ISC oil capacity

[HD4Mark]

Going to do my own oil change this time. Ordered a Fumoto valve and new filter already. So I look in the Cummins manual for the ISC in our '04 Winnebago Vectra and it says 21 qts 22 total. Look online here RV Cummins Engines & Caterpillar Diesel Engines | RV Engine Maintenance Schedule and it says '03 and up 25qts. I'll get enough to do 25 but it would be nice to know how much ahead of time.

[Mr_D]

It will vary with where the oil cooler is and how it's set up. I just put in 5 gallons and check the dipstick after it's run a short while to get the oil filter filled and add what is needed. It's not super critical. On mine, if I fill it to the full mark it kicks oil out on the toad till it gets to midway between the add and full marks. So now I just set it there and check it daily when we travel.

[Dirtbuster]

My ISC 350 takes 21 qts. If you add to much oil, it will come back out the blow by tube!

Good Luck!

[Cat320]

Just put in as much as you take out...that way you won't over fill it.

[ua40j]

Ditto on the 21qts/22qts....but I like the idea of putting in 5 gallons, running it and then topping off.

There is way too much disparity with the dipstick calibrations.