Just bought from the widow of the original owner a 1992 Dodge W250 LE 4X4 Cummins 5 speed manual with 69,000 original miles... . been looking for 6 months or so and friends have been harassing be to get a Cummins for a lot longer than that... been towing my old Vintage Power Wagons to shows with a Gas W200 beefed up... I am familiar with the pitfalls of the Getrag and have researched the Advance Adaptors NV4500 conversion but the truck shifts good and I would like to prolong the low mileage Getrag for the time being and was therefor wondering in addition to the reccomendations to over fill by a quart... what specific types of oils TDR members might suggest as an alternative to the 5-30 motor oil stated in the manual. Thanks in advance... Roger in Vermont