idiabuse
Full Access Member
That's a little misleading. Drain interval for our trucks is between 50-100k ( 50k for severe service which would include those of us who do heavy towing or spend a lot of time on dirt roads ) Big truck axles are built with a bit more overkill and have a higher drain interval on dino oil to begin with
Well OK
Misleading? well who owns a vehicle longer than ten years? especially a 20+ year old vehicle?
Ok I do, but most people never service the transmission or rear diff until FAILURE.
So my thinking is those people that actually decide to change fluids in a diff or a slushbox, AMSOIL is a lifetime fill for them.
And to add, AMSOIL did, or still may have a lifetime fill interval on pass car diffs and light trucks.
I have serviced hundreds of rear axles, I can safely say that AMSOIL is a lifetime lubricant compared to anything NAPA carries.