when people say sumthin bad about somthin like this, everyone automatically thinks its bad an bad mouths it, i would have to see proof that this is destroyin motors.. i use rotella a have 300k on my truck an never had a problemas far as the oil bein dirty is just the way it is on a diesel,

 

there is enough additives added to quality oils. period. I wouldnt add anything to change the characteristics at all. If something did go wrong, the question would be "which product is to blame"? Yes rotella is a good oil by the way. I know that if someone buys mobil brand oil from us, and has a catostrophic failure due to thier product- mobil will pay for it. thats a good peace of mind to me. go with yer gut if it feels right, then go with it brother.

 

I'm torn between Rotella and Valvoline for my next oil change, but I wonder why Shell fuel seems to have such a bad rep (around here anyways) yet Rotella is clearly a #1 choice. Probably gonna end up going with Rotella for the price and convenience.

 

I just recently switched from Rotella to Mobil 1 5w40 because of the cold weather. I ran Rotella in every big truck I ever drove and my pickup for 3 years without incident. My first gen, which is 20 years old, when I change the oil, regardless of brand is not black for usually 3-4 weeks after I change it.

 

What is the reason Shell diesel has a bad rep in Alberta? I've used it exclusively for years and never experienced a problem, but then the climate here in New Jersey isn't a harsh as yours in Alberta.

 

I used Rotella religiously in tractors and my truck until they changed the formula with the Zinc blend. I won't touch it now. For motor oil it's all Valvoline Blue made specifically for diesel engines and endorsed and recommended by Cummins.

My motor leaks to bad for synthetic in it but I use AMSOIL in everything else for the truck and only wish I could afford it for the tractors.

 

Me personally, I have used bulk oil from the local farm/fleet stores. "Harvest king" oil made by mid states company, and a quality filter, wix or delco filters in all my gas engines and in my previous vw diesel. Haven't had any troubles yet. The 15w40 runs good in my 6.5l also. Down to zero it always starts good, even with not plugging it in, but i know i really should.....

 

Climate factors in for sure performance wise, being from Montreal I'm familiar with your climate and back East fuel quality in general seems to be far superior. Injector failures are way more frequent out here according to my research. I think it may be due to the fact that Shell don't crank out the same volume as Petro-Canada or Esso out here, and I'm sure you know that it's always better to get fuel from high volume stations. I'm also sure that Shell diesel in the US is way better than the stuff we get.

 

I made the switch from Rotella to AMSOIL 15W40 Diesel oil about a year ago (last February) and don't regret it one bit. The Dmax runs a little smoother and quieter now.

 

what do u mean its black right away? i changed the oil in my cummins like 5k ago i usually go 7500 and i checked it yesterday and its still got teh "rotella look" to it only a little darker.
just because when you change the oil in a truck the new oil is black dont mean its a bad oil. when i worked at the TA truck stop a fella came in in a brand new freightshaker with a cat in it he said it was the first oil change whether i believe him or not is a different story but as soon as i started it up with the fresh oil in it to check the oil pressure shut it off and pulled the stick and it was black as coal. and that guy made sure i put delo oil in it i guess its just a matter of opinion kinda like brand loyalty