garageman402

OK!!

People over at BITOG are calling them an "unscrupulous blender"......

Grumpy, Percentage of what? The difference in viscosity at 40C and at 100C?. Or loss through the OCI? Usually with evaporation, the viscosity increases over the life of the oil. So 60cSt to 10cSt is a 83.33% drop, would the HTHS will be expected to drop from 3.0 to 0.5? Edit: Are you referring to viscosity loss due to shearing? Thanks!!!

Thanks Grumpy, That does explain the higher Ph allowed for an SN. So SP will not allow Ph over 850? I know Ph is an integral part of ZDDP, does the Ph actually provide the AW? Or the Z? or both? The only way to get Zinc into an oil is through ZDDP? How about Moly? I recall oils increasing Moly to compensate for lack of Z, is that true? Agreed that UOAs mean nothing except to the owner of that particular UOA. I would look for a pattern across several UOAs, which, actually is what Blackstone does in their "Universal Averages" column. But you're right, we don't know the history, sample method, etc. I actually got different results sampling from the drain plug during a drain (midstream) than from sucking it out of the dipstick tube. Yes as far as licensing, I am looking for better AW additives within the scope of the Dexos license parameters. But IIRC, formulators submit their test results for license approval, and the blender CANNOT deviate from that. Different license holders may have different formulas, but they are all restricted on ZDDP. I don't see a great amount of Moly compensating for the reduction of ZDDP, is that what you are alluding to in that the licensing requirements basically ensures the engine's demise when the warranty expires? Even the State of California is discouraging oil changes at less than 7500 miles. Triax seems to be pretty good as far as AW. I have it in my 71 402, haven't really run it much since then. I'm wanting to put it in all my vehicles, but worry about cat contamination. I have a 2021 motorhome on a 2020 Chev Express chassis 6.0L with 6670 miles. I changed out the factory fill when I got it at 2330 miles. Yes it's "new" but they drove it here from Indiana. It should be tight still, you think the Triax would pose a threat to the cat? The other vehicle is a 2008 Buick Enclave with 175,000. Oil has diligently been changed usually less than 4000 miles, it may not be tight anymore. Has new cats, just been tuned. 4th vehicle is 2000 Pontiac Montana with 3.4L V6. GM Service Replacement motor has about 70,000. Oil changed very frequently on it, probably average of 1500 miles. Thanks!!

Hi, This is my first post here, I picked this comment to reply to. I am referring to licensing. I have been researching Triax SRT which you have mentioned on this site. I saw a Virgin oil analysis (.jpg attached) showing very high phosphorous, and it is not Dexos1 Gen2 licensed, but it is SN+. You state both of those approvals require lower ZDDP (due to the phosphorus content). So how can this oil be SN+ approved? I also read a UOA of this oil in a VW where the wear numbers were high, and the HTHS was not high enough for VW approval. Also a Viscosity of 9.9 was too low for VW. I think it was the SRT not the Euro formula. I do have UOAs (.pdf attached) for the Euro formula in a 2020 Ford F-150, showing lower Ph and Moly levels. Would this indicate the Euro formula is more in line with Dexos1 Gen2? Thanks for any help uoa.pdf