Using oil

[TAN]

Does your 8.1 use oil?? Mine uses 1 qt to every 2925 miles. I was just wondering how much oil others use.

[DriVer]

Quote:

Originally Posted by TAN Does your 8.1 use oil?? Mine uses 1 qt to every 2925 miles. I was just wondering how much oil others use.

The normal oil consumption as defined by Workhorse is that the 8.1L engine may consume as much as 1 quart of oil per 100 gallons of gasoline.

This would be normal in the opinion of Workhorse. My experience varies from this and I don't use that much oil however I might consume a quart of oil ~1,000 miles.

[M&EM]

Quote:

Originally Posted by TAN Does your 8.1 use oil?? Mine uses 1 qt to every 2925 miles. I was just wondering how much oil others use.

In my experience over the past 63000 miles, the oil consumption seems to be very proportional to how hard you work the engine. I have seen 1 quart in 1000 miles of fighting headwinds and hill pulling. I have also seen 2500 miles in easy to mixed driving conditions. I just cant get to most places from where I live to where I go with out first climbing to elevations of 6000 to 7000 feet. I suppose frequent long grade braking also helps suck up some oil too. I didn't see any change to brag about after switching(at27000) to Synthetics either.

Marty

[dieselclacker]

My 8.1 uses about one quart every 2500 miles or so. I change oil at 5000 mile intervals, so usually add one quart at about 2500 after changing, and it is a quart low at change time. Been this way since new, it has just over 40K miles now. I use Mobil 1 10W/30.

Dieselclacker

[Full-Timers]

1/2 qt every 3000 for me.

[Whaler]

I have 13K on my unit,and change oil about every 3K.I seem to burn about a quart in 3K.Seems like a lot to me!

[ron55]

mine uses 1 qt per 1000 miles. I drive the speed limit that said I never had but two vehicles that didn't use oil a 2001 jeep cherokee 4.0 and now a 2007 nissan 4.0 frontier nismo

[paz]

I usually end up adding 1/2 a quart about every 1000 to 1500 miles. Oil usage varies a little, and I agree with M&EM that the amount may depend on driving conditions.

[Gotta_P]

I had to add a quart of oil a month ago while on my way back from a trip to North GA. I had no idea this engine used oil, and luckily I had a 1/2 quart in the basement and was able to add it to the crankcase after I got the add oil warning on the dash. It had me in a panic, but after seeing this thread, I guess a couple quarts of oil will be part of my standard load from here on out...

[DriVer]

Quote:

Originally Posted by Gotta_P I guess a couple quarts of oil will be part of my standard load from here on out...

Paul, I normally have a quart in my locker and I will wait normally until it gets down to the add 1 quart mark rather than adding the half quart. The justification for that is called "Operational Range.'

I also have read material from technical writers that have suggested this is the way to go.

[Petro]

I add about 1 qt every 2500 miles. It has been this way since I purchased it. I believe this is normal.

Don

[wa8yxm]

This reminds me.. Need to check oil.

Mine uses oil when I'm mountain climbing,, Flat lands or gently rolling it ... Well.. perhaps a qt between oil changes. Not much at all.

[txdutt]

so far 2500 miles since I changed it out after buying & hasn't burned any, I know of some folks with older 8.1's in the GM HD pickups that went to 15w-40 oil after noticing oil usage & it went away...I used 10w-30 when I changed it so we'll see...

[Joe Gilbert]

In 45,000 miles I have never been able to add a qt of oil before 4000 miles. This has often included trips over the Rockey Mts. I have also always used Mobil 1, 10W/30. I have always thought that those using 5W oil (of any kind) might use more oil?????

JoeG