Oil and oil/fuel additives

[OKIE9ERS]

Sorry if this is addressed elsewhere on here...Ive read posts for hours and havent seen..
Is straight 40wt still the best for my 8v-71?
Not real common in the trucking industry, where my experience is...
And, in my business, people swear by Lucas oil treatment, as well as fuel treatment..MCI, in a '89 manual that came with my 81, says not to add anything to oil or fuel...Opinions??
Thanks

[chessie4905]

GM has always held that oil and fuel additives are not necessary and a unnecessary additional expense. They've held that opinion for years.
Two cycle Detroit Diesels call for a specific 40 weight oil. No other oil is approved, except for 30 weight in cold ambient temperature operation.

[luvrbus]

A good brand of straight 40W no additives in the fuel unless you need one for gelling and the 8v71 will serve you well if you are not in a hurry power houses they are not but dependable with a little TLC 

[eagle19952]

Sorry if this is addressed elsewhere on here...Ive read posts for hours and havent seen..
Is straight 40wt still the best for my 8v-71?
manual , says not to add anything to oil or fuel...Opinions??
Thanks

40 wt. it's a two stroke. 40wt is still the best,except in the Arctic, then 30 wt.
10 wt oil to the fuel if it's dry...2 quarts to a tank.
Those guys that wrote the manual were pretty smart, imo.

[OKIE9ERS]

Thanks so much guys...
I get it on the 40 wt...
Again my experience is with trucks, and with the different qualities of diesel you might come across, still no cetane boost or injector cleaner? Algae has also become a problem in trucking, and I sell stuff for that as well. Algae comes from water, and the treatment reomoves the water before the algae can happen...Customers regulary add these things to hopefully head off a problem before it happens...Bio diesel didnt help things either..
I just want to feed this old girl the best I can to get the most out of her...
Thanks again!!!

[Geoff]

Actually, 15w-40 is (or was) approved for low temperature operation of our beloved 2-strokes.  I have it in a published DDA document.

[chessie4905]

" and I sell stuff for that as well". Do you sell Amsoil products?

[eagle19952]

I sell stuff ...

then you should know best...

[OKIE9ERS]

I don't know best--that's why I'm asking..I do know that a lot of the diesel dumped into tanks leaves a lot to be desired..
And I know that there are products that can help with that. I guess I'm just wondering why bad diesel effects trucks but not buses?
It didn't take long for this to turn crappy
Sorry to have taken up your time

[luvrbus]

Two totally different fuel injection systems Okie,the fuel system on a 2 stroke was made using a yard stick compared to the newer high pressure common rail systems of today   

[eagle19952]

I don't know best--that's why I'm asking..I do know that a lot of the diesel dumped into tanks leaves a lot to be desired..
And I know that there are products that can help with that. I guess I'm just wondering why bad diesel effects trucks but not buses?
It didn't take long for this to turn crappy
Sorry to have taken up your time

Otto designed them around peanut oil.

[Van]

Two totally different fuel injection systems Okie,the fuel system on a 2 stroke was made using a yard stick compared to the newer high pressure common rail systems of today   

Hey Clifford are they still putting the CF2 on the straight weight jugs?
   I wouldn't know, don't have to buy the stuff any more. 

[CrabbyMilton]

I grew up with those constant STP ads on radio and TV for both gasoline and oil treatment versions. This was in the 70's but once I got my own car, I was told that such products were increasingly not needed since STP and others like them were from a time where fuel and oil were often of various quality.
Fast forward to today where 100% synthetic oil regardless of weight classification is better than conventional with the additives. As for fuel, some would contend that at least gasoline, you may need some different additives because of reformulation but diesel is fine for the most part.

[luvrbus]

In all my years I have never saw Algae in a bus fuel tank,the last I knew Algae was a plant that required sunlight to grow.We would cover a pond with black plastic to kill Algae on the farm we would get crap in the fuel tank on the boat but it wasn't Algae     

[richard5933]

Wouldn't a truck with external tanks be much more susceptible to algae than a bus with internal tanks? The sun beating on the tank will keep the fuel warmer, causing increase in growth. Not all algae require sunlight.