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Old 04-03-2011, 09:22 AM   #1
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Default Ideal oil weight for miata?

Hi since I'm new to miatas I have done an oil change yet. What's a good weight to run now that it's gonna be becoming warmer?
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Old 04-03-2011, 09:38 AM   #2
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It probably depends on the health of you engine. My HLAs make lots of noise when at operating temperature. Mine seems to do best with 5w40 or 5w50 (if I can find it).
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Old 04-03-2011, 10:06 AM   #3
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i thought the general consensus was rotella t6 full synthetic was best for normal duty and track day stuff. great performance and low cost.

off topic. a buddy at work was telling me the head in his rendevous needed to be rebuilt. it was making noise. i road in it an said it ws lfters. i asked if it was worse when cold. he said yes. i say, go to walmart get the above mentioned oil. drive for 1k miles change it with same stuff. tell me if it sounds different. 3 days later his wife calls and said it doesnt make noise anymor, even when cold in morning.

cool story bro, i know.

update: It also got rid of the HLA noise in my 1.6
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Old 04-03-2011, 10:07 AM   #4
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mine works best with 10w30. I've tried 5w30 but it's too noisy and burns oil on startup with the forged pistons that i have.
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Old 04-03-2011, 03:45 PM   #5
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I use Mobil1 0W40. So far my engine hasn't blown
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Old 04-03-2011, 06:44 PM   #6
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Another M1 0w40 user here. It's arguably the best oil available under the Mobil1 name.
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Old 04-03-2011, 07:45 PM   #7
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5w-40 rotella syn ftw
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Old 04-03-2011, 08:05 PM   #8
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Dino Rotella for a street car until you determine which mileage gives you enough fuel shear to warrant the oil change and see if it's worth running the synthetic.
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