You can use any SAE certified engine oil in your Nissan. The engine oil should be a 10W-30 weight engine oil.
sae 30
SAE 10w30
No, use exactly what Cummins recommends and nothing else.
SAE 10w30 or SAE 30w. I highly recommend you use Synthetic oil in this air cooled engine. Change the oil once a year.
No, you cannot use ordinary car engine oil. Use a JASO MA or MA2 approved oil, or SAE SF or SG graded oil.
SAE 30 weight in the summer or SAE 10w30 if you use the engine in cool temperatures.
SAE 30W in the summer and SAE 10w30 in the winter. I recommend you use 100% synthetic oil in any air cooled engine.
The recommended SAE oil for your car's engine is typically found in the owner's manual or on a sticker under the hood. It is important to use the correct viscosity and type of oil to ensure optimal performance and longevity of your engine.
Transmission oil Motorex, SAE 15W-50
No, you can not use engine oil in place of two cycle oil.
It depends on which engine you have. 4.6L engine: Use SAE 5W-20 engine oil. 4.0L engine: Use SAE 5W-30 engine oil. You can find all of this information in your Owner's Manual. If you don't have one, here is a PDF of the 2004 Explorer Owner Manual.