Recent Topics
Buying Auto Parts (Ebay)
by Warstud. 04/25/19 05:39 PM
need brake job but ...
by Bluebonnet. 04/25/19 05:12 PM
UOA on BMW 0w-30 on BMW F10 M5 with S63 TVDI V8
by AirBull. 04/25/19 05:08 PM
What to drink with trail mix?
by das_peikko. 04/25/19 04:55 PM
And This Folks, Is How You Buy Guns
by billt460. 04/25/19 04:43 PM
Tire leak with new wheels. What would YOU do?
by Lolvoguy. 04/25/19 04:20 PM
Red battery light came on, Ford E150.
by laserred96gt. 04/25/19 03:34 PM
2019 NFL Draft
by JustN89. 04/25/19 03:10 PM
Crabgrass!!!!
by gregk24. 04/25/19 03:06 PM
Drain and fill 08 Kia Rio.
by Jetsfan421. 04/25/19 02:59 PM
Cut Open - Mazda OEM @ 7,000kms
by mcwilly. 04/25/19 02:50 PM
Fender bender...headache!
by gregk24. 04/25/19 02:44 PM
Cerwin Vega 10" Subwoofers - $14.37 Each
by Greg L. 04/25/19 01:53 PM
Blain's Farm & Fleet synthetic oil $2.19/qt.
by BrewCityR. 04/25/19 01:24 PM
F1 - 2019 Azerbaijan Grand Prix
by gofast182. 04/25/19 12:00 PM
Installing an additional fuel filter?
by Ed_Flecko. 04/25/19 11:46 AM
Honda self propel only spining left wheel
by Tundragod. 04/25/19 11:38 AM
Cabin Filter Pics (15k miles)
by DoubleWasp. 04/25/19 11:30 AM
LiquiMoly Jectron Fuel Injection Cleaner
by Ddub. 04/25/19 11:12 AM
servicing a 2018 GM 6speed transmission
by gotnogunk. 04/25/19 10:23 AM
Newest Members
Wood9913, Lydia, jdar805866, PreludeDenarius, Ayodejidj
67902 Registered Users
Who's Online Now
105 registered members (ammolab, 53' Stude, Anduril, 28oz, Andygold, 240_Ed, 12 invisible), 2,065 guests, and 22 spiders.
Key: Admin, Global Mod, Mod
Forum Statistics
Forums67
Topics288,046
Posts4,939,831
Members67,902
Most Online2,967
Mar 10th, 2019
Donate to BITOG
Hop To
Page 1 of 3 1 2 3
Changing from 5W-30 to 0W-40 #4724345
04/12/18 06:47 AM
04/12/18 06:47 AM
Joined: Aug 2010
Posts: 6,316
Champlain/Hudson Valley
Kira Offline OP
Kira  Offline OP

Joined: Aug 2010
Posts: 6,316
Champlain/Hudson Valley
REAL BRIEF:
I drive a 2007 Volvo V70 base (non-turbo) 2.4l I-5 auto.
The car calls for 5W-30 with synthetic being preferred to keep the PCV system clean.

I'm running Mobil1 0W-40 at the moment and it appears my mileage is going down a lot.

I tally mileage the "hard way" monthly. I take total gallons and divide by total miles.

A 500 mile trip garnered me a >17 mpg quick calculation. I usually get 26-27 mpg on such trips.

Is it possible for mileage to take such a hit? I'll resurrect this thread at the end of my month. That's 2 weeks from now.

Re: Changing from 5W-30 to 0W-40 [Re: Kira] #4724348
04/12/18 06:50 AM
04/12/18 06:50 AM
Joined: May 2012
Posts: 2,660
The land of USA-made Subies!
SubieRubyRoo Offline
SubieRubyRoo  Offline

Joined: May 2012
Posts: 2,660
The land of USA-made Subies!
No. At max you may see a 1mpg difference, likely even less than that. Even if you used a REALLY thin 5W30, and the thickest 0W40, you're not going to see anywhere near that drop. Something else is wrong if your average does not come back up.

Re: Changing from 5W-30 to 0W-40 [Re: Kira] #4724354
04/12/18 06:53 AM
04/12/18 06:53 AM
Joined: Jul 2005
Posts: 31,922
NY
demarpaint Offline
demarpaint  Offline

Joined: Jul 2005
Posts: 31,922
NY
I doubt it's the oil. Sounds like a mechanical issue. I doubt your tires are that grossly under inflated, even if they were a 10 mpg hit is huge. FI injector problem? Is the oil level rising? Oil stink of gas? I doubt it has to do with seasonal fuel either, not that much of a hit. Have you done a UOA? Odds of the oil being the problem, I'd say about 0%.


God Bless Our Troops

Re: Changing from 5W-30 to 0W-40 [Re: Kira] #4724355
04/12/18 06:56 AM
04/12/18 06:56 AM
Joined: Nov 2006
Posts: 21,591
MA, Mittelfranken.de
Trav Offline
Trav  Offline

Joined: Nov 2006
Posts: 21,591
MA, Mittelfranken.de
If you are loosing 9-10mpg then there is definitely something else going on.


ASE L1, Master. Deutsch Meisterbrief.
Re: Changing from 5W-30 to 0W-40 [Re: Kira] #4724357
04/12/18 06:58 AM
04/12/18 06:58 AM
Joined: Dec 2002
Posts: 42,798
'Stralia
Shannow Offline
Shannow  Offline

Joined: Dec 2002
Posts: 42,798
'Stralia
You are joking, aren't you ?

Been here how long ???

