http://www.allpar.com/mopar/47.html

I'm pretty sure a lot of you have seen this article all about the 4.7 on Allpar.com. It states the following... "Pump clearances are designed for the recommended 5W30 oil [this appears to have changed to 5W20, probably with the 2008 model year]."

So there were no major changes that would require a thinner oil in 2008. I assume that 5W20 is suitable for all 4.7 then. So how many of you are running it?

Oh and it also says.... "The engine is designed to operate 150,000 miles (240,000 km) under normal conditions without part replacement other than normal maintenance items." .... I'm at 270K, LOL

 

5w-30 here. There is no way I'm running 5w-20 in it, 2000 4.7.

I'm well over 150k. No problems with the engine, ever.

 

Interesting thread from 2009 ....

https://dodgeforum.com/forum/3rd-gen...5w-20-oil.html

"So, I inquired about it directly to the service manager and was told that Chrysler has recommended 5w-20 in ALL the 4.7s as well as Hemi's, regardless of year, for about 2 years now. He stated that this was done to remedy "sludge" issues that were/are showing up in the 4.7s at an increased rate"

 

LMAO...like that will solve any sludge problems...

 

Why do you want to use 5w-20 Dodgevity? I assume you've been using 5w-30 all along with no problems.

 

That's a fair question Dan. I'm not decided yet, but I get that start up rattle that sounds like a diesel for about six seconds, so I'm thinking about faster oil delivery on startup. I'm not worried about sludge. I drive a good distance for my commute and I keep full synthetic in it.

I just called 3 Dodge dealership here in the Atlanta area, pretending I was going to come in for an oil change. When I asked what oil weight they used, all three service advisers quickly said "5-20". I went further and told them the year of my truck asking if they were sure, and they pretty much all said that's all they use for the 4.7L. So it would seem, 5W20 is truly the recommended oil for the 4.7L and I might be running oil thats too thick... LOL

So here's where I might be taking it too far, but if 5W-20 works, why not 0W-20? I mean it's only 0 weight while cold, right? We might as well discuss it. The forum's been dead lately anyway.

Flame suit on

 

What oil filter are you using? Most likely the oil is draining down into the pan and then refilling the lifters - not something that the 5w-20 would make a big difference with.

An oil filter anti drainback valve should help though.

 

I've used a variety of good filters, all with anti-drainback valve. Right now I have a Puralator Boss on it. With the 4.7, the filter is vertical with the threaded end up, so I doubt it would drain anyway.

I've had quite a few people tell me they have the same start up rattle and I suppose with almost 300K, it's to be expected. I'm just trying to maximize oil flow across the board.

I'll admit, I also obsess over oil a bit. Spend way too much time on bitog. I also keep tabs on a objective blog where oils films are torture tested to the point of scarring metal. The highest scoring oil is currently Mobil 1 F5 0w-40, European car formula. The second highest? Quaker State Ultimate durability 0W-20, full syn. It even beat out the 5W-20 and 30 versions of the same oil. I already run this oil in my Honda.

It's a long read, but interesting if you are so inclined.

https://540ratblog.wordpress.com/201...-test-ranking/

 

Yes, it is mounted threaded end up. I'm assuming the oil comes down from the oil galleries and back out through the pump.

Can't prove it does/doesn't happen.

I really wouldn't worry about 6 seconds. If I did, I'd get a pre-oiler. That's the best solution.

 

I run 5W-30 in everything, including my Ford that calls for 5W-20. No problems so far, and I don't expect any.