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#4758235 - 05/15/18 08:43 PM Switch from 0W20 to 5W30 gas mpg change
faltic Offline


Registered: 02/15/14
Posts: 133
Loc: ga
While the Highlander was still on the FF I took it on a road trip round trip about 540 approx round trip got 26.(don't remember) mpg going 25.(don't remember) mpg coming back on flat Florida roads. I replaced the FF with with QSUD 0W20 at 5k miles, no mileage checks during that OCI. Drained the QSUD 0W20 at 10k miles refilled with QSUD 5W30 and went on a road trip. It was 600 approx miles round trip about half thru the Appalachian foot hills. Kind of thought the mileage might drop because of the switch to 5W30 or the climbing hills with CC engaged (saw a few trips to 5k rpm). Only check one fill up which covered the whole trip up and part way back but got 27.48 mpg. I can live with that.
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17 Highlander 3.5 2wd AT 10K+
95 Tacoma 2.4 2wd AT 187k+
07 EX250 21k+
09 EN500 11k+
11 PCX 125 4K+

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#4758246 - 05/15/18 08:49 PM Re: Switch from 0W20 to 5W30 gas mpg change [Re: faltic]
PimTac Online   content


Registered: 03/04/17
Posts: 4929
Loc: Soviet State of Washington
Itís still breaking in. Your fuel economy will improve during this time. I doubt the oil had anything to do with it.
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#4758247 - 05/15/18 08:50 PM Re: Switch from 0W20 to 5W30 gas mpg change [Re: PimTac]
HondaBroMike Offline


Registered: 11/02/17
Posts: 312
Originally Posted By: PimTac
Itís still breaking in. Your fuel economy will improve during this time. I doubt the oil had anything to do with it.


And neither does your Valvoline 0w-20.
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#4758321 - 05/15/18 11:06 PM Re: Switch from 0W20 to 5W30 gas mpg change [Re: faltic]
raytseng Offline


Registered: 12/11/08
Posts: 2397
Loc: CA
one of the biggest factors is still speed or technically wind resistance.
while it may seem the hill climb is going to kill your mpg, if the twists and turns or traffic end up causing you to go 55 or even slower, it may end up equal or better on fuel economy than the 75 or 80mph on the flats.


Edited by raytseng (05/15/18 11:08 PM)

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#4758325 - 05/15/18 11:16 PM Re: Switch from 0W20 to 5W30 gas mpg change [Re: faltic]
Bryanccfshr Offline


Registered: 10/09/04
Posts: 5734
Loc: Texas, Mentone for work, Galve...
The difference between 0w20and 5w30 is insignificant. Keep going. Nice engine in the Highlander. is it like the Australian Kluger with the 2gr fks or is it the 2gr fe?


Edited by Bryanccfshr (05/15/18 11:17 PM)
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#4758328 - 05/15/18 11:22 PM Re: Switch from 0W20 to 5W30 gas mpg change [Re: raytseng]
Bryanccfshr Offline


Registered: 10/09/04
Posts: 5734
Loc: Texas, Mentone for work, Galve...
Originally Posted By: raytseng
one of the biggest factors is still speed or technically wind resistance.
while it may seem the hill climb is going to kill your mpg, if the twists and turns or traffic end up causing you to go 55 or even slower, it may end up equal or better on fuel economy than the 75 or 80mph on the flats.


Yes I can get 25-26 mpg @55 in my taco without a bad headwind. It drops to about 18.5 as I cross 75 mph. Very wind sensitive.
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2018 Trd Pro 4Runner M1 0w40
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#4758369 - 05/16/18 02:26 AM Re: Switch from 0W20 to 5W30 gas mpg change [Re: Bryanccfshr]
faltic Offline


Registered: 02/15/14
Posts: 133
Loc: ga
I believe it's the 2GR FKS

Originally Posted By: Bryanccfshr
The difference between 0w20and 5w30 is insignificant. Keep going. Nice engine in the Highlander. is it like the Australian Kluger with the 2gr fks or is it the 2gr fe?
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17 Highlander 3.5 2wd AT 10K+
95 Tacoma 2.4 2wd AT 187k+
07 EX250 21k+
09 EN500 11k+
11 PCX 125 4K+

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#4758405 - 05/16/18 05:25 AM Re: Switch from 0W20 to 5W30 gas mpg change [Re: Bryanccfshr]
alarmguy Offline


Registered: 07/10/12
Posts: 2237
Loc: South Carolina
Originally Posted By: Bryanccfshr
The difference between 0w20and 5w30 is insignificant. Keep going. Nice engine in the Highlander. is it like the Australian Kluger with the 2gr fks or is it the 2gr fe?


Very true, the OP would not be able to measure any difference in MPG between the two.
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#4758591 - 05/16/18 09:32 AM Re: Switch from 0W20 to 5W30 gas mpg change [Re: faltic]
Hootbro Offline


Registered: 08/25/03
Posts: 2446
Loc: DELAWARE
When collecting data, repeat-ability of conditions is paramount. No engineer would collect data or draw conclusions from what you have done.
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2018 RAM 2500 Cummins 6.7L (Factory Fill 5W-40)
2017 Jeep Renegade 2.4L (Idemitsu 0W-20)


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