Well, I decided to get some information from the "horses mouth" & called Schaeffer's & spoke with "Larry" in their "Technical Dept. ".
According to "Larry" (who seemed quite knowledgable), their 7000 Series (synthetic/conventional blend) is already API Licensed. Their 9000 Series is about to be classified, in the near future. He said the additive suppliers are quite involved in the API Licensing & are going through the testing phase, as we speak. BTW, it costs about 2-1/2 million dollars to earn an API license for a given oil product.
I told "Larry" about the articles in the TDR Mag suggesting that the new CJ-4 rated oils were not as robust as the older formulation (CI-4+), especially in the older engines, using LSD & running extended oil drain intervals. I asked him if the higher sulphur LSD had a negative impact when extending the oil drain intervals.
His response was that the LSD had NO impact on extended oil drain intervals when using LSD. They had tested their oils extensively with extended ODI's & had great results with their oils. They even tested the new formulations using fuel with 4000 ppm (That's right. Four thousand ppm. ) just to see what the effect would be & the oils held up well.
He, also, said that the CJ-4 is, actually, much more robust than the older CI-4+ formulation. The base oils & the additive packages are much stronger. I asked him if he, personally, would be concerned about running extended ODI's in his engine, using LSD, & he said that he would not be concerned, at all. (He seemed quite enthusiastic about their new CJ-4 formulations. )
Larry also said that much of the LSD(500 ppm) actually has only 25 to 150 ppm sulphur content. If the fuel tests over the allowed 15 ppm(ULSD), it gets the LSD rating. So, the oils really don't have to deal with much sulphur, at all.
When we first started hearing all the negative comments about the new CJ-4 formulation, I called both Chevron & Schaeffer's & spoke with their tech. dept's. Both of the engineers told me, basically, the same story. The same story Larry told me, today. Larry was quite convincing & didn't sound like he was just trying to sell me his product. He seemed to have a lot of facts generated from extensive testing.
I sure would like to get Larry & the two other engineers into a room with the gentleman that wrote the oil articles in the TDR. That would be an interesting debate!!!
Joe F. (Buffalo)