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Changing from 5W-30 to 0W-40 #4724345
04/12/18 06:47 AM
04/12/18 06:47 AM
Joined: Aug 2010
Posts: 5,648
Champlain/Hudson Valley
Kira Offline OP
Kira  Offline OP
Joined: Aug 2010
Posts: 5,648
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: 1,333
Winchester, Indiana
SubieRubyRoo Offline
SubieRubyRoo  Offline
Joined: May 2012
Posts: 1,333
Winchester, Indiana
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: 30,415
NY
demarpaint Offline
demarpaint  Offline
Joined: Jul 2005
Posts: 30,415
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: 19,888
MA, Mittelfranken.de
Trav Offline
Trav  Offline
Joined: Nov 2006
Posts: 19,888
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: 40,825
'Stralia
Shannow Offline
Shannow  Offline
Joined: Dec 2002
Posts: 40,825
'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: 6,986
Texas
4WD Offline
4WD  Offline
Joined: Sep 2010
Posts: 6,986
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: 5,648
Champlain/Hudson Valley
Kira Offline OP
Kira  Offline OP
Joined: Aug 2010
Posts: 5,648
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: 3,149
USA
Reddy45 Offline
Reddy45  Offline
Joined: Aug 2008
Posts: 3,149
USA
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: 1,731
War Eagle
toneydoc Offline
toneydoc  Offline
Joined: Dec 2011
Posts: 1,731
War Eagle
check your mathematics


1994 Jeep 159k Mobil 5000 5w30
2014 Camry 34k Havoline 5w20
2018 Jeep Cherokee 2k FactFill
2014 HD Ultra 40k Mobil1 15w50
2012 Rav4 37k Pennzoil Platinum 5w20
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: 40,825
'Stralia
Shannow Offline
Shannow  Offline
Joined: Dec 2002
Posts: 40,825
'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: 1,348
America's Dairyland
LotI Offline
LotI  Offline
Joined: Jan 2013
Posts: 1,348
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: 10,430
Indiana
dlundblad Offline
dlundblad  Offline
Joined: Sep 2013
Posts: 10,430
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 200k Castrol Edge 10w40 HM Fram XG16
02 Volvo S60 2.4T 177k M1 0w40 Mahle OX149D
97 Chevy Blazer 4.3 149k Rotella T5 10w30 Supertech ST3980

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: 4,225
New England
Virtus_Probi Offline
Virtus_Probi  Offline
Joined: Jun 2015
Posts: 4,225
New England
Parking brake is on?
;^)
JK, hope nothing is seriously wrong with the vehicle!


2014 Forester XT, 86000 miles
Last Change;
M1 5W30 d1G2
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: 11,816
Idaho
CT8 Offline
CT8  Offline
Joined: Oct 2014
Posts: 11,816
Idaho
I doubt there is a difference between the oils MPG.But then this is BITOG.


"Don't let your preconceived notions get in the way of facts."
Geoff Metcalf
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

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