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07/03/2018 01:00 AM

What engine oil do I use for my MCI Bus with a newly rebuilt Detroit 6V92 engine ????


Over the years, Detroit has been the most successful engine  used in passenger buses.
Recently however, companies have strived to meet ecological standards.
Most recently Detroit, that had the famous 6V92 in all MC9s, now offer their 4 stroke series 60, 300-500 hp engines.
This is a great engine, but it's fairly new; less than 15 years in popularity, and is also one of the most expensive ones in the marketplace. They average between $18,000 - $27,000.  

Our research has shown the best bang for the buck in an MCI upgrade is the 4 stroke series 50 or 60, 300-500 hp engines.
The Cummings Big Cam 400 has also made a lot of progress in upgrading buses too...
Of course they have their other electronic versions in the 400-500 hp class too. 

More images of our stretched 45 for much larger engines ...

Detroit 8V92 installed in a Neoplan Double Decker

Images of Cummins ISM electronic models

We use the Allison 7400, BC400-B500 Transmissions because it's easier to retrofit in an MCI 9, and the prices are the most competitive.
Prices can vary from $4500 for a used up to $8000 for a rebuilt and $15,000 - $18,000 for a brand new.


cummins.jpg (16345 bytes)
Cummings  Cummings  Detroit Allison 653

To offer a true national warrantee ..
We install Detroit factory remanufactured Engines 
These Images below are of our shop in our PA plant.

 Detroit 6v92 & 8V92 engine overhauls.

Detroit 8V92 475 HP


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MCI Bus Oils

MCI-9, MCI 102,  6V92 & 8V92 Engines    
Power steering            30W SAE oil    
Allison 740    


Shell Rotella "T"

printable version - opens in new window

Product Description  
Shell ROTELLA® "T" , Single Grade Oils are high quality single grade oils blended to provide excellent performance in diesel engines of many major manufacturers .
Always follow the correct performance/viscosity/ temperature guidelines.

  Detroit Engine  Recommendations

Detroit Diesel Engines,     Shell Rotella   "T"1
Detroit Diesel series  6v92 and 8v92
2-Cycle Detroit Diesel engines

API CF-2, SAE 40, SAE 50

(SAE 30 when below 32º F)

Shell Rotella® T1 SAE 40, 50

(Shell Rotella® T1 SAE 30
2006 and older DDEC series 40, 50, 55, 60 4-cycle diesel engines

2006 and older MBE 900, 4000 diesel engines

DDC 93K218, 93K214,

Shell Rotella® T6
Full Synthetic 5W-40
Shell Rotella® T5 Synthetic Blend Technology 10W-40, 10W-30
Shell Rotella® T Triple Protection® 15W-40

Technical Break down

Shell ROTELLA® T SAE 10W  20 30 40  50
API CF-2         Detroit Diesel Series 53, 71, 92  use Rotella T1 SAE 40 or SAE 50 -- -- X X X
Allison Transmissions  C-4, C-3 X -- X -- --
Eaton Transmissions -- -- X X X
Dana Transmissions -- -- X X X

Applications of Rotella "T"

  • Detroit Diesel two-cycle bus engines (Detroit series 53, 71 and 92
    API CF-2, SAE 40 or SAE 50 (SAE 30 when below 32º F ambient temperature
  • Heavy-duty, automatic and power shift transmissions specifying an Allison C-4 fluid or use of API CF-4,
  • CF-2, CF or obsolete CE, CD and CC engine oils
  • Heavy equipment used for construction, mining or quarry operations—in engines, transmissions and hydraulic systems
  • Farm equipment with diesel or gasoline engines
  • Mobile, marine and stationary diesel engines (except those with silver bearings) in severe service or applications calling for API CF-4 or CF-2 engine oil


  • Has excellent wear protection that promotes engine durability
  • Low ash content minimizes formation of deposits and keeps intake ports clean
  • Outstanding oxidation resistance maximizes service life
  • Excellent rust and corrosion protection of critical engine parts
  • High dispersion-detergency protects against engine sludge and varnish deposits
  • Additionally, for heavy-duty transmission applications, the SAE 10W and 30 grades meet the performance requirements of Caterpillar TO-2 and Allison’s C-4 specification.

Castrol oils are also excellent oils too.

They produce the famous synthetic  transmission oil called
Castrol TranSynd
Can be purchased from any Detroit Diesel and / or Allison dealer in your area

Let us know if we can help in your upgrade needs.

We have been asked by a lot of people where they can buy brake drums, brake shoes, shock absorbers, airbags, etc.
There are a lot of companies out there, and you can find a good parts supplier in your community.
However, we use and recommend Napa Auto Parts because of their  large selection of quality heavy truck parts.

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