Change from 0w20 to 5w30

[GaryMX5]

I have a 2018 Mazda 3 that just went off warranty. Car only has 28K miles on it. Most of these have been long road trip miles. I have always used QS 0w20 full syn. since new. My 21 Mazda CX5 turbo and older Nissan PU both use 5w30. I've seen numerous threads discussed here that often suggest using 5w30 in lieu of 0w20. I'm thinking of the change purely from the standpoint of having to only keep one weight of oil on hand (planning on sticking with QS as it has has been my favorite for its Mazda loving moly content). Any good reasons why I should not do this? Thanks

 

[buster]

It's completely fine.

 

[GRUMPYDUDE2]

No worries. You will not be able to tell the diff. in normal use.

 

[Hall]

Mazda owners manual even says:

Recommended Oil
U.S.A., Canada, and Puerto Rico

Use SAE 0W-20 engine oil.

Mazda Genuine Oil is used in your Mazda vehicle. Mazda Genuine 0W-20 Oil is required to achieve optimum fuel economy.

Except U.S.A., Canada, and Puerto Rico

Use SAE 5W-30 engine oil.

 

[barkingspider]

I’ve switch to 5w30 in my daughters Lexus rx350 and my GFs Lexus GX460. Both are running perfectly normal

 

[Jhemiway23]

I use 5w30 in the summer and ow20 in the winter in my 2010 Corolla

 

[JustTrynaHelp]

Absolutely fine to use 5w30; the engine is the same as any other place on the globe.

 

[Oillover]

No worries. You will not be able to tell the diff. in normal use.

No true.
My engine got quieter at startup and idle.
Fuel economy was unchanged (to me).

 

[tiger862]

I have a 2018 Mazda 3 that just went off warranty. Car only has 28K miles on it. Most of these have been long road trip miles. I have always used QS 0w20 full syn. since new. My 21 Mazda CX5 turbo and older Nissan PU both use 5w30. I've seen numerous threads discussed here that often suggest using 5w30 in lieu of 0w20. I'm thinking of the change purely from the standpoint of having to only keep one weight of oil on hand (planning on sticking with QS as it has has been my favorite for its Mazda loving moly content). Any good reasons why I should not do this? Thanks

That's a personal choice that could be OK. The only thing is you got 28k on 0w20 and once you switch and an engine problem pops up rather related to oil or not, your self conscious will blame the 5W30.

 

[Jimmy_Russells]

This question is asked virtually every day

 

[Triple_Se7en]

The best testimonials are those that keep their vehicles from factory new, to old age junkyard.
The wife and I have done that several times.

 

[JohnnyJohnson]

Going to be just fine my CX5 is going on 0W-40 soon as its of warranty.

 

[wpod]

Why is this an issue 20 wt vs 30 wt oil choices?

 

[Invisible]

Any good reasons why I should not do this?

I think we should have a deep philosophical discussion about this.

Not that the other tens of threads discussing the exact same thing matter...

 

[Rogueman2016s]

Go ahead run the 5w30

 

[TurboZedd-R]

you should run a 5w40 just in case. Lord only knows what will happen if you run a 0w20 in a street vehicle.

 

[Jimmy_Russells]

you should run a 5w40 just in case. Lord only knows what will happen if you run a 0w20 in a street vehicle.

Believe it or not, straight to jail.

 

[Rogueman2016s]

I think the op just wants to minimize his oil inventory being his other vehicles take 5w30.

 

[demarpaint]

Wise choice, I would have swapped the 0W20 out too.

 

[TiGeo]

Bonus QS 5W30 is the #1 oil in Rat540s engineering test!