Flying Finn Posted April 10, 2019 Report Share Posted April 10, 2019 I have a VNL 770 with a Cummins ISX engine. A diesel mechanic suggested I switch over to Rotella. Anyone heard of doing this? Has anyone done it? He told me allot of the old time truckers use engine oil. I don't remember the reason. If you changed over notice a difference in steering? Any negatives to changing over? Benefits? Thanks Brad Quote Link to comment Share on other sites More sharing options...
WILDEBILL308 Posted April 10, 2019 Report Share Posted April 10, 2019 25 minutes ago, Flying Finn said: A diesel mechanic suggested I switch over to Rotella. Anyone heard of doing this? Has anyone done it? Brad Before I did I would ask to drive his rig and see how it works. I am willing to bet he hasn't done this. I would NEVER do it. I am trying to figure how someone thinks engine oil and transmission oil can be swapped. Bill Quote 2008 Newmar Mountain Aire model 4521 450 hp Cummins ISM Allison 4000MH tran. Towing a 2014 Honda CRV with a blue Ox tow bar Home base Fort Worth Texas A man who carries a cat by the tail learns something he can learn in no other way. -Mark Twain- Link to comment Share on other sites More sharing options...
jeffw Posted April 10, 2019 Report Share Posted April 10, 2019 I'd suggest using whatever is listed on the side of the P/S reservoir. Older trucks used engine oil, newer trucks use ATF. Quote 2007 Volvo 780 Volvo D12D, 465hp, 1650 ft/lbs tq., ultrashift Link to comment Share on other sites More sharing options...
Scrap Posted April 10, 2019 Report Share Posted April 10, 2019 Engine oil is legit for Sheppard gears. Dex II or III for TRW/Ross gears. Watch your max temps if using engine oil. Maybe put one of those sticky temp thermometers on the reservoir and check it out for awhile before swapping over. Don't dry steer it with 10-40 either, but a truck shouldn't be dry steered anyways. Quote Link to comment Share on other sites More sharing options...
RainbowStalin Posted May 27, 2020 Report Share Posted May 27, 2020 Had a similar situation. The mechanic told me that I need to switch power steering fluid from transmission fluid to Rotella. I told my friend about it (he's a car enthusiast) and he told me that there is something wrong with this suggestion. And he was right. Instead of switching fluids, I switched the mechanic himself, lol. Quote Link to comment Share on other sites More sharing options...
Sehc Posted May 27, 2020 Report Share Posted May 27, 2020 If your steering specifies motor oil, Rotella is a good oil. I only use what is recommended by manufacturer. Transmission fluid, or power steering fluid, or maybe even 30w. Quote Link to comment Share on other sites More sharing options...
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