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Rotella T1 30w not for high speed engines? #4242701 11/06/16 05:24 AM
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HYPER Offline OP
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Just bought a gallon of Shell Rotella T1 30w for our new Generac 10000w generator for its first oil change when it reaches 10hrs(at 9hrs after tonight). We run a BMX track that's off the grid, and will put the generator through an average of 10hrs every week with 4hrs during Wed. practice at 40% load! and 6hrs during Sat. races at 80-90% load(flood lights, concession stand).

Anyways, I checked the Shell Rotella website and in its description for the exact oil I bought, it states that it's not recommended for high speed engines. I never heard of an oil that's not recommended for high speed engines. Is it because the oil might foam?

The Generac engine is a V-twin 18hp with a pressurized oiling system, oil filter and oil cooler, and runs at 3600rpm at load, and I would guess that would be high engine speed.

Now I'm considering Quaker State Advanced Durability, Castrol HD, or SuperTech HD in straight 30w. Any recommendations?

Re: Rotella T1 30w not for high speed engines? [Re: HYPER] #4242714 11/06/16 06:23 AM
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skyactiv Offline
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I'm a semi mechanic for UPS. I'd find something else to use. I'd probably use Quaker State Ultimate Durability 10W30 in it myself.


Wife: 15' Audi A4 quattro 6 speed manual
Me: 18' Elantra Sport 6 speed manual
The rude guy that points out reality


Re: Rotella T1 30w not for high speed engines? [Re: HYPER] #4242720 11/06/16 06:35 AM
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I forgot to mention that it'll always be operating in tropical 75+ degree weather.

Re: Rotella T1 30w not for high speed engines? [Re: HYPER] #4242741 11/06/16 07:12 AM
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AirgunSavant Offline
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Can't be no worse than a zero turn.
What skyactiv said and similar like 10w30 Magnatec etc.

Re: Rotella T1 30w not for high speed engines? [Re: HYPER] #4242747 11/06/16 07:17 AM
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dlundblad Online Happy
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Is that straight 30 Rotella technically gas rated? It should have an API S something in a circle if it is. Last I looked, I don't think it was. Nonetheless, I would read their "not for high speed engines" verbiage as it isn't for use in diesel passenger vehicles, semis etc. 3600 RPM isn't very high IMO for say an off-road diesel application requiring a straight 30.

What does the owners manual say? Sometimes they give you a choice depending on temperatures.

You'll get a wide range of answers here on BITOG. Any 10w30 be it a passenger car motor oil or a heavy duty duel rated diesel oil, straight (gas rated) 30, duel rated 15w40 or 5w40 diesel oils.

All should work fine for you, but I'd check the owners manual. Follow the suggested change intervals too.


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Re: Rotella T1 30w not for high speed engines? [Re: HYPER] #4242837 11/06/16 09:06 AM
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This is why I like Delo, no confusing and/or clashing info. The Rotella you bought will be fine, but seriously give the Delo 400 30 PDS a read sometime, as it clearly states that its a dual purpose API CF/SJ engine oil. Personally I would stick with the SAE 30 and NOT use an ILSAC 10W-30 as some have suggested, especially considering the temps you'll be operating the engine in.


05 Chevy Impala
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Re: Rotella T1 30w not for high speed engines? [Re: HYPER] #4242844 11/06/16 09:16 AM
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'95 Chevy 1/2t 305 208k -NexGen Maxlife 5w-30, Wix filter
'04 Crown Vic 95k Maxlife full syn 5w-20
Re: Rotella T1 30w not for high speed engines? [Re: HYPER] #4242908 11/06/16 10:53 AM
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doitmyself Offline
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It just depends on who YOU want to believe. A few years back, the general consensus here was that any oil good enough for diesel use was more than adequate for gasoline use. I decided to stop using it in my gasoline OPE.

https://bobistheoilguy.com/forums/ubbthreads.php/topics/2305551/1

Re: Rotella T1 30w not for high speed engines? [Re: HYPER] #4242922 11/06/16 11:12 AM
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Ramblejam Offline
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Originally Posted By: HYPER
Any recommendations?


