Do You Love Your Mazda? Ditch That 0W-20 Oil!!!

[yrwei52]

hmm.... interesting new CX-9 4 cylinder turbo uses 5w30 even in Canada, thanks for info, what's up with the Royal Purple 5w30 ?
is it good oil, it's always sold out at my local auto stores..... Mobil 1 is always in stock..... I guess no one likes Mobil 1.......

Yep Mazda specifies 5W-30, not 0W-20, oil for SkyActiv-G 2.5L Turbo used in US/NA 2nd-gen CX-9. The bad thing is Mazda OEM 5W-30 oil is Castrol GTX conventional oil re-pack and got used by many CX-9 owners at Mazda dealers. Some of them could experience oil related problems if they don't change the oil more often.

 

[yrwei52]

I'm getting old and cranky and sticking with with my Mazda 0W-20

Have you done anything to the second occurrence of your oil seepage problem on front timing chain cover? How about your small oil leak between engine and transmission? Honestly I do feel your oil seepage issue may get stopped by using a little thicker 5W-30 oil.

 

[Kedis82ZE8]

No.. I've been procrastinating on that one and need to get it into dealer. It very well could be helped with a little thicker oil. I want to rule out the rear main area leak isn't AT fluid as I don't want to waste my AT fluid if that is the case. I'm gonna schedule an appointment tomorrow for after Labor Day weekend.

 

[GJ-Molestor]

I'm getting old and cranky and sticking with with my Mazda 0W-20

Suit yourself. This is just one of those things where you are only benefitting yourself and your engine by trying 5w30. Id strongly recommend grabbing some AMSoil in that weight next time, and just feel the difference... that stuff is good quality oil.. just not in 0w20 weight.

EDIT...just got done dropping about 8.5 quarts of Amsoil 0W-20 in my GX a few weeks back. Toyota/Lexus allows for 10k mile changes with 0W-20 but if one even drops to 5W-20 they say no more than 5K miles.

That doesnt make any sense. The THICKER oil will be able to provide longer term protection for your engine, not the THINNER stuff. That just sounds like another one of the many dealerships schemes out there to squeeze more money out of the buyers.

Regardless of which oil you are using, you should always change it at around 5-6k unless you are using Motul racing oil which is incredibly resistant to shearing.

Yep Mazda specifies 5W-30, not 0W-20, oil for SkyActiv-G 2.5L Turbo used in US/NA 2nd-gen CX-9. The bad thing is Mazda OEM 5W-30 oil is Castrol GTX conventional oil re-pack and got used by many CX-9 owners at Mazda dealers. Some of them could experience oil related problems if they don't change the oil more often.

Most likely because of the turbo related components like the bearings, etc that need the thicker oil.

Theres nothing wrong with Castrol. I mean, its on the lower end of quality, but better then Mobil 1. As long as you change your oil within 5k or so before it gets dirty youll be perfectly fine. But I agree, extended oil intervals are a terrible idea and not in the interest of the buyer whatsoever. 5k intervals should always be maintained if you care about your motor.

 

[Kedis82ZE8]

I do use Amsoil 5W-30 in my Infiniti... it is recommended weight and right at fill line at 90K miles every time. I dropped factory oil at around 2K miles and have Amsoil ever since on that car.

Toyota went through some big conversion to the 10K mile oil change & 0W-20 in 2011 or so.... probably dealer money $$

This is typical of what Toyota says

https://www.toyotaofgreenville.com/ow-20-oil.htm

 

[GJ-Molestor]

I do use Amsoil 5W-30 in my Infiniti... it is recommended weight and right at fill line at 90K miles every time. I dropped factory oil at around 2K miles and have Amsoil ever since on that car.

Toyota went through some big conversion to the 10K mile oil change & 0W-20 in 2011 or so.... probably dealer money $$

This is typical of what Toyota says

https://www.toyotaofgreenville.com/ow-20-oil.htm

Ah... 2011. Conveniently enough when emission regulations became more strict and BMW dropped their beloved NA 6 cylinders for more efficient turbo 4s.

Long term study.. what a load of s***. Engineers did not spend even 5 minutes researching this oil! It was purely CAFEs decision and the engineers had absolutely nothing to do with it.

Using thinner oil, and doubling oil change intervals... wow. Two wrongs dont make a right.

 

[Kedis82ZE8]

Have you done anything to the second occurrence of your oil seepage problem on front timing chain cover? How about your small oil leak between engine and transmission? Honestly I do feel your oil seepage issue may get stopped by using a little thicker 5W-30 oil.

Just noticed this TSB about my timing chain cover leak

Hoping tech that did repair didn't do this...

 

[banjos-n-beer]

Actually pretty shocked...mo on ba rated 95..peeper 91, lunch 96, another one 95, dinner 100!! Guess i need to seek that out..but mo on tap..#1fan table next to us drinking miller light was almost offensive!! Hope all our Texans are weathering the storm safe and sound...

Peeper is still my favorite. Dinner is great but usually brewery release only, and $96 for a twelve pack. I like Another One better than Lunch these days. MO is usually great.

I think my QX takes 5w-30

 

[banjos-n-beer]

I live 17 miles from their brewery. And work 1 mile away...

