oil choice for diesel

Shiner,
Curious what oil brand and weight your shop runs?

My new to me 12 CTD has 5w40 in it and I like the way it cranks faster. I will use T6 or Valvoline PB Ext depending mostly on availability. Craig

My '03 5.9 Cummins HO was the first HPCR engine year. The oil stays honey color for the first 2500-3500 miles when new depending on how its was worked.
Now with over 325k miles it starts turning brown around 2000 miles and black at 3500 miles all depending on how hard its worked.
The '03 and up 5.9 HPCR 305/555 engines (non California) had a 7500/15000 oil change schedule. I use the 15k miles oil/filter change much of the time.

fj12ryder wrote:

Slowmover wrote:
My pre-emissions engine can go up to 15k or one year depending on use. Oil stays clear without any heavy work. 220k miles. T-6, Baldwin oil & fuel filter. MOPAR deep air filter

These days it really doesn’t matter. Oil is unbelievably good compared to thirty years ago. Just stick with owners manual and be strict about interval.

FAIW, we run the Detroit’s in the fleet to 30k miles. That’s about 2.5-months.

Your oil stays clear? I've never seen a Dodge Cummins that still has clear oil after about 5 minutes of running. You must have one-in-a-million.

My new to me 01 with 125k I just changed oil and have logged over 1,000 miles since and it's a nice brown color, NOT black. My 98 at 5k was dark brown NOT black. My 11 HO as soon as I started it and checked the next day was BLACK. My current 15 says brown to dark brown not black for thousands of miles.

FishOnOne wrote:

Cummins12V98 wrote:

Slowmover wrote:
My pre-emissions engine can go up to 15k or one year depending on use. Oil stays clear without any heavy work. 220k miles. T-6, Baldwin oil & fuel filter. MOPAR deep air filter

These days it really doesn’t matter. Oil is unbelievably good compared to thirty years ago. Just stick with owners manual and be strict about interval.

FAIW, we run the Detroit’s in the fleet to 30k miles. That’s about 2.5-months.

I can go 15k on my 2015 Cummins also but what does your owners manual say?

Cummins12v98 also left off the 6 months max to change the oil part. It's 15k miles or 6 months whichever comes first. For most folks they time out before the mileage.

Thanks for mentioning that! Precisely WHY I do the oil analysis EVERY change while under warranty. Many other reasons but that is one.

Cummins12V98 wrote:

Slowmover wrote:
My pre-emissions engine can go up to 15k or one year depending on use. Oil stays clear without any heavy work. 220k miles. T-6, Baldwin oil & fuel filter. MOPAR deep air filter

These days it really doesn’t matter. Oil is unbelievably good compared to thirty years ago. Just stick with owners manual and be strict about interval.

FAIW, we run the Detroit’s in the fleet to 30k miles. That’s about 2.5-months.

I can go 15k on my 2015 Cummins also but what does your owners manual say?

Cummins12v98 also left off the 6 months max to change the oil part. It's 15k miles or 6 months whichever comes first. For most folks they time out before the mileage.

Slowmover wrote:
My pre-emissions engine can go up to 15k or one year depending on use. Oil stays clear without any heavy work. 220k miles. T-6, Baldwin oil & fuel filter. MOPAR deep air filter

These days it really doesn’t matter. Oil is unbelievably good compared to thirty years ago. Just stick with owners manual and be strict about interval.

FAIW, we run the Detroit’s in the fleet to 30k miles. That’s about 2.5-months.

Your oil stays clear? I've never seen a Dodge Cummins that still has clear oil after about 5 minutes of running. You must have one-in-a-million.

Slowmover wrote:
My pre-emissions engine can go up to 15k or one year depending on use. Oil stays clear without any heavy work. 220k miles. T-6, Baldwin oil & fuel filter. MOPAR deep air filter

These days it really doesn’t matter. Oil is unbelievably good compared to thirty years ago. Just stick with owners manual and be strict about interval.

FAIW, we run the Detroit’s in the fleet to 30k miles. That’s about 2.5-months.

I can go 15k on my 2015 Cummins also but what does your owners manual say?

My pre-emissions engine can go up to 15k or one year depending on use. Oil stays clear without any heavy work. 220k miles. T-6, Baldwin oil & fuel filter. MOPAR deep air filter

These days it really doesn’t matter. Oil is unbelievably good compared to thirty years ago. Just stick with owners manual and be strict about interval.

FAIW, we run the Detroit’s in the fleet to 30k miles. That’s about 2.5-months.

I'm old school and run Rotella Dino oil and Baldwin filters all around. Change it every 5,000 regardless of time run.