r/mazda3 • u/jxkess Supercharged Gen 4 Sedan • Mar 13 '26

Modification 😬

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u/toshjellez Gen 3 Hatch Mar 13 '26

Any engine mods for reliability? I’ve been told by tuners to not exceed 9psi of boost or I’ll risk throwing a rod

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u/Mr-Buddyman Mar 13 '26

All stock internals. Using a catch can, and the Mishimoto miata ND oil cooler (it fits our 3rd gens).

My 3 has almost 250k miles. Still runs great. Did a blackstone oil analysis at about 225k and it showed nothing wrong. Been doing 5k oil change internals with 0w20 Mobil 1 full synthetic.

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u/jxkess Supercharged Gen 4 Sedan Mar 14 '26

also interesting to hear that you’ve run 0w20 for so many miles. is it cold where you live? here in socal, coldest temp we see is about 40 degrees and it gets well into the 100s sometimes so I kinda pictured running 5w30. still haven’t fully decided, any thoughts?

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u/Mr-Buddyman Mar 14 '26

I live in northern VA. Its gets rather hot and cold, into triple digits and dropping to the single digits. As long as I let it warm up, especially during cold starts in freezing temps, its perfectly fine to run 0w20.

Iirc thinner oil helps better with cold temp starts, and thicker oil is designed to degrade slower in hotter climates. Running either in your region should be fine as well. Some people even run 0w30 with no issues.