5W-20 instead of 0W-20?

The real question, is the 2GR quieter using 5W-30?

 

I haven’t run 5w-30, but mine is quieter on 10W-40 than 0W-20 and 10W-30. No incessant lifter tapping/collapsing so far on 10W-40.

 

Any MPG hit going to 10W-40?

 

None detected. I’ve only been on it a few thousand miles, I was on 10W-30 from 7K to 65K. At 68K now. Ironically I’m getting better mileage now than I have in a long time, but it isn’t the thicker oil doing that.

 

I think this is all the info I needed to hear lol. Thanks!

 

Never noticed it any quieter on the two that I had using 5w30. Most of the noise is from the injectors and high pressure fuel pump.

 

Used to work in fuels and oils etc etc...

Firstly - When new (up to 50k) I would always stick to the grade on the oil cap.
Secondly - The car companies are obsessed with manipulating MPG figures and 0w20, 0w16 etc does that. There is no secret that these lighter grades give increased mileage but at an ever, ever so slight wear cost.
Third - The new engines require a harder working, higher quality oil, that often leans towards a lower viscosity, for VVT and VVI etc
Fourth - Consider your operating climate / conditions.

The Standard to meet warranty in the Tacoma 2.7 4 is ILSAC GF-6A. As well as Mobil 1 0w20, that is found in the Mobil 1 0w30 Advanced Fuel Economy for example... (why use any other brand - just saying).
ILSAC GF-6A is NOT found in the Mobil 1 0w30 ESP also Mobil 1. High quality oil specifications will cross over between grades.
Also the owners manual uses the wording 'recommends' not 'must do'
In hot environments and high speed and high workload I would recommend going up a viscosity level. 0w30 meets those requirements for warranty and added protection in heat and high workload.
0w30 is generally considered to be used where ambient air temperature is 36c / 97f. So if you live in these climates then why not give yourself the protection ?

In Summary Mobil 1 0w20 and 0w30 Advanced Fuel Economy (Any probably other brands to can research) have the required ILSAC GF-6A which is the only engine oil specification requirement mentioned in the Toyota manual.
Therefore being May in the South, currently using Mobil 1 0w30 AFE in my Tacoma 2.7 , If I lived further North (and in Winter) I would put 0w20 in.

Hope that helps.