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MPG after switched to new Mobil1 FS 0w40 #4444360
06/28/17 08:36 PM
06/28/17 08:36 PM
Joined: Mar 2015
Posts: 7
California
Eugene_Von Offline OP
Eugene_Von  Offline OP
Joined: Mar 2015
Posts: 7
California
anyone feel MPG is better then before? Does FS mean "fuel saving"? Then is a super saving!
I use idemitsu 5w30 before.

Last edited by Eugene_Von; 06/28/17 08:38 PM.
Re: MPG after switched to new Mobil1 FS 0w40 [Re: Eugene_Von] #4444383
06/28/17 09:08 PM
06/28/17 09:08 PM
Joined: Jul 2005
Posts: 31,005
NY
demarpaint Offline
demarpaint  Offline
Joined: Jul 2005
Posts: 31,005
NY
My mpgs are up .3 mpg according to my EVIC. No change to anything other than warmer weather. We've been on summer blend gas for a while now.


God Bless Our Troops

Re: MPG after switched to new Mobil1 FS 0w40 [Re: Eugene_Von] #4444398
06/28/17 09:19 PM
06/28/17 09:19 PM
Joined: Sep 2010
Posts: 7,485
S California
OneEyeJack Offline
OneEyeJack  Offline
Joined: Sep 2010
Posts: 7,485
S California
No 2 loads of gasoline from the tank farm are exactly alike and with changing weather, traffic and our driving making a mileage judgement is not much more than an accurate guess.

Re: MPG after switched to new Mobil1 FS 0w40 [Re: Eugene_Von] #4444406
06/28/17 09:26 PM
06/28/17 09:26 PM
Joined: Jun 2016
Posts: 3,566
MN
oil_film_movies Offline
oil_film_movies  Offline
Joined: Jun 2016
Posts: 3,566
MN
Originally Posted By: Eugene_Von
anyone feel MPG is better then before? Does FS mean "fuel saving"? Then is a super saving!
I use idemitsu 5w30 before.

FS means Full SAPS, I think. (Or Full Synthetic maybe.)
The 0w40 is thicker than your SN GF-5 5w30. Thicker oil creates more engine friction viscous drag.
More drag means you have to burn more gas to turn the engine. Physics is cruel man.

Re: MPG after switched to new Mobil1 FS 0w40 [Re: Eugene_Von] #4444432
06/28/17 10:04 PM
06/28/17 10:04 PM
Joined: Sep 2015
Posts: 3,955
Connecticut
69GTX Offline
69GTX  Offline
Joined: Sep 2015
Posts: 3,955
Connecticut
I switched from M1 5w-30 to the M1 0w-40 old version last year. That's even thicker than the new FS stuff. Can't say I've seen any change in MPG since the switch. From winter to summer up north here, air density varies from 10-14%. That should be a change you should notice with other variables fairly constant.


----------------

2001 Lincoln Cont 4.6L DOHC/ 39K mi / QS HM 5w30 / FUG XG2
1999 Camaro SS M6 /19K /Mobil 1 0w40 /Fram UG /GM MTL-ATF
1969 Ply GTX/RRs
Re: MPG after switched to new Mobil1 FS 0w40 [Re: oil_film_movies] #4444451
06/28/17 10:44 PM
06/28/17 10:44 PM
Joined: Mar 2015
Posts: 7
California
Eugene_Von Offline OP
Eugene_Von  Offline OP
Joined: Mar 2015
Posts: 7
California
fs 0w40 is not that thick

Re: MPG after switched to new Mobil1 FS 0w40 [Re: Eugene_Von] #4444707
06/29/17 08:22 AM
06/29/17 08:22 AM
Joined: Oct 2014
Posts: 12,595
Idaho
CT8 Online content
CT8  Online Content
Joined: Oct 2014
Posts: 12,595
Idaho
3 mpg better and the air pressure on all 4 tires hasn't changed. grin


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