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#4438544 - 06/22/17 01:10 PM Using Shell Rotella T4 for flat tappet engines
samert111 Offline


Registered: 06/21/17
Posts: 3
Loc: West Michigan
Newby here and 1st post.

I've been using Shell Rotella T 10w30 in my pre 2000 Cadillac Northstar and 2001 Jeep Wrangler based on info from the Jeep and Cadillac forums on it's higher Zinc (ZDDP) content for these flat tappet engines. Now all I'm seeing the new Rotella T4 available but I can't seem to find out if they have reduced the Zinc content or replaced it with some other anti wear/scuffing additive and just continue to use it going forward. I really don't want to get into additives so I was hoping you all could give me some guidance on this.

Thanks in advance for your help.

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#4438565 - 06/22/17 01:32 PM Re: Using Shell Rotella T4 for flat tappet engines [Re: samert111]
Reddy45 Offline


Registered: 08/15/08
Posts: 2963
Loc: USA
Rotella T4 that is ONLY rated as CK-4 (or even CJ-4 if you find the early bottles) will have ZDDP levels around 1100-1200.

I'm not sure it exists, but if you find a DUAL rated Rotella T4 that is CK-4/SN then it will have reduced ZDDP.

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#4438578 - 06/22/17 01:43 PM Re: Using Shell Rotella T4 for flat tappet engines [Re: samert111]
FordCapriDriver Offline


Registered: 10/22/15
Posts: 2377
Loc: Balearic Islands , Spain
There were people panicking thinking that they would massively cut back the ZDDP in Rotella but it doesn't really seem like they have, that much.
There is a VOA on BITOG of the new CK-4 Rotella T5 10W-30 and it still seems to have an ok amount of zddp?

Although for those 2 cars, you don't really need high ZDDP levels, despite being flat tappet engines, they get by ok on API SN oils, if it were a muscle car with a wild cam then yes, but a Jeep Inline 6 with a very mild cam and low valve spring pressures? don't worry about ZDDP.
_________________________
1975 Ford Capri II Ghia 3000 V6, - Valvoline VR1 20W-50
1988 Ford Escort MkIV 1.6 Xr3i Cabrio, - Shell Rimula R4X 15W-40 HDEO.

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#4438611 - 06/22/17 02:14 PM Re: Using Shell Rotella T4 for flat tappet engines [Re: samert111]
Miller88 Offline


Registered: 04/09/08
Posts: 12701
Loc: Onondaga County
The time to run high zinc oil in a 2001 Jeep wrangler may have been in 2001. I've been around Jeeps forever and I don't think I've ever seen one with a wiped cam lobe. Once the cam is work hardened, zinc does nothing additionally. And Jeep 4.0s don't run high spring pressure anyway.

It's not a 70s smallblock chevy.
_________________________
18 Forester 2.5I 6M
00 Jeep Cherokee
01 Ford F-350 XL 4x4 5M

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#4438660 - 06/22/17 02:51 PM Re: Using Shell Rotella T4 for flat tappet engines [Re: FordCapriDriver]
BrocLuno Offline


Registered: 09/06/15
Posts: 5508
Loc: Kalifornia Kollective
Originally Posted By: FordCapriDriver
There were people panicking thinking that they would massively cut back the ZDDP in Rotella but it doesn't really seem like they have, that much.
There is a VOA on BITOG of the new CK-4 Rotella T5 10W-30 and it still seems to have an ok amount of zddp?

Although for those 2 cars, you don't really need high ZDDP levels, despite being flat tappet engines, they get by ok on API SN oils, if it were a muscle car with a wild cam then yes, but a Jeep Inline 6 with a very mild cam and low valve spring pressures? don't worry about ZDDP.


OEM valve spring pressures will work well with any good high quality oil. Not to worry.

Now if you have a semi-soft Comp Cam from say 5 years ago and some Chinese made lifters with inferior hardening, I'd be all over the ZDDP numbers and prolly run Brad Penn (Penn One) or Joe Gibbs Driven oil, maybe VR-1 Silver bottle. And you'd still loose it in the end ...
_________________________
Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.

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#4438699 - 06/22/17 03:39 PM Re: Using Shell Rotella T4 for flat tappet engines [Re: BrocLuno]
Building3 Offline


Registered: 04/30/17
Posts: 82
Loc: Michigan
As for the Jeep with the 4.0L engine. I have the same engine in my 2003 Jeep Wrangler. While under the warranty I had the dealer change the oil. They used regular Pennzoil 10w-30. After the warranty period, I have been changing my own oil with the Pennzoil Ultra Platinum 10w-30. I have never had an issue with the engine, or much else with the Jeep. Both the regular Pennzoil and the Ultra in those weights pass the Chrysler Material Standard for motor oil so you should not worry about the flat tappets in the Jeep.

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#4438701 - 06/22/17 03:41 PM Re: Using Shell Rotella T4 for flat tappet engines [Re: samert111]
Building3 Offline


Registered: 04/30/17
Posts: 82
Loc: Michigan
If you want to find out the zinc levels in the Rotella, just call the Shell technical hot line. It is on their website. I have found that all of the major oil companies are quite helpful. They staff the hot line with competent people.