You only bought a gallon; even in Hawaii, oil is cheap relative what a new generator costs. Go pick up another SAE 30 that carries an API gas engine spec (for the sake of your warranty, if nothing else).


Re: Rotella T1 30w not for high speed engines? [Re: HYPER] #4242928 11/06/16 11:18 AM
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Rand Offline
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Shell ROTELLA® T1 oils are suitable for use in many turbo- and non-turbocharged light/medium-duty diesel-powered trucks and transport operations, including city operations and long-distance service.
Shell ROTELLA® T1 can provide dependable lubrication for small-to-medium-powered agricultural equipment, such as tractors. Also suitable for many low/medium-powered stationary applictions such as diesel-powered water pumps, generators, etc.

Seems like its fine for a diesel generator.

Its not a gasoline rated engine oil however.

I'd probably use a 15w40 oil in a heavily loaded air cooled generator.
most likely will get quite hot.


2019 Jeep Cherokee Trailhawk 2.0T
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Re: Rotella T1 30w not for high speed engines? [Re: HYPER] #4242957 11/06/16 12:26 PM
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Eddie Offline
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T1 is not rated for a gas egine as stated above. I would look at T5 in 10w30 or 10w40. Ed


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Re: Rotella T1 30w not for high speed engines? [Re: HYPER] #4242976 11/06/16 12:58 PM
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Red91 Offline
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You guys are crazy. There's no reason why he shouldn't use T1, and/or an SAE 30. Maybe Broc Luno or Shannow will chime in soon. I can't be the only who knows the 30 will be an overall better lube, especially with the OP's above 75 degree temps.


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Re: Rotella T1 30w not for high speed engines? [Re: Red91] #4242982 11/06/16 01:08 PM
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Ramblejam Offline
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Originally Posted By: Red91
There's no reason why he shouldn't use T1

He has a brand-new generator that specifically calls for "API SJ, SL, or better."

Rotella T1 (even though it once did carry SJ, before reformulation per Shell) does not meet this requirement.

Originally Posted By: Red91
You guys are crazy.

Have you dealt with Generac service providers regarding warranty coverage?

Consumer-level generators in constant service have one of the highest engine failure rates I know of. T1 certainly wouldn't be of causation, but it'd give them enough wiggle room to deny approval.

I presume that if you're so ardently arguing for T1 here, that you're also willing to cover the cost of a new generator for him, correct?

Re: Rotella T1 30w not for high speed engines? [Re: HYPER] #4243013 11/06/16 02:10 PM
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Red91 Offline
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Actually I'd rather run Delo. That's why I suggested he look up the PDS on 400 mono grade, but one OCI of the T1 isn't going to to kill it. A lifetime of T1 isn't going to kill it. Shell has a habit of complicating oil recommendations as to not step on it's own toes in regards to profits. They sell a lot more T4, T5, and T6 than they do T1, so they push what sells and don't push T1 in those areas, even though it's perfectly acceptable. If his engine fails on your recommendation, are you going to buy him another one? He's brought his case to an online forum, and if something happens he opened himself up to that.

I keep saying he, could be a lady.


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Re: Rotella T1 30w not for high speed engines? [Re: Red91] #4243014 11/06/16 02:12 PM
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Rand Offline
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Originally Posted By: Red91
You guys are crazy. There's no reason why he shouldn't use T1, and/or an SAE 30. Maybe Broc Luno or Shannow will chime in soon. I can't be the only who knows the 30 will be an overall better lube, especially with the OP's above 75 degree temps.


You appear to be blind. Slinging around words calling people crazy...

you appear to have missed!

The oil isnt rated for use in gasoline engines and will therefore void the warranty.


Fyi: a generator at 3600rpm would not be considered high speed imo.

Most generators will reach very hot temps. No reason NOT to use a 15w40 esp. in a full pressure lube system.. that will likely see oil temps over 250F

The 15w40 will be thinner at operating temp than the 30w would be at 100C


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