Greetings,<br><br>Would it be safe to use Shell Rotella T 15w-40 engine oil in a high-milage 1st gen. like mine? or should use the old stand-by Vavoline/Cummins Premium Blue oil?<br><br>Any info would be greatly appreciated.<br><br>Thank you,<br><br>Nicholas R. Gajewski

 

My truck was born and raised on Rotella, so I stick with it.<br>Call me flaky but I always use the same oil.<br>My '76 Kawasaki = Castrol gtx 20w-50<br>2000 Triumph= Mobil 1 <br>'92 Cummins Rotella 15-40.<br>Go with what you know unless you can't get it anymore

 

Mine has always had Rotella. The previous owner used it, and I continue to use it. I don't see why it would matter that you have a higher mileage engine. Mine has 140K. Another important thing is using Fleetguard filters, or another Cummins-approved brand.

 

Nothing at all wrong with Shell Rotella. That is all I used in my three trucks till I went synthetic. It will smell strange for about the first 500 miles or so but it is good oil.

 

Rotella oil is good oil but one other you might want to use is the Cheveron Delo 15w-40. I use this in mine along with a Donalson oil filter (Cummins approved) and the oil will just start to turn color at 6,000 miles. Many people use this combination in thier class 8 trucks around here and have had very good luck with it.

 

190k+ miles using Rotella with no problems.