What oil for 2020 cummins? - Merged oil threads

[AH64ID]

Very interesting tread this one. Being in Australia and living in Canberra we have the full spectrum of ambient temp. Just for 2024 we had -8 to 38 DegreesC. During our December/January trip in South Australia the day will start at 23 at 07H00 in the morning and by 11H00 be 45 DegreesC. You wont believe this but been trying from a month before picking up my truck to get a 5W40 CK4/CJ4 API Full Synthetic engine oil and just cant. Been trying every week with all the suppliers Castrol, Fuchs, Shell, Petronas, Pennrite, Liqui Moli, nothing I have to buy online from the US and this is driving me crazy. So for now because of the low temps I am running the Fuchs Titanium Cargo 5W30 CK4 Full Synthetic and when its warmer I will switch to 10W40 and at this stage I am running genuine filters all round.
Not sure if the 5W40 CK4 is a too new oil in demand and not caught up yet or what the reason is but I would love to use a 5W40 all year. Maybe there is another Aussie that has figured it out on here.

Interesting you can’t get 5w-40 CK oil, it’s really not that new here in the US.

I’ve been as cold as -18°F (-28°C) and as warm as 112°F(45°C) with this truck and run 5w-40.

If you can find a good 10w-30 full synthetic, Group IV, that would be just fine year round.

 

[T143]

Interesting you can’t get 5w-40 CK oil, it’s really not that new here in the US.

I’ve been as cold as -18°F (-28°C) and as warm as 112°F(45°C) with this truck and run 5w-40.

If you can find a good 10w-30 full synthetic, Group IV, that would be just fine year round.

Its insane its been 3 months trying every avenue bar buying and shipping it from the US. Not sure what you mean by Group IV oil? I will google too lol.

 

[T143]

This is what I am using. Nowhere on the website do they say POA full synthetic.
I will check the container on Monday and take a photo.

 

[OLEJOE]

Does anyone have any oil analysis they have done running the Amsoil ADO 5-40 ?

 

[AH64ID]

Does anyone have any oil analysis they have done running the Amsoil ADO 5-40 ?

I only did one sample before selling the truck, and the motor was still relatively young. Had I kept the the truck I would have done another sample, I was still using ADO when I sold it.

 

[OLEJOE]

I only did one sample before selling the truck, and the motor was still relatively young. Had I kept the the truck I would have done another sample, I was still using ADO when I sold it.

View attachment 89661

Thanks

 

[SNJerz]

I use Valvoline Premium Blue 5w40 synthetic and Fleetguard Stratapore oil filters for mine.