In your opinion, which one is a better oil? Or are they equal under everyday normal use? In my area, both oils are a bit on the pricey side so it comes down to which is a better performer, has better additives and base stocks. Thanks for the help!
Mobil TDT 5w-40 and Shell Rotella 5w-40
- Thread starter hpracing10
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Mobil, more robust in every mannor
Originally Posted By: hpracing10
In your opinion, which one is a better oil? Or are they equal under everyday normal use? In my area, both oils are a bit on the pricey side so it comes down to which is a better performer, has better additives and base stocks. Thanks for the help!
What engine would they be going in? Stock or modded?
TDT should be $26 to $32 a gallon, RTS should be $20 a gallon. (round numbers)
In your opinion, which one is a better oil? Or are they equal under everyday normal use? In my area, both oils are a bit on the pricey side so it comes down to which is a better performer, has better additives and base stocks. Thanks for the help!
What engine would they be going in? Stock or modded?
TDT should be $26 to $32 a gallon, RTS should be $20 a gallon. (round numbers)
I do not believe T-6 is on the shelves yet?
dnewton3
Staff member
VOAs and PDFs are going to favor the Mobil 1 TDT.
UOAs show that there is little difference, if any at all.
I have ALWAYS seen the RTS for a significantly less price. (About 1/3 less money on average).
Your engine isn't going to know the difference in daily operation. There is pleny of evidence to substantiate that statement, in the UOA section.
There is no "wrong" answer, but there are "better" answers, depending upon your point of view. Do you value higher end base stocks, or your wallet?
UOAs show that there is little difference, if any at all.
I have ALWAYS seen the RTS for a significantly less price. (About 1/3 less money on average).
Your engine isn't going to know the difference in daily operation. There is pleny of evidence to substantiate that statement, in the UOA section.
There is no "wrong" answer, but there are "better" answers, depending upon your point of view. Do you value higher end base stocks, or your wallet?
I will just be running the oil in my stock, daily driver so I am leaning more on the side of RTS because of price since they are both so close to equal.
What benifits does a better add pack have? That is additives as far as like cleaning agents and anti-wear correct?
Thanks for your comments
What benifits does a better add pack have? That is additives as far as like cleaning agents and anti-wear correct?
Thanks for your comments
Around here TDT is $22 gal and RTS $19 gal. I went with the TDT for winter use in my MB 300D.
dnewton3
Staff member
The add packs are reasonably comparable. The RTS has a lot of VIIs to mimic the viscosity of the PAO in TDT.
Being CJ-4 compliant, they both are going to have robust detergent and anti-agglomerate additives in the total package.
Being CJ-4 compliant, they both are going to have robust detergent and anti-agglomerate additives in the total package.
Originally Posted By: dnewton3
The RTS has a lot of VIIs to mimic the viscosity of the PAO in TDT.
That isn't a fact to support a positive recommendation IMHO; the less VIIs the better for a given viscosity index (again, IMHO).
Actually, I suspect the Grp. III hydrocarbons in RTS mimic the high VI PAOs in M1/Delvac products.
Charlie
The RTS has a lot of VIIs to mimic the viscosity of the PAO in TDT.
That isn't a fact to support a positive recommendation IMHO; the less VIIs the better for a given viscosity index (again, IMHO).
Actually, I suspect the Grp. III hydrocarbons in RTS mimic the high VI PAOs in M1/Delvac products.
Charlie
So basically what you guys are getting at, is that RTS is a grp III synthetic where the M1 TDT is a grp VI but the quality of the RTS is so good that the difference in the two is like splitting hairs? I don't understand completely the whole group III and VI thing, but it seems to me that they are so close in quality that the choice should be clear, RTS is cheaper.
Another question regarding these two oils, which one is the "thicker" 5w-40 oil at operating temps? Is there a spec to show that or are they both just equally a 40wt at operating temp?
Again, Thanks for your replies.
Another question regarding these two oils, which one is the "thicker" 5w-40 oil at operating temps? Is there a spec to show that or are they both just equally a 40wt at operating temp?
Again, Thanks for your replies.
It's Grp. IV, not VI.
As far as viscosity at 100 C., TDT is 14.9 cSt. I can't easily find that number for RTS but I'm sure it's close, within 0.5 cSt.
To each their own. I don't mind paying $32.60/gal for 30 qt oil changes, myself.
Charlie
As far as viscosity at 100 C., TDT is 14.9 cSt. I can't easily find that number for RTS but I'm sure it's close, within 0.5 cSt.
To each their own. I don't mind paying $32.60/gal for 30 qt oil changes, myself.
Charlie
The Shell Rotella T6 5w40 is brand new and not enough is known for a good comparison to Mobil 1 TDT.
The Rotella T6 could turn out to be an outstanding oil. But we don't know. Also, the T6 is not available everywhere, and it may cost more than the Rotella T 5w40 still on the shelves in most places.
The Rotella T6 could turn out to be an outstanding oil. But we don't know. Also, the T6 is not available everywhere, and it may cost more than the Rotella T 5w40 still on the shelves in most places.
I'm still waiting for T6 to show up here.
I am running M1 TDT in my 93 MB diesel but am disappointed at the increased oil consumption I am experiencing. I had nearly zero consumption with Delvac 1300 15w40.
I may try Rotella T Syn next and see if consumption decreases. Would it being a Group III make a difference in the consumption? (With the longer molecular chains and all)?
I may try Rotella T Syn next and see if consumption decreases. Would it being a Group III make a difference in the consumption? (With the longer molecular chains and all)?
For sure TDT all the way!!!!!
T6....Ive used both and must say I prefer the T6
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