Bus Oil

[Frank @ TX]

I heard in the past that Delo #400 was not a good oil for 6V92.
I'm right now looking for oil and found some Delo #400 -40W - CF2.
Why would this oil not match the DD spec for #92 oil ??
Frank

[muldoonman]

Frank, haven't got a clue but was told run Delo 100 in my 8V92TA. Folks say 400 will just start running though it. We will get a  schooling shortly. 

[RJ]

Frank -

What you've found is probably some stock that's been sitting on a shelf in a warehouse somewhere, and now they're trying to move this old inventory.  So for a little background: At one point in time, Delo 400 40w CF-2 was produced by Chevron alongside Delo 100.  D-400 had a little higher sulfated ash content than D-100, but it still met Detroit 2-stroke specs, thus was ok to use.

Chevron then reformulated D-400, and it no longer meets the DD 2-stroke specs - even says so on their website - but is ok for the 4-stroke engines.

Just don't use any multi-weight oil in a two-stroke.

Beyond that, when Clifford (luvrbus) chimes in, listen to him, he's the expert.

FWIW & HTH. . .

[luvrbus]

I am not even going there RJ but it is well document by DD the engine wear is less with higher contents of ash in the oil than the lower ash oils use straight 40W whatever brand you run

[Van]

Awe c'mon you guys, aren't all oils the same? lol  

[John Z]

Wait, wait guys. Let me go make some popcorn and grab a cold drink. This could be good.

[Cosmo]

What about Amsoil? Just pulling your chain lol, I know I'm new to bus motors, but everything I've read and knowing a very good diesel bus mechanic, he swears by Delo 100 40wt. Problem is, getting hard to get, so I hear. I just picked up three cases in OKC and there is a lot more where that came from. Lucky for me, when I got my bus I also got the service manual that goes with it. I have a lot of questions, but I'll save them for a different post. Still need to get pictures posted.

[Frank @ TX]

Thanks guys
Frank

[Oonrahnjay]

I am not even going there RJ but it is well document by DD the engine wear is less with higher contents of ash in the oil than the lower ash oils use straight 40W whatever brand you run   

    When I stated in this business, the ratings were about SE and CC ("S" is the rating for Spark ignition/gasoline engines and "C" is Compression/diesel engines).  Up to about SE and CF, if you went to a higher letter, it was a better oil -- more protection for the engine, better performance, etc.  After that, it got "political".  The new oils were formulated for something that the gummints around the world threw at the oil companies -- better fuel economy, lower oil burning for emissions, less fouling of catalysts, lower particulates etc.  For most of them the ratings, the improvements were impressive for *What They Were Trying To Regulate*!  But in a lot of cases, the lubrication qualities, engine protection, prevention of wear or corrosion ... not so good.  Listen to Clifford, the "newer" oils are NOT always the better oils.
    (PS - the suffix on "C" ratings in the type of engine; "CF-2" is an oil rated for 2-stroke diesels, "CF-4" is an oil rated for 4-strokes.)

[Dave5Cs]

Whats the Spark plug gap set at on a DD!....

[luvrbus]

LOL I get a big kick from the oil debate people beat it to death here and then pay no attention to the fuel and antifreeze specs for these old engines, there is not much one can do about the fuel specs you buy what they sell at pumps 

The oil companies decided back in 70's they were not going to make a special fuel for the strokes so it has been No 2 fuel for years same with the oil, people are fooling their self thinking the oil companies are going to make a special oil for a obsolete  engine no matter what is said on the internet

good luck

[Audiomaker]

And additives like Lucas Stabilizer?

[gg04]

Still running Royal Purple 50wt..In my bus and race truck....rdw