Rual King 15-40 diesel oil???

   / Rual King 15-40 diesel oil??? #1  

John White

Gold Member
Joined
Dec 7, 2006
Messages
465
Location
Newark, Oh
Tractor
Bob Cat Ct335
Is Rual King diesel oil 15-40 any good. They have it on sale 2 gal for $13. It says Caerpiller approved. How would it compare with Shell Rotella?
 
   / Rual King 15-40 diesel oil??? #2  
That is a cheap price. I don't know anything about that oil. I am not super picky with oil brands but I do stick to the main brands and buy whatever is on sale either rotella, delo, delvac, etc. I don't try the house brands but they are probably ok. What are you putting it in? Reason I ask is most compact tractors don't take much oil so the cost savings don't add up to a whole lot in terms of dollars. Yes it is about $5 cheaper per gallon but if you use four gallons a year is $20 worth it? My dump truck takes 11 gallons. Cheap oil is real tempting for it but I still stick to the big three.
 
   / Rual King 15-40 diesel oil??? #3  
We now have a Rural King in Paducah and they have some great motor oil prices. Since we do not put a lot of hours on the tractor and backhoe and want they to start well in cold weather IF needed so I am still using 5W-40 Rotella. I try to do a filter change every year if we do not change the oil. Plus we use Archoil AR9100 in the crankcase and that is to double the oil change intervals.

Now we just did a bucket flush on the 1500 Dodge Ram transmission and when with the WalMart $4.27 per quart ATF 4+ current specs by Chrysler. CarQuest house brand is about $3 a gallon more and the add pack in both brands come from the same source in fact all ATF 4+ approved ATF gets the add pack from the same Chrysler approved source.

Rural King motor oil I am sure is just fine but $$$ wise like bdog stated we are not talking about much difference in my case.

The transmission bucket flushes takes about 14 quarts so the difference between $4.27 and $8.19 that meets the same specs does not make sense to pay in my mind. When it comes to UTF I tend to go with the Premium line from TSC for the backhoe (22 gallons) and 8 gallon for the tractor. We did change out the oil in the 1989 F700 dump system last year and when with the lowest price UTF that we could find. It looked like based on the build up in the holding tank it was the first time it had ever been changed.
 
   / Rual King 15-40 diesel oil??? #4  
If it is like most other store label brand oils, it is probably done for them by Warren Oil. It is as good of quality of oil as most any name brand on the shelf. Warren is a very reputable blender with a long track record of putting out quality oils. It will meet all the specs that they list on the jug just fine.

What many folks fail to understand, is that there are only a couple of refineries that make the bulk of base oil for the entire N. American market. And there are a couple of additive makers that put together the additive packages in the oils. Most all brands and no-names get their base oil and additive packages from these suppliers. Shell has the largest conventional Group II / II+ base oil refinery in the U.S. at Port Arthur, TX. Lubrizol and Infineum make most of the additive packages for the N. American market. Blenders like Warren just mix it together for someone, slap on a store label, and ship it out. Even high brow oils like Amsoil get their additive packages from Infineum and Lubrizol, as do all of the other name brands. I use Schaeffer brand oils and greases, the oldest oil and lube maker in the U.S., since 1839, and they get their base oil from other refiners and their additive packages from the same makers as everyone else. The blend might be tweaked a little to give it some characteristic that the blender wants, but even using base formulas, it will meet the current motor oil industry standards. Schaeffer does like to boost their stuff a little with more moly and some proprietary friction reducer they call Penetro. Other brands tweak the add packs a little in similar fashion.

Get some of the Rural King and try it out and see if it doesn't do a great job.
 
   / Rual King 15-40 diesel oil??? #5  
Hot dog, you are in luck! I just found where the Petroleum Quality Institute of America analyzed Rural King 15w40. Just as I thought, it is as good of oil as any other 15w40 conventional on the shelf. It meets all the industry standard requirements. It is average, so it does not have any special unique qualities, but it is a good oil. Has a nice load of Zinc and a fair amount of moly in the mix. Nice. And is has a nice level of Calcium and Magnesium, both part of the detergent package of the oil. I cannot see where you would go wrong saving a few bucks and using it.

Petroleum Quality Institute of America - Data Template
 

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