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I agree that one should use the thinnest oil possible, but I consider API certified 30 grade oils to be thin. As I’ve pointed out the difference in KV between most API 20 and 30 grades is only a couple cSt at 212F, and we’re not talking about running 15W-50 or BMW 10W-60 in the 5.7L. I use...

Their recommendation that you can use either 5W-20 or 5W-30 is in line with the point I’ve been trying to make concerning the 5.7L, that the clearances are not so tight that a 30 grade can’t be used in it, possible warranty concern aside. The 5W-20 recommendation for the 5.7L is purely based on...

Understand completely. I gotta admit it would be fun to watch them argue that using a 5W-30 that passed all of the testing required to meet MS-6395 including the Las Vegas fleet test and received the certification was responsible for damaging one of their engines.

I'm not trying to convince anyone it's OK to use any oil grade other than the recommended, not required, 5W-20 in their trucks. Member stevj posted some concerns about his oil temp while towing back in January and stated that he uses 5W-30 and 5W-40, the thread was recently resurrected which...

20 grade oils are recommended strictly to help the manufacturer meet the yearly CAFE standards, there’s no other reason because 20 grade oils do not perform “better“ than other grades such as 30 or 40. If that were so then there would be no reason for manufacturers to recommend anything but 0W...

Can one of you guys who believe that the incredibly tight clearances, not tolerances, of the 5.7L precludes the use of any grade thicker than 20 please explain how 5W-20 can squeeze through those teeny, tiny little clearances when it is cold and thick? The target kinematic viscosity for an API...

My comments weren’t directed to you, they were to GKIII, he’s made numerous points in this discussion and others in which he uses inaccurate terminology. I agree with you that 5W-30 is perfectly acceptable in the Hemi, possible warranty issues aside, and have made that point before. The...

You have referred to the engine tolerances numerous times when you should be referring to the engines clearances. Different words, different meanings and they are not interchangeable. Clearance is the space between moving parts, such as in a bearing, and tolerance is the amount of variance...

Let’s clarify a few things. The first number is the winter rating, which is what the “W” stands for, and an oils winter rating is determined by how it performs in two tests. The first is the cold cranking simulator (CCS), which measures the ability of the oil to allow the engine to crank at cold...

There is so much good information available here that can be found with a google search.

Here’s what a quick google search shows: https://www.google.com/search?q=rock+chips+fender+flares+5thgenrams.com&rlz=1C1CHBD_enUS762US762&oq=rock+chips+fender+flares+5thgenrams.com&aqs=chrome..69i57.23146j0j15&sourceid=chrome&ie=UTF-8

Couldn’t stand the white strips in the rear wheel houses so I installed a set of the Rough Country liners. Couldn’t be happier and the truck looks so much better!

Couldn’t stand looking at the white strip in the rear wheel wells any longer so I ordered a set, installed them today. Man, does the truck look better!

This topic was started almost 2.5 years ago and the op hasn’t been back since then. I’m guessing he’s moved on and forgot all about it.

If you find some SN or SN+ oil at an auto parts store it should be fine. SN+ was introduced in 2018 and SN in 2010, but it's hard to imagine an auto parts store or a place like Walmart having oil more than a couple years old in a popular grade like 5W-20. API SN will become obsolete on May 1...

No

Mainly price and availability. Since “conventional” 5W-20 doesn’t exist any longer under the API SP category you’re only choice now is synthetic or synthetic blend, unless you find some old stock SN. The price difference between synthetic and synthetic blend isn’t huge, and with sales, rebates...

YW. The Pennzoil oil finder leaves a lot to be desired.

With the rollout last year of the new API SP service category and ILSAC GF-6 true conventional became a thing of the past, at least in the 5W-20 and 30 grades. Apparently it’s too difficult to build an oil that meets the tougher SP/GF-6 requirements using only Group II or II+ base stocks so they...