I need some advice here! Ive been researching this, and I'm seeing a little of everything. Some said its the best thing they've done, others are saying don't do it! Anyways I'm wanting to switch to running a full synthetic 5w30 in my 2019 Laramie 4x4 with the 5.7 hemi MDS/VVT? Your thoughts!
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5W30
- Thread starter BigDog706
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You won't notice any difference. Why the desire to switch?
jamiehughes
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what is the point of doing that? ya know the engineers have done a pretty thorough job of figuring out why to run the advertised oil they recommend in our rides..
You won't have any issues switching to 5w-30. I've been using that for three years in our 2020 Limited. My opinion is that the Hemi was designed to use 5w-30, but Stellantis/Ram switched to 5w-20 and later switched to 0w-20 for slightly better CAFE ratings. Research I've done leans toward 5w-30 helping to prolong engine life, but a bigger factor is to cut the oil change interval down to 5k miles instead of the recommended 10k. I change the oil in our truck once a year, but we drive it less than 5k miles per year. For people who are concerned about warranty issues, they should stick with the recommended viscosity.
Depends where you live. Colder climates 0-20 is fine. Very hot climates where you have constant high temperatures 90-100+ or constantly towing heavy a heavier weight oil may give you better service. Most manufacturers would state that option in the owners manual back in the day.
You can run 20, 30, 40 weight oil in the hemi without any issues. The viscosities are so close it doesn't matter. Good oil easily goes 10k miles now without an issue, if you doubt it or are worried about it get an UOA done to see how much life your oil has left.
The only time you should drop oil weight is if the pressure is always maxed out, this means its hitting the bypass and going back into the pan and or skipping the filter.
The only time you should drop oil weight is if the pressure is always maxed out, this means its hitting the bypass and going back into the pan and or skipping the filter.
Just bad info all around, other than recommending UOA.
stevj
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I've been using 5W-30 (5W-40 for long trips in summer) since my engine's first oil change at 800 miles, with regular oil and filter changes every 4,000-5,000 miles.
Just turned 89,000 miles with zero issues.
Steve
Just turned 89,000 miles with zero issues.
Steve
fishslayer
Active Member
Been using 5W30 Mobil one EP in my last 5 trucks..retired each around 250k..I tow heavy trailers and just dont see 5w20 sufficient. For heavy loads and hivh temps here. Msybe in cold climates..You know Ford and GM havechanged theirs for 0w20 to 0w40 now.
Both Ford and GM changed theirs to cover up poor manufacturing tolerances. Not because it was actually better
