HR34Jordan

No low coolant warning! The gauge showed a little higher than normal, but it was hot and muggy. Both directions it took about 45 minutes...

That was it, I think! It took a gallon and a 1/4 to fill back up. I have no leaks that I can find but where did it go? Thank you for the...

You nailed it! After going over everything again I found that my coolant was low! It took 1 gallon and a 1/4 to fill it back up. I never...

The check/stop engine light happens as I'm going down the road about 45 minutes into the drive on both occasions. All gauges are normal...

Sorry the oil I'm using is Rotella 15/40 Synthetic.

I am using a WIX oil filter. If it is over filled it's only by 1/2 quart. All gauges look fine while driving but I did notice at idle...

No, I don't but I guess I better take it somewhere to get checked.

2003 HR Neptune. Sorry to all, this may be long winded. After I changed the oil and both fuel filters on my Cummins 300ISB which I have...