Re: Changing from 5W-30 to 0W-40 [Re: Kira] #4724363
04/12/18 07:04 AM
04/12/18 07:04 AM
Joined: Sep 2010
Posts: 8,495
Texas
4WD Offline
4WD  Offline

Joined: Sep 2010
Posts: 8,495
Texas
I made that switch on two vehicles and nothing to report probably want a mechanic to do some testing

Re: Changing from 5W-30 to 0W-40 [Re: Shannow] #4724366
04/12/18 07:04 AM
04/12/18 07:04 AM
Joined: Aug 2010
Posts: 6,316
Champlain/Hudson Valley
Kira Offline OP
Kira  Offline OP

Joined: Aug 2010
Posts: 6,316
Champlain/Hudson Valley
I just wanted to be brief by presenting my first blip of "data".

Yes, I'm aware that an oil selection couldn't possibly account for that much difference.
I'm praying it's a bad sensor or mechanical problem.

At first blush, the engine seems to like the 0W-40. It's quiet and strong.

Re: Changing from 5W-30 to 0W-40 [Re: Kira] #4724371
04/12/18 07:07 AM
04/12/18 07:07 AM
Joined: Aug 2008
Posts: 3,613
Where the wind comes sweepin'
Reddy45 Offline
Reddy45  Offline

Joined: Aug 2008
Posts: 3,613
Where the wind comes sweepin'
Have you been keeping the lingonberry reservoir topped off? Swedish cars can do this if you don't maintain good lingonberry levels.

Re: Changing from 5W-30 to 0W-40 [Re: Kira] #4724374
04/12/18 07:10 AM
04/12/18 07:10 AM
Joined: Dec 2011
Posts: 1,794
War Eagle
toneydoc Offline
toneydoc  Offline

Joined: Dec 2011
Posts: 1,794
War Eagle
check your mathematics


1994 Jeep 163k Castrol Synblend 10w30
2014 Camry 39k Havoline 5w20
2018 Jeep Cherokee 5k FactFill
2014 HD Ultra 44k Mobil1 15w50
2012 Rav4 40k Mobil 1 0w20
Re: Changing from 5W-30 to 0W-40 [Re: toneydoc] #4724375
04/12/18 07:11 AM
04/12/18 07:11 AM
Joined: Dec 2002
Posts: 42,798
'Stralia
Shannow Offline
Shannow  Offline

Joined: Dec 2002
Posts: 42,798
'Stralia
Originally Posted By: toneydoc
check your mathematics


LOL, a month to get 500 miles ???

Re: Changing from 5W-30 to 0W-40 [Re: Shannow] #4724377
04/12/18 07:12 AM
04/12/18 07:12 AM
Joined: Jan 2013
Posts: 1,525
America's Dairyland
LotI Offline
LotI  Offline

Joined: Jan 2013
Posts: 1,525
America's Dairyland
Originally Posted By: Shannow
Originally Posted By: toneydoc
check your mathematics


LOL, a month to get 500 miles ???

Good public transportation!


03 Honda Interceptor
11 Kawasaki KLR 650
12 Ford E450
17 VW GTI
[IMG]http://badges.fuelly.com/images/sig-us/803455.png[/IMG]
Re: Changing from 5W-30 to 0W-40 [Re: LotI] #4724393
04/12/18 07:31 AM
04/12/18 07:31 AM
Joined: Sep 2013
Posts: 10,990
Indiana
dlundblad Offline
dlundblad  Offline

Joined: Sep 2013
Posts: 10,990
Indiana
Originally Posted By: LotI
Originally Posted By: Shannow
Originally Posted By: toneydoc
check your mathematics


LOL, a month to get 500 miles ???

Good public transportation!


My guess would be poor driving conditions given the distance over the time.

Cold starts, cold operating, allowing to idle until warm, city driving while cold etc. etc.


03 Jeep WJ 4.0 202k Edge 10w40 HM Fram XG16
02 Volvo S60 2.4T 186k M1 0w40 Mahle OX149D
97 Chevy Blazer 4.3 153k Synpower 5w30 Supertech ST3980 (Ecore)

Re: Changing from 5W-30 to 0W-40 [Re: Kira] #4724399
04/12/18 07:38 AM
04/12/18 07:38 AM
Joined: Jun 2015
Posts: 5,041
New England
Virtus_Probi Offline
Virtus_Probi  Offline

Joined: Jun 2015
Posts: 5,041
New England
Parking brake is on?
;^)
JK, hope nothing is seriously wrong with the vehicle!


2014 Forester XT, 100000 miles
Last Change;
M1 10W30 HM SN+
Tokyo Roki 15208AA170 filter
Re: Changing from 5W-30 to 0W-40 [Re: Kira] #4724401
04/12/18 07:41 AM
04/12/18 07:41 AM
Joined: Oct 2014
Posts: 13,587
Canyon County Idaho
CT8 Offline
CT8  Offline

Joined: Oct 2014
Posts: 13,587
Canyon County Idaho
I doubt there is a difference between the oils MPG.But then this is BITOG.


2015 F150 2.7
2018 F350 6.2
Re: Changing from 5W-30 to 0W-40 [Re: Kira] #4724404
04/12/18 07:43 AM
04/12/18 07:43 AM
Joined: Feb 2010
Posts: 58
SW Oklahoma
Dwane17 Offline
Dwane17  Offline

Joined: Feb 2010
Posts: 58
SW Oklahoma

OP stated a 500 mile trip, not 500 miles in a month

Page 1 of 3 1 2 3
Previous Thread
Index
Next Thread

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