WJ + XJ Rotella T5 10w-30 vs. Mobil 1 high mileage vs. Castrol high mileage. - JeepForum.com
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Unread 05-04-2012, 11:47 AM   #1
02grandy
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Wj WJ + XJ Rotella T5 10w-30 vs. Mobil 1 high mileage vs. Castrol high mileage.

02 grand 4.0l
99 xj 4.0l

beside the oil question are both these engines the same or do they have different heads or other different parts? the only noticable thing i see is one has a manaul belt tensioner and one is automatic.

it looks like mobil 1 and Rotella seem to have the most zinc that we look for according to what i have been reading but does the Rotella T5 synthetic "blend" (not full) have more or less than the regular T or T3 and does the mobil 1 high mileage have more or less than both of those?? all in 10w-30. I use to use the Mobil 1 high mileage and switched to the castrol high mileage. I use a wix filter also . when i bought this about 2 years ago I had the flappy, ticking slappy noise that was on start up and was trying a few didnt brands to see if it changed it . the castrol high mileage i rarely hear it now with the cold weather or cold start ups. this rotella id like to try. what do you guys know about the zinc levels and have you had any experience with the Rotella vs the mobil 1 HM even the castrol HM????????? thanks

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Unread 05-04-2012, 12:52 PM   #2
billzcat1
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The Castrol High Mileage is really low zinc (640ppm). I would never run it in a 4.0. The additive package is "weak" at best. Low zinc, low phosphorus.

The Mobil 1 High Mileage is what I run, it is over 1000ppm zinc. The UOAs on both my old 4.0 and my current 4.7HO are very good with this oil at 6000 mile drain intervals. I use Wix or Napa Gold filters both for air and oil, although I prefer the Wix-branded air filters; they use a different element than the Wix-manufactured Napa Gold.

Rotella (both T and T5) 10W30 has an extremely stout add pack. Twice the calcium of the Mobil 1 and 1200ppm zinc. It also has a high TBN, good for extended drain intervals. I haven't seen it on the shelf in 10W-30 though, usually I see 5W40 or 15W40 so I haven't run it.

Either the Mobil1 HM or Rotella will suit your needs very well. Use whichever is the cheapest and most readily-available. I would start with 5000 mile change intervals and have the oil analyzed by Blackstone Labs ($25). They will tell you if your engine wear is looking good (for instance, is that rattle you hear lifters or piston slap? A high concentration of aluminum in your oil sample will tell) and if you can comfortably extend your oil change intervals.
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Unread 05-04-2012, 01:10 PM   #3
seu83
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Usually walmarts carry the Rotella t5 in 10w-30 for about 16 a gallon. They even carry the Mopar filters, at least around here anyway.
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Unread 05-04-2012, 02:10 PM   #4
FrankU
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I run the Rotella. Why because I like it. When you comparing the Mobil HM and Shell Rotella T5 the difference is negligible. Both are very good for our app's.
Try to stay away from the Castrol HM for the reason's stated above. These are older "style" engines and the valvetrain is going to need the zinc offered in the Rotella T5-6 and Mobil 1 HM. Can't go wrong with either Rotella or Mobil 1 HM. If your going to use Mobil 1 just make sure it is the HM.
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Unread 05-04-2012, 02:25 PM   #5
billzcat1
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Quote:
Originally Posted by seu83 View Post
Usually walmarts carry the Rotella t5 in 10w-30 for about 16 a gallon. They even carry the Mopar filters, at least around here anyway.
I'll have to check that out then. I've been getting my M1HM from WalMart since it is so cheap... but that's the only reason I ever go to WalMart. There isn't one close, I have to drive 20-25 miles to get to one that reliably keeps their oils fully-stocked. The one that is slightly closer is always out of stock on M1HM. I'll keep an eye out for Rotella and maybe give it a shot. I need to get my next 2 UOAs back first and then make a decision.
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Unread 05-04-2012, 02:46 PM   #6
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Rotella would be a prime choice, it has more zinc/phosphorus than the Mobil 1, and more additives, but a lower grade of base stock. The Rotella T5 10w30 is readily available at most Walmarts, the conventional Rotella 10w30 can be had on sale every few months at Advance AP for even less (right now I think). There is no difference between the two except the base stocks, add packs are identical and both will serve you very well. The T5 being a synblend has better cold flow, the fact that it's available anytime you want at Wally's for a good price is a bonus too.

The Mobil 1 High mileage mentioned previously is probably the best synthetic match for the 4.0, I'm not a fan of Mobil in the 4.0 but the HM version does well according to others. You'd be better off with the 5w30 and a booster quart of 10w40 though, you'll get better base stock, higher VI (cold flow) and still get 10w30 thickness and performance in the heat doing so. Valvoline Maxlife full synthetic supposedly exists and would be a great choice also but good luck finding it at a reasonable price.

Everybody has their opinions on oil, that's what makes discussion fun, and I disagree with the idea Castrol HM is not a good choice for the 4.0. I don't believe the zinc number posted is accurate, but it will certainly have less than Rotella or Mobil HM, it is however very thick for grade with a high viscosity range. Your own experience with it as well as mine has been positive, and I've seen a number of used oil analysis on it in the 4.0 that indicate the 4.0 does very well on it. Valvoline Maxlife (the common red bottle syn blend) is somewhat similar but thinner, it also does very well in the 4.0.

