Hello All, found this oil article pretty interesting.
This came out around 2007-ish, when new diesel emissions hit and companies were forced to change their oils to accommodate new emissions equipment: the diesel particulate filter.
I have been running diesel oils in motorcycles for years. I realize that many prefer to use the name brand of the company, etc.
But if the spec fits and fits well and I already have diesel oil (in fact everything I own uses the same oil) I have no problem using it, in everything.
Diesels undergo tremendous heat and pressure. Motorcycles, especially air-cooled units, get a lot of heat. And common sump motorcycles replicate pressure in the transmission. At least so I am told.
The article speaks about quality of certain oils, which definitely surprised me at some of the results. The prices are very different today, but some of the best performers were:
Valvoline Premium Blue
Rotella T6 synth
Delo 400 Synth
Valvoline Premium blue
Some of the least performing: (not necessarily bad, but worst out of the group tested)
Delo 400 LE (low emissions for 07+ diesels with particulate filters)
Amsoil Premium Synth (not expecting this one)
Better than these? (and cheaper)
Walmart Super Tech diesel oil...
My take away points:
I have always heard good things about Delo, apparently this is the non-le version (still made hard to find at retail)
At retail synthetics often cost 2x conventional cost. At the time of this post usually $12-ish vs $22-ish
Valvoline premium blue I can only find for $15 cheapest at tractor supply. Other places want to charge $18 for it.
Delo 400 (non-le) I cannot find locally anymore at retail
I can get Rotella T6 on Amazon Prime via subscription (X amount every month or 2 months) which brings the price down to around $17-$18 shipped and I don't pay tax. Which makes it at most only $2 more expensive per gallon than Valvoline Premium Blue at TSC. I also don't have to go anywhere to get it sinceTSC is a few miles away.
The other good oils are not nearly as cheap on Amazon.
Being an older article, formulations can change (particularly wal-mart which contracts their oils out). However, although diesel emissions did change, the added equipment (urea injection) is not sensitive like the Diesel Particulate Filters.
So I don't see a reason that the main diesel formulations would change like they did in 07. Which means this article may still hold true
As I mentioned I use Rotella T6 in everything. I was hoping to save some money using conventional oil in power equipment, but it doesn't seem worth it in my situation, especially since I require cold weather usage 50% of the year.
If I could not get Rotella that cheap, I would try to find some Delo 400 (non-le) or Valvoline Premium Blue, whichever I could get cheaper. Then pay extra for a synthetic 5w40 in winter.
Link for understanding viscosities