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Bus Discussion => Bus Topics ( click here for quick start! ) => Topic started by: scotty_vince on September 20, 2010, 01:05:42 PM
Has anyone used rotella t 30w in there dd two stroke?
30wt is only advised for consistent use in below freezing weather.
From the
Detroit Diesel Lubricating Oil, Fuel & Filters guide - Page 10
http://extranet.detroitdiesel.com/pdf/vocations/Lube-Oil-Fuel-Requirements.pdf (http://extranet.detroitdiesel.com/pdf/vocations/Lube-Oil-Fuel-Requirements.pdf)
QuoteAt ambient temperatures below freezing (32° F or 0° C), sufficient starter cranking speed
may not be achieved to start the engine with SAE 40 grade oils. Where starting aids are
not available or at very cold temperatures (0° F to -25° F or -18° C to -32° C) even if
starting aids are available, the use of multigrade SAE 15W-40 or monograde lubricant
SAE 30 will improve startability. These lubricants must possess a High Temperature
– High Shear Rate Viscosity (measured by ASTM D 4741 or equivalent) of 3.70 cP
minimum. These oils must be replaced with monograde SAE 40 lubricants as soon as
ambient conditions permit.
My 671 had 30wt in it when I got it and drove it 800mi home. It also had the same stuff in the trans which is supposed to have 50wt.
No harm done that I can see.
I often use 30wt in winter because it is much cheaper at WM which doesn't carry 40wt.