Mazda responds 5w-30

[nickswhip24]

Agreed, it’s not even a suggestion. It’s in black and white that the manufacturer says it’s fine for the application presented. Pick a viscosity applicable for your use case out of your vehicle manual and I don’t foresee issues : )

We’re going to have folks in 10-15 years that are very happy our vehicles didn’t suffer an oil related failure. The two camps for the 2.5 NA will point to either the 0w-20 on the cap or the worldwide 5w-30, and there will be much rejoicing.

Wish I could even track down a reliable source for time 0w, 5w or 10w takes reach to critical engine parts. Did an AI deep dive and it’s attributing oil findings to SAE articles on flame spray characteristics. After fixing prompts to ignore forums and cite only scholarly articles, finally got some real sources but they’re from 1982 and 92 (pre 0w, no VVT, etc). It makes a pretty table but I don’t think it’s worth sharing as I cant get it to cite a source. All I can figure is considering the whole industry went 0w or 5w and we don’t have heaps of vehicles in the junkyard from oil failure, it likely wasn’t a bad move.

good post....i was wondering when vvt became a mainstream feature and how it works with egr cooler...more research needed

 

[Lazy2.5]

Agreed, it’s not even a suggestion. It’s in black and white that the manufacturer says it’s fine for the application presented. Pick a viscosity applicable for your use case out of your vehicle manual and I don’t foresee issues : )

We’re going to have folks in 10-15 years that are very happy our vehicles didn’t suffer an oil related failure. The two camps for the 2.5 NA will point to either the 0w-20 on the cap or the worldwide 5w-30, and there will be much rejoicing.

Wish I could even track down a reliable source for time 0w, 5w or 10w takes reach to critical engine parts. Did an AI deep dive and it’s attributing oil findings to SAE articles on flame spray characteristics. After fixing prompts to ignore forums and cite only scholarly articles, finally got some real sources but they’re from 1982 and 92 (pre 0w, no VVT, etc). It makes a pretty table but I don’t think it’s worth sharing as I cant get it to cite a source. All I can figure is considering the whole industry went 0w or 5w and we don’t have heaps of vehicles in the junkyard from oil failure, it likely wasn’t a bad move.

I think when driven normally, 0w20 should be fine. But, if you're pushing the engine with high loads in hot weather, its not.

Show us the chart, please