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#2245630 - 04/28/11 12:01 AM Rotella T6 5w-40 in a Gas engine
MrMechanic Offline


Registered: 02/27/10
Posts: 6
Loc: Southern NH
i have a 2004 ford explorer 4.0. been looking for a synthetic 5w-40 and saw shell has it at a great price. but it is diesel oil. will this oil harm my vehicle in any way? ex. cats, emissions, plug fouling etc. it is a "SM" rated oil and i use "SM" rated oil so is it safe of not. i know there is a weight difference but thats not my concern.

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#2245635 - 04/28/11 12:06 AM Re: Rotella T6 5w-40 in a Gas engine [Re: MrMechanic]
dubie2003 Offline


Registered: 01/20/11
Posts: 452
Loc: Melbourne, Florida
You are fine. As long as the oil holds the spec that your vehicle requires, you are golden.

The T6 is a commonly used oil by a lot of people in both gas and diesel applications. It is a bargin when you can find it at WM for 19.50.

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#2245640 - 04/28/11 12:10 AM Re: Rotella T6 5w-40 in a Gas engine [Re: MrMechanic]
MrMechanic Offline


Registered: 02/27/10
Posts: 6
Loc: Southern NH
reason i am asking is because i emailed shell techs and they said it could harm my cats because of the extra additives that diesels require

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#2245641 - 04/28/11 12:14 AM Re: Rotella T6 5w-40 in a Gas engine [Re: MrMechanic]
FusilliJerry82 Offline


Registered: 06/03/06
Posts: 778
Loc: Richboro, PA
As long as you're not burning much oil you're fine. Even then I'm skeptical about ZDDP poisoning the cat.
_________________________
2000 Protege 1.6 215k - Mopar Max Pro 10w-30/Mopar Oil Filter

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#2245643 - 04/28/11 12:14 AM Re: Rotella T6 5w-40 in a Gas engine [Re: MrMechanic]
MrMechanic Offline


Registered: 02/27/10
Posts: 6
Loc: Southern NH
if i understand the api rating thing. i would think in order for it to meet a api rating"SM" the product shouldnt exceed the levels of additives that rating requires, correct? it has to fit within certain tolerances.

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#2245644 - 04/28/11 12:16 AM Re: Rotella T6 5w-40 in a Gas engine [Re: MrMechanic]
MrMechanic Offline


Registered: 02/27/10
Posts: 6
Loc: Southern NH
my truck with 114,000 doesnt burn any oil at all. im currently using pennzoil ultra. wanted to try some thing a little heavier. heard alot of people say the engines run very smooth after using T6

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#2245659 - 04/28/11 12:40 AM Re: Rotella T6 5w-40 in a Gas engine [Re: MrMechanic]
Xstang Offline


Registered: 04/13/11
Posts: 244
Loc: Kansas
Rotella T6 is API-SM rated, which means it's fine for use in gas engines.

The amount of ZDDP in T6 is a lot less than it used to be; it's still in there though-about 1200ppm. Compared to an old box of [censored] n span, that's not much, but still more than the 300ppm of some newer oils.

If you're worried about it, there's always motorcraft syn blend, and it's probably cheaper. Another decent 40 grade would be Mobil 1 0w-40.
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#2245724 - 04/28/11 06:10 AM Re: Rotella T6 5w-40 in a Gas engine [Re: MrMechanic]
jorton Offline


Registered: 07/04/03
Posts: 2654
Loc: San Antonio, TX
Try this: vehicle complaints Shell Rotella. Search
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#2245756 - 04/28/11 07:45 AM Re: Rotella T6 5w-40 in a Gas engine [Re: MrMechanic]
jstutz Offline


Registered: 10/06/08
Posts: 1472
Loc: NC
I know three people that have used 15w40 in there ford 4.0s exclusively and the lowest mileage one is at 125k and the highest mileage one is over 200k miles. our weather is mild here in nc but we do get days when it is 15 deg F. I also know many that have used HDEO in chevy 350s and even small over head cam engines in PA year around. I dont know one that had oil related issues or cat problems. My old pickup has run on old CI rated HDEO at least 75 percent of its life and still runs fine after 229k miles. It has had leaky valve seals since about 100k miles and always blew a litte puff of smoke upon startup. The cat is still fine. Maybe some cars are very sensitive to this kind of thing but most are not. Im not saying 15w40 is the best or anything but if you wanted to run a 5w40 CJ oil, it will not hurt your truck at all. For your winter temps i would suggest something a little lighter in the winter but you will be fine either way. Remember oil choices are based largely upon your driving habits. If you take your vehicle in NH and start it up and drive ten mins thru town and shut it off, then a lighter oil would be more advantageous for you. If you take that same truck and start it up and run 30 miles before shutting it off, tow with it, and generally run it hard, then the 5w40 may be the better oil for you. They will both make your engine most likely out last your truck but you can choose your oil to best fit your situation. One final note, im not a ford expert or anything but i thought i remember some of the ford engines have a very high oil pressure that was more sensitive to the heavier oils. Still a 5w40 in the summer will be fine, it just may not be optimum.

