So I've been reading up on this 2 cycle oil topic for a while now and I'm about to go cross eyed. I have a 2008 6.7, and the last post I can remember seeing about using 2 cycle in a 6.7 was posted somewhere around 2008. Is it still considered a waste of money using the 2 cycle oil in a 2008+ engine? Or has it come to light in the past 8 years that it does have an effect?
Is it still considered a waste of money using the 2 cycle oil in a 2008+ engine? Or has it come to light in the past 8 years that it does have an effect?
The last i had seen on the 90+ page thread that I read was that the verdict was still out on whether or not 2 cycle oil would benefit the 6.7's. I guess either way, it wouldn't necessarily "hurt" it I guess.
This may not be of help but I once worked for a trucking company back before emissions, in 1987,to 92 and they blended the motor oil into the fuel tank at each oil change, the fleet was 80% cummins. I guess at 12 gallons per oil change and 4000 trucks it was a big savings and approved by the engine manufacturer, again, that was a long time ago, lol. It didn't harm anything at the time. By the way Thanks for your service bud.
Yea, I guess it has something to do with the 6.7's made to run off of the newer ULSD fuel. The posts I was reading were older ones. Guess I need to dig a little further in to it and see if there are any updates. Thank you all for the replies though!!
My '07 5.9 commonrail has been running amazingly well on all of the above for many years now. It gets >20mpg unloaded on the highway at 70mph and seems to like 2qt./tank of the filtered motor oil spiked with 2-stroke at about a 5-1 ratio just fine.
I used to run 2 cycle oil in my previous 7.3 PSD with a 1mpg improvement. I haven't considered such with the new CTD with all the emissions -- has there been any input as to impact to the CAT, DPF, etc?
The lubricating advantages of 2-stoke are for pre-2007 engines. Its been advised to NOT use 2-stroke, or any other oil, in the fuel of trucks built after that date due to their emissions components. Rather if you feel the need to run a fuel lubricant, use something else which states that its OK to use in the more EPA friendly trucks.
Thanks for the confirmation. I haven't felt the need for it, as I did with the old PSD, but would be interested anything that happened to improve MPG.
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
Cummins Diesel Forum
8.8M posts
379.2K members
Since 2005
A forum community dedicated to all things Cummins Diesel! Originally founded for owners and enthusiasts of Cummins powered Dodge pickups, the Cummins Forum has expanded to include ALL Cummins Engine applications! Come join the discussion about reviews, drivetrain swaps, turbos, modifications, classifieds, builds, troubleshooting, maintenance, and more!