Pretty hard to make a "bad" oil choice these days. My 4.0 actually runs quietest on plain old Pennzoil, several other Jeepers have experienced the same thing, lots of good options out there and you don't have to spend 5+ bucks a quart for many of them.
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Unread 05-04-2012, 02:54 PM   #7
billzcat1
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Quote:
Originally Posted by KayCeeJeep View Post
You'd be better off with the 5w30 and a booster quart of 10w40 though, you'll get better base stock, higher VI (cold flow) and still get 10w30 thickness and performance in the heat doing so.
Oddly enough, the 10W30 M1HM has a slightly lower pour point than the 5W30 of the same oil, although their low temperature viscosities would naturally have the 5W30 flowing better. I'd just stick with the listed weight for whatever engine you're working work.

Quote:
Originally Posted by KayCeeJeep View Post
I disagree with the idea Castrol HM is not a good choice for the 4.0. I don't believe the zinc number posted is accurate, but it will certainly have less than Rotella or Mobil HM
The number I posted above I obtained from the following source: a Blackstone VOA of Castrol GTX High Mileage 10W-30. The thread echoes my comments about it being a fairly unremarkable oil.

Of course there is more to oil these days than what can be detected with spectroscopic analysis, but good add packs are still good add packs. Older engines like the 4.0 respond well to traditional oil formulations, SL-rated and earlier.
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Unread 05-04-2012, 03:43 PM   #8
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The Mobil site has 5w30 HM listed at a -39 pour point and the 10w30 HM at -37, but pour points are not much use anyway. The real kicker is viscosity, the 5w30 is 69 at 40C whereas the 10w30 is 78. The most important way of determining thickness though, which many don't understand, is the HTHSV - the 5w30's is 3.3 whereas the 10w30's is 3.5. That means the 5w30 is thinner at all temperatures than the 10w30, and therefore will flow better. The 5w30's VI is much higher too, again promoting flow, 165 for the 5w30 versus 149 for the 10w30. The 5w30 is a much superior oil at the same price, you might as well get what you're paying for, since our Jeeps need an extra quart it can be boosted a bit with a quart of 10w40 if something even thicker is desired without having much negative impact on the VI, the 10w40 although thicker has high VI as well unlike 10w30 which is a small jump over a straight grade oil.

All that and I don't even care for Mobil.

I had seen that UOA you mentioned but unfortunately its Blackstone who consistently produce some strange numbers, when it comes to Blackstone if it doesn't look right it probably isn't. When the PQIA independently tested regular Castrol GTX in 2011 it had nearly 800 ppm zinc, the HM version is certain to have at least that and most likely has more. Bottom line though is it works.

To each his own though, like I said earlier very hard to make a "bad" choice.
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Unread 05-04-2012, 10:21 PM   #9
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i myself believe the Rotella is best for this application. i just got my current WJ (7th jeep) and i just changed oil with cheapo oil and delco filter (work for gm) will run it about another 500 miles to give 1000 miles and then seafoam oil, drain, refill with oil and run for more and drain and change to Rotella and Wix likely. engine is noisey and hoping to quiet down this top end.

i personally wrote off Mobil. Overpriced for what you get. I have found Other oils/synthetic oil surpasses what they claim.
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Unread 05-04-2012, 11:21 PM   #10
billzcat1
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Agreed that it isn't worth the $9/qt at the FLAPS. The WalMart <$5/qt for jugs is a reasonable price. Although I'll be considering Rotella for a future change, can't argue with the pricing and add-pack.
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Unread 05-05-2012, 10:47 AM   #11
KayCeeJeep
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Rotella is a tremendous bang for the buck, I'll likely be putting some in mine today and will run it all summer. All of the HDEO diesel oils are generally a tremendous value, very often on sale too, but Rotella is about the only one you can actually find in 10w30 short of special ordering a five gallon pail.
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Unread 05-05-2012, 01:50 PM   #12
02grandy
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so which one rotella t , t5 or t6 would be ? available around me is the rotella t 10-30 or the mobil 1 high mileage at walmart so if you had to choose between those two???
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Unread 05-05-2012, 01:56 PM   #13
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T5 in 10w-30 which can be found at wally world or tractor supply. Its semi synthetic and has nearly the same specs as T6. T6 is very hard to find in 10w-30 so I used 5-40 instead briefly. Honestly id throw the T5 in there and let er rip for 5,000 miles.
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Unread 05-05-2012, 02:25 PM   #14
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I stopped caring so much about add packs, but I know this: I used Rotella T5 10w30 in my freshly rebuild 4.0 with a Melling HV pump, at the recommendation of members of this forum who'd had good results. I get great Oil Pressure, and zero tapping. AFAIC, that's good enough for me.
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Unread 05-05-2012, 04:37 PM   #15
02grandy
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i just bought (3) 1 gallon jugs of of rotells T5 10w-30 at walmart $16.00 each perfect to do two oil changes. i was surprised they had it so i jumped all over it . this will probably be the future oil for my jeeps.
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