re: y_p_w] #5030098 03/03/19 11:03 AM
Joined: Jul 2005
Posts: 12,896
dave1251 Offline
Offline
Joined: Jul 2005
Posts: 12,896
Originally Posted by y_p_w
Originally Posted by kstanf150
High mileage oil is nothing more than good marketing

Darn you to heck MaxLife!!!

Actually I remember when MaxLife and many of the copycat high mileage motor oils came out they didn't have the API EOLCS donut. They might have even fudged a bit where they couldn't meet the standard, but these days they formulate something that does.



Yeah most were thicker and had a bit more additives. QS Defy was one who had more ZDDP at API SL levels during the SN era.


make the inside of your engine oil cap white.
don't use.
Re: Can a "High Mileage" oil help reduce blowby? [Re: benjy] #5030103 03/03/19 11:05 AM
Joined: Jul 2005
Posts: 12,896
dave1251 Offline
Offline
Joined: Jul 2005
Posts: 12,896
Originally Posted by benjy
HM oil worked for me! aunts 1999 jeep was leaking quite a bit but after 2 changes, 6 mo intervals its getting better. on a similar note girlfriends DI 2.5 LS malibu cut consumption in half with a euro spec 5-40 compared to a 10-30 + don't even mention the spec 20 than ran thru it when new. all oils fake group III synthetic.



Once again what does it matter about "fake" group III synthetic do you live in the Artic and Pennsylvania is cold it's not the Artic.


make the inside of your engine oil cap white.
don't use.
Re: Can a "High Mileage" oil help reduce blowby? [Re: Quest] #5030295 03/03/19 02:17 PM
Joined: Jul 2018
Posts: 42
S
slickoil Offline OP
OP Offline
S
Joined: Jul 2018
Posts: 42
Originally Posted by Quest
what makes you think you have a blowby issue?


The Toyota Prius is consuming about 1QT of oil every 750miles. This is a known issue with the 2010-2014 Toyota Prius. The fix recommended by Toyota (replacing the piston rings) costs over $1500, so that's not an affordable possibility unless Toyota pays for it (working on getting that to happen).

It hasn't been confirmed to be a blowby issue (not sure how to verify that for sure), but since there is a known issue with the Toyota Prius, and the symptoms match, it's the most likely culprit.

Re: Can a "High Mileage" oil help reduce blowby? [Re: Warstud] #5030311 03/03/19 02:30 PM
Joined: May 2002
Posts: 21,912
P
Patman Offline
Global Moderator
Offline
Global Moderator
P
Joined: May 2002
Posts: 21,912
Originally Posted by Warstud
Not gonna help much but since your in SC you could just go with a thicker oil.



I agree.

I think HM oils are a waste of shelf space. If someone has a higher mileage engine that's burning more oil than they are comfortable with, just move to a thicker viscosity.


2018 Corvette, 17k, M1 ESP Formula 5w30 & NAPA Gold
2006 Civic EX Coupe, 154k, PUP 5w20 & Fram Ultra
2010 BMW 328i X-Drive,125k, GC 0w40 & Fram Ultra

Page 1 of 2 1 2
Previous Thread
Index
Next Thread

BOB IS THE OIL GUY® Powered by UBB.threads™