Good discussion guys! Albeit some of it comes across as arguments, but I have decided to look for oils that have moly already added to their formulation so that I don't end up adding too much moly to my oil mixture. I like how moly has been around for a long time as a good, proven lubricant. Thanks for the responses! All of them are being considered
Mos2 is a different type of moly and not the same as what's found in typical motor oils.
Mos2 acts differently as well.
The organic type found in typical engine oils doesn't plate/anneal the engine parts that touch each other like mos2 does.
Mos2 fills in the hills and valleys typically found on metal parts creating a super smooth surface. Mos2 plates these surfaces and creates a sacrificial layer the parts slide on until oil reaches the moving parts. Once the engine cools the plating effect repeats itself.
In my experience I've found that mos2 doesn't do a whole lot when used in newer engines,however once an engine accumulates miles/wear mos2 will aid in restoring lost mileage and potentially lost efficiency by improving ring sealing against cylinder walls.
In my small 160cc Honda engines,that turn air compressor pumps I use it every second oil change,a few ounces,and I've got motors with in excess of 10000 hours,which is basically unheard of due to the conditions these engines run under onsite,from extreme dust and 35c heat in the summer to -40c in the winter and these high hour engines still start first pull,without anything more than oil changes.
So the 7 dollars I spend per can saves me way more than that once service and replacement costs are considered,especially once you figure I've got 16 of these Honda powered compressors,cost savings become exponential.
And presently I'm tracking mileage on the new to me 2001 Sierra C3,with the awd and 6.0 engine.
Thus far 1000 miles(2 tanks)into tracking mileage my best mpg on my commute since the new fuel pump has been 17mpg at 60mph,which is turning the engine at roughly 1700rpm.
Since my commute is 33 miles each way and traffic non-existent I feel its consistent enough to accurately track mileage in a meaningful test,with wind being the only uncontrolled variable.
I'm going to run 10000 miles like this on this oil sump load then at my next oil change add mos2 and track another 10000 miles and note any changes.
Truck has 200k kms/120k milesish which,from my experience with the LS series engines is enough wear to note any improvements in the noted areas.
I'm changing the plugs this weekend and will note any improvements when that variable is considered.
I only adjust a single variable at a time,so any changes can be noted and proper credit given to each adjustment(if any improvement is noted).
Bitogers are a tough crowd which is why I only share my experiences when asked. I don't need the headache that inevitably comes with any claims made when using an oil additive.
Liqui-moly products are the only additives I will spend money on. I've found that they work as described,however today's engine oils are so good that oil additives really aren't required,however in my quest for improved fuel efficiency reducing friction can help gain a mile or 2 per gallon.
In a big v-8 engine a reduction in friction is more noticeable than in a small inline 4 cylinder. More moving parts touching each other means more friction.
Flame suit on.