straight 40 wt.

[Jon Wehrenberg]

Ken,

If you are interested you might want to contact DD and see what their tech people say about that particular oil. That might be something to share not only with POG, but the Prevost Stuff site.

I have learned not to trust an opinion from a tech or a dealer, (buses or planes). Sometimes we get fed old wive's tales, sometimes we get fiction disguised as fact and a lot of the time we get the truth. It is hard to sort out the fact from fiction so I try to do my own homework

[bluevost]

I have another one for you guys to ruminate over.

I had a problem in my tranny, sensor was reading low transmission fluid and would not allow me to put the transmission in gear. I managed to get to Prevost Mira Loma thinking a fluid and filter change would fix the problem. When the tech was adding fluid I asked him what he was using and he said Dexron (sp?) III. OK.

After the service, the sensor was still misreading. So I took the bus over to a DD/Allison place, literally across the street from Prevost. They dropped the transmission, put in a new sensor, and filled the transmission with Syntech (?). I said "what about Dexron III?" The tech says you should never use Dexron III in this transmission. New trannies come with Syntech.

Go figure!!!

[Ray Davis]

When I first purchased my bus I took it to Prevost Mira Loma for a complete oil change and transmission service. At the time I told them to put in the synthetic in the tranny, since I heard "that was the way to go".

Before actually servicing, they called me and basically told me we'll put in the synthetic "if you want", but for the transmission mated with the 8v92, they recommended regular Dexron. They indicated those transmissions don't get hot enough to warrant the synthetic, and said I would be wasting a lot of money putting it in.

ray

[dalej]

And like my seals that I'm relacing, I called two reliable Prevost service people that I like (one older and one younger) to see what to refill the rear drive and tag with. The younger one said 85-140 EP and the other said 80-90 weight EP. I decided to put 80-90 in cause it just sounded right. They both said that Synthetic would not be neccessary since I only put 10,000 miles on a year. They both said every two years or close to that.

[Jerry Winchester]

Well I use Delo 100 in mine, but I didn't think they made 400 40wt, but they do and some folks use it in 2 cycles. In my ignorance, I stuck with the Delo 100 as that is about all I can get around here.

[bill&jody]

for what its worth, i can email the DD fuel/lube oil spec as a 2M pdf. forum limits prevent me from uploading it here altho it seems to allow 47M jpegs. go figure.
drop me an email if you want it.
wmm

[Jim_Scoggins]

Just for info and not to belabor the obvious. Shell Rotella 40 wt meets the Specs per the Detroit 8V92 owner's manual. Used it in my 8V92 in my 86 Bluebird. I had also switched the tranny over to Transynd primarily because of the higher temps in that it had a transmission retarder.

[Joe Cannarozzi]

Is there any truth to a suggestion that I have heard about the oil level in a Detriot 2-stroke?

I have read comments on other boards that suggest that if you let the level stay closer to the fill mark than the full mark it will use less of it?

I don't like the idea just because I don't like the small 7gal capacity in the first place but if the thing is gonna just push it out quicker above that point, as these comments suggest, I'm willing to entertain the notion.

Has anyone heard or experianced this?

[Jim_Scoggins]

Joe:
I don't know if it is urban legend or not but for me it seemed best to run it about half way up the dip between add and full. Seemed to use it rather quickly when I topped it off to full--down to about half way then stay there. After a time I considered half way to be my full mark.

[Kevin Erion]

I think that is true with all large engines, I have trucks with Cats, Cummings and the series 60 in or Prevost. I have 01, 04 and 06 engines and if you fill to the top they will just push the oil out the draft tube to the 1/2 way point and stop. I always test each engine first by keeping them full and if they end up at 1/2 then thats where I refill when I change the oil.
Kevin