who all uses synthetic oil?

[dwost]

Amsoil

 

[shadow753]

I switched to shell rotilla t6 at 200 hrs on my 3320 and it seems to start quicker and run quiter

 

[Dargo]

Mine is done by Growmark..A division of Farm Service and Country Companies..

My oil supplier offers if for free..

The oil guy mentioned Black something is a good place to get it done..

Generally like stated above, if you do it a few times then you know what is going on and not much need for it down the road..

When I switched to another brand (Rotella)mentioned in this thread is showed on my next analysis in a negative way..Then I switched back and it straightened out the results..

I think most all oils are pretty dang good anymore, but the education of oil analysis is very interesting..

Yes, as mentioned, the lab is Blackstone. I too noticed significantly reduced quality with Rotella after doing a couple of UOA's with it over the years. The TBN seems to drop quickly with Rotella among readings of increased wear while using it. I suppose there is a reason it's pretty well the cheapest diesel oil available. I used up what I had left in old small gas engine equipment and have never used it since. Amsoil out of my pickup after 7k miles was pretty well better than new Rotella! I'm not pushing Amsoil, but it's one of the best along with Royal Purple and Red Line. I generally run Royal Purple in my collector muscle cars since I can just go to the store and buy it off the shelf.