Switching from synthetic oil back to reg oil?

hdtwice · Apr 10, 2022

Hello, new here to this forum so let me apologize in advance if this is one of those often asked questions.
2018 hemi 5.7 with 35k... currently syn oil but I would like to switch to conv oil. I have done a google search on this and many say you can switch back with no problem....but!..I would like to know if anyone here has done it and have some time on the engine since switching to let me know what they have experienced ... anyone?
Thanks.

huntergreen · Apr 10, 2022

Of course you can, just not sure why you would want to. If you scroll down to engine and performance, you can ask this in the synthetic oil thread. You’ll get some well informed reply’s there.

skbball06 · Apr 10, 2022

Good to switch will not damage anything but curious as to why? Would it be a better question to ask why is a synthetic blend recommended and widely used?

Old Mopar Guy · Apr 10, 2022

OMG, don't do it!
The oil is the life blood of that engine.

GTyankee · Apr 10, 2022

If your wallet is hurting, you can do it
If you want the most out of your engine, you already know the answer

pacofortacos · Apr 11, 2022

If you are going to change it often there shouldn't be any problem.
I have gone back and forth with blend and synthetic often - maybe even conventional once or twice.
But my oil changes generally are done every trip ( truck is used for trips almost exclusively), so the oil often only has an actual drive time on it of max of 2 weeks. Mileage is usually between 2500-4000 miles between changes.

Socalramfan · Apr 11, 2022

We are all waiting to hear ‘Why’ your even thinking of doing so?

jws123 · Apr 11, 2022

If you want to use cheap oil long term your lifters and cam wont like that to much :laughing1:

Daw14 · Apr 11, 2022

How did the commercial go,pay a little now or a lot later . Why are you wanting to change?

Marmay · Apr 11, 2022

In my case,my 2019 hemi developed a hemi tick around 25 000 km on it,and I was using full synthetic shell rotella oil 5w20,and fram ultra synthetic oil filter,after many different oils&filters,comes out that the only oil ,the tick killer for my Ram is conventional oil 5w20,and mopar oil filter,after 2000km with this oil,the tick dissapeared.

Princeton_Man · Apr 12, 2022

It may all be some sort of coincidence, but before I started using full synthetic oil, no vehicle I ever owned made it to 100k miles before it started using oil, smoking, or had some kind of mechanical problem that could be related to engine wear or oil. My driving habits haven't changed, in fact I'm probably towing more and harder on vehicles today than ever before. Since I switched to full synthetic oil nearly 30 years ago, I've had vehicles go over 275,000 miles without any failures at all. I'm sure some of that is due to better engineering and better quality, but I credit some of that to the synthetic oil.

I started sending oil samples to Blackstone Labs a little over a year ago and I've learned that I can easily go 8000 miles between changes with no significant signs of wear or breakdown of the oil. So while I spend more, I can actually go longer between changes if I want to.

I wouldn't switch back to conventional even if it was provided to me for free.

Jeepwalker · Apr 13, 2022

LOL I once went about 12k miles (maybe even a little more) on my Jetta TDI between changes (shell T6 synth). Honestly, the change slipped my mind and I didn't realize I'd been driving that much. They were all hwy miles, and she's up to ~270k now ...still runs great. I routinely went 10k between changes, but no more. Now, of course I would need about 2 quarts of new oil in between those 10k miles ...so ya have to factor that in.

I've got several vehicles that lived long lives well past 200k on dino oil, but they didn't have the MDS design of the Hemi engine.

stormcom · Apr 21, 2022

In fact if you take it in with oil usage, they will put dino oil in to reseat the rings. I am like anyone else.... Why???

indept · Apr 21, 2022

hdtwice said:
Hello, new here to this forum so let me apologize in advance if this is one of those often asked questions.
2018 hemi 5.7 with 35k... currently syn oil but I would like to switch to conv oil. I have done a google search on this and many say you can switch back with no problem....but!..I would like to know if anyone here has done it and have some time on the engine since switching to let me know what they have experienced ... anyone?
Thanks.

So why do you want to change to Dino oil?

indept · Apr 21, 2022

stormcom said:
In fact if you take it in with oil usage, they will put dino oil in to reseat the rings. I am like anyone else.... Why???

Sounds like an old wives tale to me.

stormcom · Apr 25, 2022

stormcom said:
In fact if you take it in with oil usage, they will put dino oil in to reseat the rings. I am like anyone else.... Why???

Sounds like an old wives tale to me.

It is SOP for Mercedes. They will do a Dino change and have you drive 3500 mi. and go back to synthetic. Don't ask me why but they do it. They told me the rings will reseat better on Dino than synthetic. We have plenty of oil pros on the forum and would like from a technical perspective to see why?

David James · May 16, 2022

hdtwice said:
Hello, new here to this forum so let me apologize in advance if this is one of those often asked questions.
2018 hemi 5.7 with 35k... currently syn oil but I would like to switch to conv oil. I have done a google search on this and many say you can switch back with no problem....but!..I would like to know if anyone here has done it and have some time on the engine since switching to let me know what they have experienced ... anyone?
Thanks.

Truck will never know the difference. It does make a difference as far as extended interval due to additive package and shear strength. If you change it yourself the price diff between conventional and full Syn is negligible.

runamuck · May 24, 2022

one thing about syn oil is supposedly it can tolerate high temps better than dyno. the oil temp my laramie runs well over 200..maybe 220 or so at 52#.

Wild one · May 24, 2022

The OP joined April 10th and hasn't been back since April 13th.

GGlaser · May 24, 2022

I've heard and read that you should absolutely use only the Mopar Oil Filter, but I wonder if that alone would solve the tick issue and that the oil switch was even necessary? I've also read about a lot of owners running 10w30 in their Hemis instead of the 5w20. Not sure if that does damage or hurts anything though?

Switching from synthetic oil back to reg oil?

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