WJ + XJ Rotella T5 10w-30 vs. Mobil 1 high mileage vs. Castrol high mileage. - Page 2 - JeepForum.com

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post #16 of 117 Old 05-05-2012, 07:02 PM
86cj74.2L
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I've been running the T6 5w40 year round in the 4.2l in the CJ for 30,000 miles. Broke it in on havoline

25psi at idle and 60+ above 45mph.

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post #17 of 117 Old 05-05-2012, 07:41 PM
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Originally Posted by 02grandy View Post
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.
Great choice!
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post #18 of 117 Old 05-21-2012, 01:18 PM Thread Starter
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not happy with the oil on both jeeps maybe its the syynthetic part but both engines are much louder. you hear it i guess in the top end. the lifters the rockers valves whatever. the high mileage oil seems do the noticeably better job with keeping the engine quieter. if the only better thing about the oil is that it has higher amounts of zinc and the engine doesnt run any better now what ????????????? hmmmmm the cheaper high mileage castrol gtx is looking nice again
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post #19 of 117 Old 05-22-2012, 07:38 AM
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I just ran Rotella T5 10W-30 for 3500 miles in my 4.0. It was definitely noisier than other oils. I'm going to put Rotella T 15W-40 back in for the summer and then probably go to a 5W-40 or 10W-40 for winter.

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post #20 of 117 Old 05-22-2012, 07:47 AM
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After putting in a new camshaft and lifters, I started with Rotella T Triple Protection for an oil change or two then stepped it up to the T5. I use 10W-30. I haven't noticed any issues with noise - no lifter tick or anything like that. Perhaps having new lifters quiets down the top end chatter... Just throwing in my .02 for added reviews.

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post #21 of 117 Old 05-22-2012, 10:46 AM
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Rotella is thick stuff, top end noise often tends to quiet down on thinner, not thicker oils. The Castrol HM is really thick too, but it's an entirely different add pack which also makes a difference in noise.

If you want quiet you might try plain old Pennzoil 10w30 SN (the new stuff) tons of moly makes the 4.0 really quiet.

I like an engine to be quiet as possible too, but from a review of UOA's noise is not an accurate reflection of engine wear. Valvoline for example consistently produces very low wear numbers in the 4.0 but it's not very quiet on it.
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post #22 of 117 Old 05-25-2012, 08:37 AM Thread Starter
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im sure the head on the grand can use alittle rebuild since ive always had a noise. ive seen the pics where people pull the lifters out and worn to crap. the 99 not until i put in this .. what i remember now is when i used the mobil 1 high mileage 10w-30 it is doing the same as the rotella t5 10w-30 . which is the larger over all engine noises . castrol GTX HM 10w-30 has made both of them just run at normal engine noise level. the 99 is newer i never got to put mobil 1 in so the a couple oil changes i did were the castrol gtx hm now with the t5 much louder.
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post #23 of 117 Old 05-25-2012, 09:12 AM
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Last oil change I put T5 10-30 in and its noisier than when I had the T6 5-40 in, so next change im going to try T5 10-40 (Found at TSC or Napa although they must order it) and see how the 4.0 likes it. One things for sure, those lifters are noisy with the 10-30 in there. I have 3 gallons of CAT syn deo in my garage but I havent used it because being a dedicated DEO I know its not safe for catalytic converters.

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post #24 of 117 Old 05-25-2012, 11:34 AM
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I have Pennzoil in mine again for the time being, very quiet, also later added a half can of MoS2 and it's queiter still. The 4.0 loves that moly.
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post #25 of 117 Old 08-01-2012, 07:46 PM Thread Starter
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still have the t5 10w-30 in both jeeps it might have quieted down a bit i just dont want a piston rod of something breaking on my baby i want it to go to 300k no problems lol
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post #26 of 117 Old 08-02-2012, 12:25 AM
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Quote:
Originally Posted by 02grandy View Post
still have the t5 10w-30 in both jeeps it might have quieted down a bit i just dont want a piston rod of something breaking on my baby i want it to go to 300k no problems lol
I really wanted the same thing too, but my skirt bit the dust at 244,000. If it wasn't for that im sure it would've kept going right on to 300,000 no problem. But now it'll make it to 500,000 and beyond no problem. I'm glad I put new lifters in though, I've never heard my 4.0 idle so quietly. FWIW before it died I ran rotella T5/6 in 10-30/5-40 flavors and my lifter noise never went away but the engine seemed to like it. Current break in oil is regular Valvoline 10-30 with GM's EOS for the added zinc for 1000 miles. Afterwards its back to Rotella T5 in 10-30 at 5,000 intervals.

I wouldnt worry about the rods in these engines, the 544,691 castings are pretty beefy and arent the weak link in this engine. The pistons are for sure and are garbage compared to what I replaced them with. Jeep KNEW about this issue and still built these engines with the same pistons up until production ended. Also, the factory pistons have to have the absolute thinnest compression rings ive ever seen. If you start hearing abnormal noise (lifter noise is normal, see now I sound like a dealership tech!) then you can pretty much expect thats what it is. Catch it early like I did and youll luck out.

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post #27 of 117 Old 10-03-2012, 08:46 PM Thread Starter
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time for an oil change again. 2 wix filters and .................... im really thinking of going back to the castrol high mileage 10w-30 before i switched over to the t5 because it made everything quiet. so you'd think that would be doing the better oiling job over the t5 right? no noise means you found the right balance of the oil not being to thick or thin is what im thinking????? thats my commonsense
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post #28 of 117 Old 10-03-2012, 09:55 PM
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would the rotella 10w 30 work on a 4.7 non ho. i have a very light cold start tick in the lash ajusters. was running castrol gtx 10w 30 dyno oil with wix filter. changed every 3000 miles, just want to know if the rotella would offer any better protection?
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post #29 of 117 Old 10-18-2012, 07:24 AM
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Curious myself as to which one will work better. I've been using Castrol GTX HM 10w-30 for the past three oil changes with a mopar filter.

Since it's been getting below 40 degress lately, I've noticed a slight ticking
on cold startup. Goes away after a minute or so.

I might try the Rotella this time around. The engine has around 100K on it,
so it's well broken in

Steve

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post #30 of 117 Old 10-18-2012, 07:33 AM
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I'm changing my oil this weekend (Rotella T5). I really pushed the OCI on this one - partially to see how it turns out, partially because I've been so busy lately. I'm going to send it to Blackstone Labs for an oil analysis. I'm hoping to be pleasantly surprised. I'll let you know how over running the T5 turns out.

~Chris
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