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Oil types, viscosity and oil pressure


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Recently purchased a used 2014 Journey, I do regular oil changes to my vehicles and it's getting close to doing the first one on this car 3.6 engine.  Just wondering about oil and grades.  The oil cap said 5-20, why so light oil, something to do with efficiency? Maybe?  I'm wondering if any other oil can be used safely. I've used 10-40 in most my cars for many years and it seems to do well. I haven't used much synthetic oil and wonder of it's benefits if any. Also I notice on start up the oil pressure runs up to about 80 psi and at warmed up is about 35 at idle and goes up with the RPM, I assume this is about normal for this engine?

 

Also the engine has a tick, it's worse when cold and doesn't quite go away when warmed up, assuming it's a rocker, I plan to fix that soon.

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pressure is normal, i use the 5-20 mopar approved 6395 grade i use a mopar filter( be sure you get the right filter for your yr there are 2 kinds) i change mine about 6k and i use syn oil i have a 2014 crossroad i dont hear no tick in mine.i have about 91 k on the clock

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Use the oil that the car needs (in your case 6 quarts 5W-20). There is no cost difference for using 20 vs 30... so why risk excessive wear and drive-train-warranty killing oil for ... tradition?
These engines in modern cars are tested, and engineered to run with their specific oils- at high temp and low temps.
If the engine is "Damn cold", (-40F polar vortex) then let it run for a minute or two before auto-crossing it.

The oil pump is driven by the engine. More revs=more pressure.

Lastly, I use Full-Synthetic every time. My 2011 (3.6 v6) takes 5W-30 (surprisingly, different from yours) per the manufactures requirements. 
I see the $10-$20 more per 7000 miles worth it to delay an engine failure till the next owner buys it. I daily drive the aggressive poop out of my family crossover in metro-detroit traffic- so I think the extra 'protection' is needed.

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Thanks for the reply's! I don't know what kind of oil has been used in this car before I bought it. The dealer did a change on it just before I purchased the car and in the past I've usually changed oil about 3-5 K. I guess modern cars are going longer between oil changes.  

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55 minutes ago, Johnny Cache said:

Thanks for the reply's! I don't know what kind of oil has been used in this car before I bought it. The dealer did a change on it just before I purchased the car and in the past I've usually changed oil about 3-5 K. I guess modern cars are going longer between oil changes.  

 

Yep. Per the manual, wait for the oil change indicator to come on but don’t exceed 10,000 miles or 12 months. Ours comes on around 8000 miles. It all depends on your driving style and driving conditions as to when the indicator will come on. 

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