 

[GJ-Molestor]

I live 17 miles from their brewery. And work 1 mile away...

That is wonderful. I dont see how this pertains to an active thread with 7000 views on it.

 

[Unobtanium]

Have you done anything to the second occurrence of your oil seepage problem on front timing chain cover? How about your small oil leak between engine and transmission? Honestly I do feel your oil seepage issue may get stopped by using a little thicker 5W-30 oil.

Thinking more and more about it, I am glad I did NOTHING. It's just an artifact in the assembly, and cannot get "worse". It is what it is, and it's not a show-car or a buffet plate, so what's it matter?

 

[Unobtanium]

http://forum.mazda6club.com/3rd-gen/274921-great-oil-debate-0w20-v-5w30-3.html#post3816737

 

[Unobtanium]

This debate is absurd.


-It is proven that oil weight does not influence film-strength.
-It is proven that thicker oil...is thicker.

If the clearances inside the engine were made for 0-20, then 0-20 is sufficient to maintain pressure and will have better flow than heavier oil, reducing hot-spots. It will stress the oil-pump less, as well. IF you track the vehicle (it's a damn family hauler...wtf!?), then yes, you can spike the oil temp and thin the oil below typical operating parameters, and a heavier oil might be required for the optimal flow/clearances.

 

[Unobtanium]

Oh, GJ, this guy says RP makes his engine run smoother.
http://forum.mazda6club.com/3rd-gen/274921-great-oil-debate-0w20-v-5w30-5.html#post4581281

Are you going to call him a liar, or ascribe "placebo effect/false conclusion" much like we are to you?

 

[phunky.buddha]

5w30 is not out of the range of approved oil weights. i'm not sure how you categorize that as BS.

I didn't categorize 5w30 as BS, just all the assumptions and hearsay.

would you mind elaborating what is wrong with the skyactiv motors? they are well engineered and i think the new motors are actually quite great. are you hating on it simply because you dont own one?

Nope. Crap fit well in "SkyCraptiv" so I put it there.

Mazda engineered these motors. ford owns rights to manufacture them. Mazda recommended 5w30 everywhere else in the world, so there is your answer.

Hokay. (deadhorse

 

[TheMAN]

 

[batmancx]

In light of very recent events, I will never ever be putting 0w-20 into my engine again. I don't need the economy and I drive max performance, as well as living in a triple digit climate.
Just some stuff I bought today.

This is good oil. If you could do a quick write-up with any differences in how the engine feels that would be helpful for the sake of some people on here

From what I’ve researched and tested, Motul is by far the strongest oil. It’s one of the few capable of providing a lot of engine protection even past your oil change interval.

I know this is highly unscientific but from my experience,

I find products that are sold out at Wal-mart after weekend driveway mechanics stock up to work on their cars

during the weekend tend to be the best, whether it be engine oils, car waxes/washes.....

I just find it interesting Pennzoil Platinum (actually reasonably priced @ $22.97 for 5 qt. jug) product line is sold out across the board except 0W20....

although no one touched the Pennzoil Gold Blend or the European Pennzoil

Castro and Mobil 1 fully stocked,

before I get flamed, I know this is stupid but thought it was interesting Pennzoil was sold out.... Bob is the oil guy rated Pennzoil very good

 

[Anchorman]

I wouldn’t even hesitate at buying that Mobil 1 0W/20 even if I lived in Arizona. Its got nothing to do with “thickness” its about viscosity which is how it runs down a tilted card at a preset temperature. The oil cannot be compressed so its about how quickly it gets around the engine. Who’s Bob the oil guy when he’s at home? In the UK, there are very few companies that blend oil. Just a few of them blend and package oil for virtually all of the gas companies. They are not geared up for it - their core business is fuel.

 

[batmancx]

I wouldn’t even hesitate at buying that Mobil 1 0W/20 even if I lived in Arizona. Its got nothing to do with “thickness” its about viscosity which is how it runs down a tilted card at a preset temperature. The oil cannot be compressed so its about how quickly it gets around the engine. Who’s Bob the oil guy when he’s at home? In the UK, there are very few companies that blend oil. Just a few of them blend and package oil for virtually all of the gas companies. They are not geared up for it - their core business is fuel.

not saying 0W20 is bad,

just saying it's highly suspicious that North America (USA and Canada) CX-5's are spec'd with 0W20 and everywhere else is 5W30

Mazda trying to squeeze out as much MPG that they possibly can .......
even if it may be bad long term for the engine, as long as they hit CAFE numbers.....

Mazda gets fined for every 0.1 MPG not met which translate to huge costs to Mazda's wallet,
so they squeeze as much as possible even if it means thinner oil......
http://www.autonews.com/article/20160716/OEM11/307189981/industry-blindsided-as-cafe-fines-jump

North America CAFE article: https://www.albertaoilmagazine.com/2015/09/north-americas-new-fuel-economy-standards/

https://bobistheoilguy.com/

https://bobistheoilguy.com/forums/ubbthreads.php/forum_summary

 

[banjos-n-beer]

That is wonderful. I dont see how this pertains to an active thread with 7000 views on it.

The majority of views are rubberneckers enjoying the show. The rest of us are just here for the beer.