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I</a> use the Lightweight Shockproof Gear oil in both my cars and love it. Its called lightweight but its actaully heavier than the stock weighted oil. I use a 75W140 weight oil. And I reccomend all 5speed 240SX owners do the same. Stock is a 75w-90 so it dosent hurt to get a 75W140. I would reccomend getting a GL4 Based oil, the shockproof stuff is GL5 and can hurt your syncro's.
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