Hey guys,

what do you think about the above engine oil? I see it is endorsed by Cummins and appears to be good stuff. I just don't see anybody using it or any mention about it. I am currently using Mobil Delvac, but the Valvoline is cheaper and seems more readily available.

thanks in advance!

I am using this oil in my D-Max. Just changed it a week ago. I think it would as good as any of the other regular oils on the market.

Just switched to Pennzoil heavy duty diesel 15w40. Any of the brand names will do fine.

I have "ROYAL PURPLE" 15w40 in mine, improved milage and seems to run better.

All I've used in anything after switching from Amsoil. Real good stuff, as we like the new blends better than straight synthetics. For store oils, stick with the big two. Rotella or Mobile Delvac (Mobile being a little better than Rotella). I would not run Pennzoil due to the high wax content...T

All I've used in anything after switching from Amsoil. Real good stuff, as we like the new blends better than straight synthetics. For store oils, stick with the big two. Rotella or Mobile Delvac (Mobile being a little better than Rotella). I would not run Pennzoil due to the high wax content...T we have 3 big names out west. shell, mobile, and dello. i was using amsing for about 50k miles. i just switched to mobile 5-40 synthetic. i can use it in my truck and my wifes suv. i get the oil at wally world and my mobile 1 oil filters at auto zone. i change it every 10k. and i dont mess with sending in samples. i am one of the few who dont. how much do they cost anyway (oil samples)

Shell (rotella) is a Dutch owned company, so if ya want to go USA: choose the Mobil (Exxon) or Delo (Chevron), or (gasp) one of the multi-level marketing oils, aka: Amzoil (at least it's IN country) :D

Sorry, I couldn't resist once we went: "they're all the same..." :eek:

$25 to $80, depending on what's done. In your area you could get a good one at the CAT dealer for $35 or $40. I wouldn't do it tho (I never do myself). All you do is start worryin tell you eventually start tearin stuff off your motor lookin for who knows what. If it's still in warranty there not touchin it til it starts ratllin anyway. Run it. If something breaks fix it. You'll sleep better...T

Ever open up a motor that used Pennzoil its whole life? -:t

ynot is right about the wax content.

Its a good oil, keeps a lot of Cummins running and is becoming popular for other diesels. The Wally's here sell it as fast as they get it.

Wish ours did. I buy it by the drum from Cummins at cost + 10% and it's stil pretty high. Worth it tho...T

Patriotism?

Actually, Shell is an Anglo Dutch (English and Dutch) company and it technically is listed on the London Stock Exchange (as its primary listing).

Dan Diesel - Not sure how much you know about lubricants, but Rotella is produced from the same base stock as any other non-synthetic oil (and if you buy it in the US, it is produced in the US) none of the majors transport lubes/oils in from overseas as it is not practical due to cost. Therefore, your theory makes little sense as Shell Rotella is just as American as an oil from Exxon-Mobil (maufactured in America by Americans working for Shell in the US). The difference between the oils are the company specific additives and agents.

By the way, Penzoil is also a Shell product. So if anyone else wants to "buy American" and does not understand the above paragraph, you might want to stop using Penzoil.

Hope I did not present a biased view on which oil is better (you decide), but I do hate to see the source of my (and about 20,000 other American) paychecks get misrepresented.

Actually I know enough to get me into trouble on the lubricants side, as well as on the Oil co. side, since I too spent a career (now retired) working for Chevron.

I mainly wanted to fire folks up a bit and should have maybe put a smiley face or two in my post, not intending to flame your employer... But just to carry the theme a bit farther: pretty much all the major international integrated oils work the same way, and your lubricant oil or gasoiline or diesel for that matter could have it's "roots" (where the crude came from) in the middle east, US, Mexico, etc.

My point was more where the profits go, and I'm sure you understand where the headquarters are is ultimately where the bottom line is. 'Nuff about that :) , heck it makes a good argument for not buyin' a Dodge tho... :rolleyes:

The Penzoil info is a very dated historical truth, that now no longer is. They used to use only crude that was very waxy for their base stock and they no longer do...