quote:
Originally posted by Al:
jon No my friend I'm not kidding
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It can happen. It has happened.
Just because you don't hear of things like this or see it advertised does not mean it does not happen.
Have you seen Berings on conventional oil for 500K in a Diesel Truck engine look like NEW.
Have you heard of the same oil giving over 1.+++++Million miles on same type motor with no decrease in MPG nor any repairs to the motor? This same oil a DINO depending on engine (older style) can go up to 70+K and still be suitable for service... Yes a Dino. Naturally these engines are not throwing a lot of soot back into the crankcase like the newer designs.... but the increases are out there.
Just one of mt oils will yield a minimum over 4%
and over 6 and 7 % have been noted on some fleets. This is with just the oil, add a fuel treatment and figure a few more % increase.
In my own private automobile I have gone over the life of the truck (gasoline) from the first ~~26+K under 21 for sure, new 16-18 then 18-21 averaged, later changing the oil brand went up and changing again the type of oil to a Moly oil it went up again to now around over 24 ish, and so far it has gone up every year... with the truck with a couple hundred miles short of 400K.
Others with or without Syn in their engines with less miles (320-380K) have seen a steady decrease in MPG. I have seen some engines improve little and some a lot.