The g35 coupe holds 5 quarts if oil. I would recomend using 5w-30 mobile 1 extended performance oil.
A g35 coupe and sedan both hold 5 quarts of oil. I would recommend using Mobil 1 5w-30 extended performance. U can find this oil at most auto part stores.
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I just posted a related link to a video on how to change the oil for the first generation G35 (coupe & sedan).
You take off the bottom cover and the filter is staring right at you. All a G35 is, Super Mack-Daddy Maxima/Altima/350z car
5 quarts
5w 30
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Takes 5 quarts.
5 quarts of 5w-30
4.5 quarts with oil/filter change.
Park the vehicle on a level surface. Drain the oil and replace the filter with a new one. Pour in 4.5 quarts of the correct weight oil. Start the engine and let it run for 1 minute. Shut down and wait 30 minutes. Check the oil level and add as necessary to reach the full mark on the dipstick. You now know the capacity.
It means you need to change your oil.