Just a thought about oil.

[Floridianson]

When I got mine it had 15/40 Diesel oil. Now Rotella T has close to 1220 ppm if I remember. Also I feel this is not best for use in the M37 and myself to heavy of an oil. I went with the Amsoil Z Rod 10w30 and it says it has 1400 ppm and it is synthetic. Just my .02

 

[John Mc]

Amsoil Zrod 10W-30 is what I started using at the first oil change after I bought my M37. It's been working fine. It's expensive stuff as oil goes, but I'm basically changing once per year, so not that big a deal.