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Old 09-20-2013, 03:11 PM   #11
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Re: Who owns a Gillig or Crown with a pancake engine.

"You see Chrome, being highly polished, allows air to slip past it far easier than other metals. This being the case Chrome makes ANY vehicle faster AND more fuel efficient. Haven't you ever wondered why everything in the 50's dripped chrome? In the 50's they put Chrome on all bumpers, around all lights and windows, heck even a couple lines down the side of the vehicle just for good measure. You never know where Chrome may help, that's why every home decor item in 50's was chromed, that little strip at the table was just right to keep elbows from sticking on a hot day. Motto in the 50's was "Of course it needs more Chrome!" And why not? I bet if we were to Chrome a bus it would get 50 MPG at 100 MPH, and as an added bonus it would blind everyone for miles! Of course this is just my opinion, some wind tunnel testing MAY be needed to confirm.... Just sayin'....."

Actually that's not correct. Most of the trim on '50's cars is NOT chrome, it's polished stainless steel. That trim down the sides, around the windows, headlights, etc... that people call "chrome" is not.
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Old 03-13-2017, 05:33 AM   #12
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Year: 1976
Chassis: Crown Coach
Engine: Detroit 6N 71
my crown (soon-to-be) skoolie has a beasty detroit engine. i think it's a 6N-71. looking to change my oil like Tim Monnet. recommended mobil delvac 1230 sae 30. i show 1/3 low (cold) what's the reservoir on this guy, anyone know? i show around $100 for a pail of it. buy the pail or is there another suggestion?
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Old 03-13-2017, 11:20 AM   #13
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Year: 1976
Coachwork: Crown
Engine: Detroit Diesel 6-71
Rated Cap: 52 pax
I have been told repeatedly to use only Delo 100 in my DD671. Its what I have been using. But here is the Factory Crown Maintenance tag.



It gives info for both Detroit Diesel and Cummins
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Old 03-13-2017, 11:58 AM   #14
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Engine: Cummins ISC (8.3)
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The "what oil is best for my DD 2-stroke?" topic has been beat to death in various forums over the last several years. If you search about you will find a ton of discussion.

I have put a bunch of miles on DD equipped equipment and spent hours searching for the definitive answer. What I learned from folks much smarter than I: Stick with Delo 100 30 wt. Not Delo 400. Not Delo 100 10-30.

The big concern is ash content. There have been some other oils that met DD spec but as far as I can find, they are no longer available.

I checked with the local Chevron distributor and they have to special order the Delo 100 - 30wt.

Description:
DELO 100 30 [3]

Product Number:
222403

Edit: I looked back at some of the info and one of the "other" oils that I could not find on the shelf was the Delvac 1230. I checked again and it appears to be readily available now. Might be worth researching?
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Old 03-13-2017, 03:09 PM   #15
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Join Date: Jun 2016
Location: Orange County, CA
Posts: 408
Year: 1990
Coachwork: integral
Chassis: Crown Supercoach II pusher
Engine: Detroit 6V92TAC, DDEC 2, Jake brake, Allison HT740
Rated Cap: 37,400 lbs GVWR
Yes, Delo 100, and no, you need straight 40W unless you're on the North Slope in winter, or maybe straight 50W (if you can even find it) for extremely hot temperatures. Actually any CF-2 rated straight 40W is good. I use Conoco/Phillips 76 T5X, but Shell T1 and a few others are also OK. Just don't use non-CF2 oils (such as Delo 400), or any oil more than 1% sulphated ash, and definitely no multi-weight. I know that the CF-2 rating is now obsolete, but it's still what 2-strokes need. Tejas Bus has some good info on this subject, plus there are innumerable 'discussions' on the BCM and BNO forums.

John
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Old 03-13-2017, 03:21 PM   #16
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Quote:
Originally Posted by Iceni John View Post
Yes, Delo 100, and no, you need straight 40W ............... Tejas Bus has some good info on this subject, plus there are innumerable 'discussions' on the BCM and BNO forums.

John
Thank you John,

The Tejas Bus site is the one I was racking my puny little brain for and could not remember. Good info.

As to what weight Delo for temperate weather goes, my understanding is that 30 wt is the proper choice. I have never encountered 2 stroke DD's running 40 wt.
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Old 03-13-2017, 07:21 PM   #17
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Join Date: Jun 2016
Location: Orange County, CA
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Year: 1990
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Chassis: Crown Supercoach II pusher
Engine: Detroit 6V92TAC, DDEC 2, Jake brake, Allison HT740
Rated Cap: 37,400 lbs GVWR
Steve, I've never encountered anyone here using less than 40W. I can dig out my Detroit book on the subject, but 30W is definitely for VERY cold weather. Everyone I know of with 2-strokes here uses 40W, including the boats. I've never even seen straight 30W CF-2 oil anywhere. If I could find any 50W I would add it to my engine to make a 45W - it would slightly help compression on an older engine.

John
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Old 03-13-2017, 10:39 PM   #18
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Yup. Delo 100 40W. That's what I run with 480k on the clock.
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Old 03-13-2017, 10:54 PM   #19
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Engine: Detroit 6V92TAC, DDEC 2, Jake brake, Allison HT740
Rated Cap: 37,400 lbs GVWR
My Detroit Lube And Fuel booklet says that straight 30 weight is for temperatures from 0F to -25F, in other words brass monkey weather. Straight 50 weight is for sustained ambient temps over 100F and coolant out temps of 200F. So, straight 40 it is!

John
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Old 03-13-2017, 11:42 PM   #20
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Engine: 366 Big block Chevy! :) w/ Stick shift
I sometimes watch videos of old rigs on youtube, just to hear that beautiul DDV71 roar. A masterpiece
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