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I change it every 6-7k using full synthetic. Based on the oil analysis i did with the Mobil 1 Blackstone labs the car would be perfectly happy using 6-7k intervals and this was city/traffic driving.. same could go for you. If you feel better changing at 3 that'll be fine but you could save a bit of money and the analysis shows you're safe to do so.
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GTX2867R, moto-tuned , tomei op , motiv fp , Invidia Q300 ti , Rota titan 17x9 +42 , nt555 255/40 , ST coilovers w/cascam , Hotchkis sways
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