Turbo Cool Down time after spirited driving??

[SnoKing]

Then there is RAM's or 6 months, which ever occurs first!!!!!

 

[Learjet]

Then there is RAM's or 6 months, which ever occurs first!!!!!

except that has been changed to 1 year in the 2019 owners manual:

"Change engine oil every 15,000 miles (24,000 km) or 12 months or 500 Hours or sooner if prompted by the oil change indicator system, whichever comes first."

also they now recommend...for 2019"

"In ambient temperatures above 0°F (-18°C), we recommend you use 10W-30 engine oil such as Mopar, Shell Rotella and Shell Rimula that meets FCA Material Standard MS-10902 and the API CK-4 engine oil category is required. Products meeting Cummins CES 20081 may also be used. The identification of these engine oils is typically located on the back of the oil container. In ambient temperatures below 0°F (-18°C), we recommend you use 5W-40 synthetic engine oil such as Mopar, Shell Rotella and Shell Rimula that meets FCA Material Standard MS-10902 and the API CK-4 engine oil category is required."

 

[JR]

^^^^
I knew that was coming when they went to the hydraulic lifters.

 

[TFucili]

except that has been changed to 1 year in the 2019 owners manual:

"Change engine oil every 15,000 miles (24,000 km) or 12 months or 500 Hours or sooner if prompted by the oil change indicator system, whichever comes first."

also they now recommend...for 2019"

"In ambient temperatures above 0°F (-18°C), we recommend you use 10W-30 engine oil such as Mopar, Shell Rotella and Shell Rimula that meets FCA Material Standard MS-10902 and the API CK-4 engine oil category is required. Products meeting Cummins CES 20081 may also be used. The identification of these engine oils is typically located on the back of the oil container. In ambient temperatures below 0°F (-18°C), we recommend you use 5W-40 synthetic engine oil such as Mopar, Shell Rotella and Shell Rimula that meets FCA Material Standard MS-10902 and the API CK-4 engine oil category is required."

 

[SnoKing]

This is not your grandfather's Cummins!!! I will be 75 in June and think I will just see which one gives out first! SnoKing

 

[kthaxton]

Looks like many more years of telling people 5W-40 is ok in all conditions.......over and over and over again.

 

[Wiredawg]

Looks like many more years of telling people 5W-40 is ok in all conditions.......over and over and over again.

Yep, we're definitely in the Twilight Zone on this one. I just press using Mobile 1 5W40. Best gear oil, filters, additives will continue to be debated.

But, we know what's really best, don't we?

Cheers,

Ron

 

[JR]

This is not your grandfather's Cummins!!! I will be 75 in June and think I will just see which one gives out first! SnoKing

I think I'd take the new engine, your warranty is long expired
Plus, mechanics rates are still ALOT cheaper than a doctor

 

[Killgore]

I think me and my faithful steed have gone from being an antique to a relic. Adding a cluster of gauges that basically told me when it was safe to shut down (EGT's), when I was pulling too hard (temps on the transmission and differential), and whether my additional fuel filters were in need of being changed out, along with the health of my lift pump (dual fuel pressure gauges to measure the Delta factor) is now pretty mundane. Blackstone's OA and Valvoline are still a part of every oil change and maybe those are the only constants except the original mechanic is still doing the work. Now, I'm three times slower and it hurts like hell to roll around on the floor.

 

[Cummins12V98]

Is this new spec all driven by fuel economy???

 

[TFucili]

Is this new spec all driven by fuel economy???

I would say yes, as if you pull up the data sheet for Rotella T4 10W30, it really harps on the fuel savings.

 

[Cummins12V98]

Personally I will stick with 15-40 if I get a 2020.

 

[SnoKing]

Personally I will stick with 15-40 if I get a 2020.

I think the hydraulic lifters want a thinner oil. SnoKing

 

[Cummins12V98]

I use AMZ/OIL 15-40 Diesel marine in the 99 Tahoe 5.7 Vortec with 240k and has no lifter noise along with my GlasPly Boats 350. No expert but that does not seem like a good reason to not use 15-40. Economy is most likely the answer. As long as it meets the spec I would certainly use the 15-40 over the thinner oils.

 

[JR]

I wouldn't be afraid of 10w30 so long as it's designed for it. Cummins Navistar and Detroit have been using it in their bigger bore engines for years now. This includes Freightliner, Navistar, PACCAR, and Mack trucks.
The main reason the ISB hung on to 15w40 as long as it did, up until now the flat tappets and the need for the added film strength.

 

[AH64ID]

5w-40 is still all temp OE spec, so why would a 15w-40 be too thick?

 

[kthaxton]

5w-40 is still all temp OE spec, so why would a 15w-40 be too thick?

Agreed. 40w at operating temp is still 40w, regardless of its cold viscosity.

 

[ofelas]

With their much larger sumps, big rigs run lower oil temperatures than what the relatively tiny oil capacities in our trucks run temp wise.

A 10w30 running 20f cooler in their sumps would be thicker at operating temperature than the same 10w30 in our trucks.

 

[Whitewolf]

I have an Edge Insight CTS2. With the EGT probe installed I have the ability to tell the engine how long to idle or at what temp to idle to before it shuts itself off. I currently have it set at 350 deg, I may have to raise that a bit when it becomes summer here. Had it installed last fall just before the snow came.

It's a pretty nice feature. I push the button to the shut the engine off, lock the doors and walk away. If it's at or below 350 it shuts down. If not, it idles until it gets below 350.

 

[Ozymandias]

Today's Class8 engines run incredibly high oil temps all day long for emissions reasons.
240-250F. Even when idling.
Also the exhaust Temperature stays up to keep the CAT and DPF happy.