300SDL oil change interval on Rotella T5 - PeachParts Mercedes-Benz Forum

tjts1 · #1 05-16-2018, 02:04 PM

7500 miles.

marco5 · #2 05-16-2018, 02:10 PM

Quote:

Originally Posted by tjts1

7500 miles.

Never change your oil, even synthetic, at 7500 miles in a 30+ year old diesel. Use quality dyno/synethetic 15w40 and change every 3k miles. When the car was brand new in 1980's, and the engine was new, it was okay to follow this recommended service interval 5000miles+. These engines are decades old and have hundred's of thousands of miles on them.

Doing an oil change is the most inexpensive maintenance item you can do, do it early, use quality parts, and have peace of mind.

CDTurbo001 · #3 05-16-2018, 02:25 PM

Quote:

Originally Posted by marco5

Never change your oil, even synthetic, at 7500 miles in a 30+ year old diesel. Use quality dyno/synethetic 15w40 and change every 3k miles. When the car was brand new in 1980's, and the engine was new, it was okay to follow this recommended service interval 5000miles+. These engines are decades old and have hundred's of thousands of miles on them.

Doing an oil change is the most inexpensive maintenance item you can do, do it early, use quality parts, and have peace of mind.

And chemistry has come light years. If these engines gained their reputation for longevity on 70's dino oils @ 5K intervals, there's no reason an interval close to that with today's oils won't keep a healthy engine together just as well.

tjts1 · #4 05-16-2018, 02:53 PM

Quote:

Originally Posted by marco5

Never change your oil, even synthetic, at 7500 miles in a 30+ year old diesel. Use quality dyno/synethetic 15w40 and change every 3k miles. When the car was brand new in 1980's, and the engine was new, it was okay to follow this recommended service interval 5000miles+. These engines are decades old and have hundred's of thousands of miles on them.

Doing an oil change is the most inexpensive maintenance item you can do, do it early, use quality parts, and have peace of mind.

230k miles with 10k mile oci, 400+ psi compression on all 6 cyls even with a cracked #14 head on cyl 4, 5, 6, and zero chain stretch. I'll let you know when 10k mile oci kills it.