how long should i go between oil changes?

[blk450er]

First oil change in my 6.4. I bought rotella full synthetic. I pull a construction trailer that weights about 5k (so not really that heavy) 5 days a week. I read in the owners manual that if you tow you should change the oil every 5000 miles, but is that for heavier trailers than mine? Plus with full synthetic I'm thinking I could go a little longer. If I remember correctly if you don't tow you can go like every 10,000 or 10,500 or something like that. Thoughts?

[jesilvas]

First question, do you still have regens?

[Joerobi1]

Originally Posted by blk450er

First oil change in my 6.4. I bought rotella full synthetic. I pull a construction trailer that weights about 5k (so not really that heavy) 5 days a week. I read in the owners manual that if you tow you should change the oil every 5000 miles, but is that for heavier trailers than mine? Plus with full synthetic I'm thinking I could go a little longer. If I remember correctly if you don't tow you can go like every 10,000 or 10,500 or something like that. Thoughts?

I only go 3000 miles an I don't tow, however I'm not using full synthetic. I'm not tuned so I'm worried about the oil getting diluted from the regens so I just stick to 3000 miles

[CountryAggie]

Originally Posted by jesilvas

First question, do you still have regens?

That's a big question. If you are not deleted and tuned, 5k miles max no matter if you have synthetic or not. It is all about the oil dilution. Tuned and deleted I would think 10k wouldn't be out of the question. Just get the Blackstone oil test every time and you can gauge it. Work up to the 10k mile mark.

[blk450er]

Yes, I'm deleted, tuned

[jesilvas]

Well w/no regens, 7.5k is easy. Possibly 10k. Like that other college in texas guy said (), just be sure to get the oil tested.

[superduty6.4]

I use amsoil & go around 10,000km

[reighnman]

Rotella T6 every 5k since I bought it. I've been collecting oil samples every change and when I get 1 or 2 more I'm going to send them all in to get a nice time analysis over the past year, then I'll consider extending. Could send them in now I suppose but meh

[Capt dong]

when i first bought my truck with 36k miles went about 7k miles on the first oil change.

book says 10k mile oil change intervals. after reading here decided 5k is as far as i want to go regardless of driving habits and load.

ive put 17k miles on her now and have a handful of oil changes done. i wont go past 4k miles. valvetrain was chattering a little louder around the 3500 mile mark.

ive observed the oil stays cooler longer, cools down faster, and runs smoother with more frequent changes.

after reading a lot of valvetrain problems id rather keep my oil fresh than risk premature wear.

my first blackstone test was sent in this last change. hopefully everything will look good.

[sanman28]

Amsoil full syn, every 5k miles, fully deleted and tuned. A little hard on the wallet compared to wifes escalade, but this truck makes me smile and she deserves it.