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#4438814 - 06/22/17 06:23 PM Re: Using Shell Rotella T4 for flat tappet engines [Re: samert111]
JeepWJ19 Offline


Registered: 09/09/15
Posts: 932
Loc: PENNSYLVANIA
Yeppers wouldn't worry about it. At least in the 4.0.

You're more likely to have the head cracking issue or the Piston skirts breaking in the 2001 4.0. oil is least of the worries
_________________________
2002 Jeep WJ 4.0 | Mobil 1 HM 5w30 |
TG8A | 2.5" lift | 148k miles

Software Engineer :]

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#4438987 - 06/22/17 09:34 PM Re: Using Shell Rotella T4 for flat tappet engines [Re: Reddy45]
samert111 Offline


Registered: 06/21/17
Posts: 3
Loc: West Michigan
Originally Posted By: Reddy45
Rotella T4 that is ONLY rated as CK-4 (or even CJ-4 if you find the early bottles) will have ZDDP levels around 1100-1200.


The gallon bottles I just picked up had API ratings of CJ-4, CI-4 PLUS, CI-4, CH-4/SM so based on the CJ-4 rating it looks like I'm OK.

The Jeep I just picked up in April 2016 and discovered a cracked head which is common in the 2000/2001 years. When I pulled the head is was obvious the engine had been neglected and was sludged up really bad and all the lifter faces were dished so I replaced them all and pulled the oil pan to replace the rear main seal that was leaking and the pan was really sludged up also. I suspect the lifter condition was caused by extended oil change frequencies. I cleaned it out as best as possible and started using the Rotella T and changed it every 1000 miles for a couple times then went to a 3K mile frequency.

The Cadillac is a 98 Seville with only 74K miles I picked up last March with blown head gaskets so I pulled the engine and rebuilt it and replaced the fine thread head bolts with a course thread head stud which is how to fix these engines. 8 of the 32 cam followers had to be replaced due to obvious wear so I did the engine break in with the Rotella along with some Permatex camshaft break in lube.

Thanks for all the replies.

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#4439105 - 06/23/17 01:21 AM Re: Using Shell Rotella T4 for flat tappet engines [Re: samert111]
FordCapriDriver Offline


Registered: 10/22/15
Posts: 2377
Loc: Balearic Islands , Spain
Strangely, the European equivalent of Shell Rotella T4 , which is Shell Rimula R4X , Is still CI-4/SL Rated and has 1250ppm of zddp afaik.
_________________________
1975 Ford Capri II Ghia 3000 V6, - Valvoline VR1 20W-50
1988 Ford Escort MkIV 1.6 Xr3i Cabrio, - Shell Rimula R4X 15W-40 HDEO.

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#4439111 - 06/23/17 01:30 AM Re: Using Shell Rotella T4 for flat tappet engines [Re: FordCapriDriver]
Garak Offline


Registered: 12/05/09
Posts: 24574
Loc: Regina, Saskatchewan, Canada
As an aside, that can be a bit funny, since if it has ACEA 2012 specs, those are built off of CJ-4. wink
_________________________
Plain, simple Garak.

2008 Infiniti G37 - Shell ROTELLA T6 Multi-Vehicle 5w-30, NAPA Gold 7356
1984 F-150 4.9L - Quaker State GB 10w-30, Wix 51515

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#4439352 - 06/23/17 10:52 AM Re: Using Shell Rotella T4 for flat tappet engines [Re: samert111]
ChrisGuerrero Offline


Registered: 01/30/15
Posts: 82
Loc: Houston, TX
Hi @samert111, we can assure you that our new T4 formulation contains the same amount of zinc (around 1200ppm). –The Shell Rotella Team

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#4439374 - 06/23/17 11:21 AM Re: Using Shell Rotella T4 for flat tappet engines [Re: samert111]
BrocLuno Offline


Registered: 09/06/15
Posts: 5508
Loc: Kalifornia Kollective
Cool smile
_________________________
Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.

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#4441944 - 06/26/17 12:40 PM Re: Using Shell Rotella T4 for flat tappet engines [Re: ChrisGuerrero]
samert111 Offline


Registered: 06/21/17
Posts: 3
Loc: West Michigan
Originally Posted By: ChrisGuerrero
Hi @samert111, we can assure you that our new T4 formulation contains the same amount of zinc (around 1200ppm). –The Shell Rotella Team


Thanks Chris.

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#4558888 - 10/29/17 11:42 PM Re: Using Shell Rotella T4 for flat tappet engines [Re: ChrisGuerrero]
ACHiPo Offline


Registered: 09/04/17
Posts: 16
Loc: Bay Area, CA, USA
Originally Posted By: ChrisGuerrero
Hi @samert111, we can assure you that our new T4 formulation contains the same amount of zinc (around 1200ppm). –The Shell Rotella Team

That’s great info. Anything special I need to look for in CA, or will any Rotella T4 I find have ~1200 ppm zinc and ~1000 ppm phosphorous?

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