8v92

It will use about a quart per 1000 miles, maybe even 500 miles if it is real thirsty. You need to check it every day.

 

The later engines had most of the oil leak problems solved with better gaskets, cast aluminum pans and covers, etc.

Detroit never recommended a multi-grade oil for them so you'll need to run straight 30 or 40 wt.

My kid's Eagle bus does much better on oil with the single grade... he has an 8V92.

 

Never 30W, always Delo 100 40W and not Delo 400.

 

As previously stated, the 318 is a common "nickname" for the 8-71; 318 referring to the supposedly rated horsepower. 8-71s were also commonly found in the 350 (turbocharged); 290, and 260 hp (usually fleet versions).

Many of you probably already know that the model numbers on those Detroits referred to number of cylinders, and cubic inches per cylinder.
The 71 cu in/cyl engine could be found in 2,3,4,6,8,12,16,24 cylinders.
6-71; 8-71; 12-71s were available in trucks.
The 92 cu in/cyl version came out much later. There may be others, but I am only aware of the 6-92, and 8-92 which were available in industrial, marine, and truck applications; not sure, but I think they also had a 12-92 industrial/marine.

I also worked on a tug that had two 6-110 Detroits rated at around 750hp/ per engine. IIRC

Back in the 1960s, 70s and 80s, Detroits were very popular in marine, industrial, and oilfield applications.
Tough, cheap parts, fairly easy to work on, they were pretty common in our area. If you heard the comment "check the fuel, and fill her up with oil", you knew someone was referring to a Detroit.

 

As stated, the later engines were not big oil leakers. But remember that this is a 2 stroke and poor fuel mileage compared to todays engines.
With the 92 series wet (cyl) liners & top hat O ring, very suscesptable to over heating damage, happens very quickly. Steam blows out the O ring, hello coolant in the oil problems.
I run a 6V92TA, no current oil leaks, rebuilt 50K ago. Poor mileage, but works for me.