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#2245767 - 04/28/11 08:05 AM Re: Rotella T6 5w-40 in a Gas engine [Re: MrMechanic]
A_Harman Offline


Registered: 10/01/10
Posts: 3660
Loc: Michigan
I think you should stay with an oil that is primarily formulated for gasoline engines. Rotella is rated CJ4/SM, which means it is primarily a diesel oil that can also be used in a gasoline engine. Shell markets it primarily as a heavy-duty diesel oil and says it is good for mixed fleet applications. Rotella's additive package contains a lot of magnesium-based detergents which are typically not recommended for gasoline engines.

Why do you want to go to a 5w40 oil? I think that a 5w30 synthetic would be more applicable to your engine.
_________________________
1985 Z51 Corvette track car
2002 Camaro Z28 LS1/6-speed
2001 Dodge Ram 2500 diesel
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#2245777 - 04/28/11 08:21 AM Re: Rotella T6 5w-40 in a Gas engine [Re: MrMechanic]
renegade_987 Offline


Registered: 04/07/11
Posts: 1447
Loc: Ankeny, IA
I have been wondering the same think for my F-150, as long as it's API-SM certified I guess it would be ok. I may try it as well, good price.
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#2245875 - 04/28/11 10:07 AM Re: Rotella T6 5w-40 in a Gas engine [Re: MrMechanic]
bepperb Offline


Registered: 01/10/08
Posts: 4541
Loc: Milwaukee, WI
An 04 vehicle is made for API SL spec which would have had the same amount of ZDDP as Rotella does currently. It wasn't until SM was released in late 2004 that it was reduced (and even then only for energy conserving grades).

Really, it would probably be a great summer oil. Not sure I'd want a 40 weight in the winter in NH.


Edited by bepperb (04/28/11 10:08 AM)
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#2245893 - 04/28/11 10:32 AM Re: Rotella T6 5w-40 in a Gas engine [Re: MrMechanic]
weebl Offline


Registered: 01/15/06
Posts: 488
Loc: Canada
I have a jug of that stuff left over from when I had a VW TDI. Great oil for my '03 ALH. I've often wondered if it would be okay in the summer in my Toyota's 3MZ-FE, or if I should just give it to my F-I-L who now has an older Dodge Ram with a Cummins he bought off his dad.

I agree, a great oil in a diesel application, but I wonder how suitable it is in a gasoline application.
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2006 Toyota Sienna - 3.3L 3MZ-FE
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#2245896 - 04/28/11 10:35 AM Re: Rotella T6 5w-40 in a Gas engine [Re: A_Harman]
Quattro Pete Offline


Registered: 10/30/02
Posts: 23565
Loc: Illinoistan
Originally Posted By: A_Harman
I think you should stay with an oil that is primarily formulated for gasoline engines. Rotella is rated CJ4/SM, which means it is primarily a diesel oil that can also be used in a gasoline engine. Shell markets it primarily as a heavy-duty diesel oil and says it is good for mixed fleet applications. Rotella's additive package contains a lot of magnesium-based detergents which are typically not recommended for gasoline engines.

The way I see it, it either meets API SM or it doesn't. Since it does and if your car calls for it, then I don't see a problem.
_________________________
'02 530i (PU 5W-40)
'08 C300 4Matic (M1 0W-40)
'13 F700 GS (Spectro 15W-50)

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#2245961 - 04/28/11 11:43 AM Re: Rotella T6 5w-40 in a Gas engine [Re: MrMechanic]
qdeezie Offline


Registered: 08/10/10
Posts: 836
Loc: Charlotte, NC
If your vehicle has an oil consumption issue, you stand to kill your cats, but if you don't have that to deal with, you'll be ok. I've been using the stuff for years in gas engines (especially to clean out sludgers) and never killed my cats.
_________________________
'90 F150 XLT Lariat | PU 5w-30 & RP Filter
'13 Hyundai Elantra Coupe SE | PU 5w-20 & OEM Filter
'03 Ford Focus ZX3 | HDS HM 5w-20 & OEM Filter

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