Has anyone that has run Powerservice and Marvel Mystery Oil in every tank ever had lift pump or injector problems? I ran it for almost 400k in my IDI Ford and have every tank but two in this one. I was just curious to see how far this combo can can take LPs and injectors.
Thanks
Joe

 

I have been using a PS/MMO mix(3 parts PS/1 part MMO), 16oz in every tank for the last 45,000 miles or so without any issues. I am afraid to go without it for a few tanks just to see if I can tell the difference now. Cheap enough for the potential lubrication and cleaning for me.

 

I am about the same in reguards to milage. I stopped using it once when I was out of town and lost 1-2 mpg and it was noticably louder. I run about twice as much MMO as you do though. I wonder who has the most mi.(trouble free) running this mix?
Joe

 

75,000 on my truck and have used it every tank with no problems so far. I put some in the tank of my dads 01 w/ 320,000 miles and he said that he got 17.5 mpg. he hadn't seen 17.5 in that truck in a long time.

 

!998 24v. 170K no fuel system issues,2002 24v,33 K,no fuel system issues,03 HO,153K no fuel systems issues,05,100K,no fuel system issues. I've spent less than 50. dollars on additives.,only in extreme cold weather operations ,for anti-gel reasons.Diesel is costly enought with-out wasting money on additives.

 

Other than to try out a couple of bottles of additives just for fun, my 50,000 mile Cummins engine has not seen any additives either. Seems to run just fine on good ole number 2 diesel. I couldn't tell any difference in performance or sound on the couple of times I ran the additives. I think it is a waste of money.